rerf.or.jp Website Information
Daily Unique Visits: 5,614
Daily Page Views: 22,456
Income Per Day: $63
Estimated Value: $34,020
This website is located in Japan and is using following IP address 150.60.176.189. See the complete list of popular websites hosted in Japan.
rerf.or.jp is registered under .JP top-level domain. Please check other sites in .JP zone.
Website rerf.or.jp is using the following name servers:
- ns2.rerf.or.jp
- ns1.rerf.or.jp
and is probably hosted by CPI-NET KDDI Web Communications Inc., JP. See the full list of other websites hosted by CPI-NET KDDI Web Communications Inc., JP.
The highest website rerf.or.jp position in Alexa rank database was 40992 and the lowest rank position was 997796. Current position of rerf.or.jp in Alexa rank database is 223527.
Desktop speed score of rerf.or.jp (46/100) is better than the results of 19.93% of other sites and shows that the page desktop performance can be improved.
Mobile usability score of rerf.or.jp (100/100) is better than the results of 100% of other sites and means that the page is mobile-friendly.
Mobile speed score of rerf.or.jp (33/100) is better than the results of 12.14% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.
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rerf.or.jp Alexa Rank
The traffic rank is based on three months of aggregated historical traffic data from millions of Alexa Toolbar users and is a combined measure of page views and users.
rerf.or.jp whois
WHOIS gives you the ability to lookup any generic domains to find out the registered domain holder. WHOIS database are provided for information purposes only. It allows the public to check whether a specific domain name is still available or not and to obtain information related to the registration records of existing domain names.
[ JPRS database provides information on network administration. Its use is ]
[ restricted to network administration purposes. For further information, ]
[ use 'whois -h whois.jprs.jp help'. To suppress Japanese output, add'/e' ]
[ at the end of command, e.g. 'whois -h whois.jprs.jp xxx/e'. ]
Domain Information: [ドメイン情報]
a. [ドメイン名] RERF.OR.JP
e. [そしきめい] こうえきざいだんほうじんほうしゃせんえいきょうけんきゅうしょ
f. [組織名] 公益財団法人放射線影響研究所
g. [Organization] Radiation Effects Research Foundation
k. [組織種別] 財団法人
l. [Organization Type] Foundation
m. [登録担当者] SO34347JP
n. [技術連絡担当者] KS20898JP
p. [ネームサーバ] ns1.rerf.or.jp
p. [ネームサーバ] ns2.rerf.or.jp
s. [署名鍵]
[状態] Connected (2022/03/31)
[登録年月日]
[接続年月日]
[最終更新] 2021/04/01 01:01:51 (JST)
[ restricted to network administration purposes. For further information, ]
[ use 'whois -h whois.jprs.jp help'. To suppress Japanese output, add'/e' ]
[ at the end of command, e.g. 'whois -h whois.jprs.jp xxx/e'. ]
Domain Information: [ドメイン情報]
a. [ドメイン名] RERF.OR.JP
e. [そしきめい] こうえきざいだんほうじんほうしゃせんえいきょうけんきゅうしょ
f. [組織名] 公益財団法人放射線影響研究所
g. [Organization] Radiation Effects Research Foundation
k. [組織種別] 財団法人
l. [Organization Type] Foundation
m. [登録担当者] SO34347JP
n. [技術連絡担当者] KS20898JP
p. [ネームサーバ] ns1.rerf.or.jp
p. [ネームサーバ] ns2.rerf.or.jp
s. [署名鍵]
[状態] Connected (2022/03/31)
[登録年月日]
[接続年月日]
[最終更新] 2021/04/01 01:01:51 (JST)
rerf.or.jp server information
Servers Location
rerf.or.jp desktop page speed rank
Last tested: 2019-02-01
Desktop Speed
Bad
46/100
rerf.or.jp Desktop Speed Test Quick Summary
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priority - 28Leverage browser caching
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priority - 4Reduce server response time
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priority - 2Eliminate render-blocking JavaScript and CSS in above-the-fold content
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priority - 0Minify CSS
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priority - 0Minify JavaScript
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priority - 0Minify HTML
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rerf.or.jp Desktop Resource Breakdown
| Total Resources | 62 |
| Number of Hosts | 5 |
| Static Resources | 58 |
| JavaScript Resources | 8 |
| CSS Resources | 3 |
rerf.or.jp mobile page speed rank
Last tested: 2019-02-01
Mobile Speed
Bad
33/100
rerf.or.jp Mobile Speed Test Quick Summary
priority - 88Optimize images
Properly formatting and compressing images can save many bytes of data.
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Compressing https://www.rerf.or.jp/uploads/2017/03/entrance-1.jpg could save 304.8KiB (67% reduction).
Compressing https://www.rerf.or.jp/uploads/2017/03/img-slide2.jpg could save 142.6KiB (72% reduction).
Compressing https://www.rerf.or.jp/uploads/2017/03/img-slide01-2.jpg could save 105.6KiB (56% reduction).
Compressing https://www.rerf.or.jp/uploads/2017/03/img-slide3.jpg could save 70.4KiB (45% reduction).
Compressing https://www.rerf.or.jp/uploads/2017/03/img-slide1.jpg could save 68.7KiB (44% reduction).
Compressing https://www.rerf.or.jp/images/img-hiroshima-pc.jpg could save 45.2KiB (50% reduction).
Compressing https://www.rerf.or.jp/images/img-nagasaki-pc.jpg could save 32.9KiB (45% reduction).
Compressing https://www.rerf.or.jp/images/bn-top01-pc_en.jpg could save 18.6KiB (45% reduction).
Compressing https://www.rerf.or.jp/images/img-message-pc_en.jpg could save 14.4KiB (41% reduction).
Compressing https://www.rerf.or.jp/images/img-content01-pc.jpg could save 14KiB (46% reduction).
Compressing https://www.rerf.or.jp/images/img-content03-pc.jpg could save 12.8KiB (43% reduction).
Compressing https://www.rerf.or.jp/images/img-content02-pc.jpg could save 8.5KiB (37% reduction).
Compressing https://www.rerf.or.jp/images/bn-info03_en.jpg could save 4.4KiB (47% reduction).
Compressing https://www.rerf.or.jp/images/bn-info04_en.jpg could save 3.1KiB (37% reduction).
Compressing https://www.rerf.or.jp/common/images/ico-pagetop-sp-off.png could save 2.8KiB (81% reduction).
Compressing https://www.rerf.or.jp/common/images/ico-pagetop-pc-off.png could save 2.8KiB (86% reduction).
Compressing https://www.rerf.or.jp/common/images/ico-menu06-off.png could save 976B (36% reduction).
Compressing https://www.rerf.or.jp/images/ico-content01-sp.png could save 624B (27% reduction).
Compressing https://www.rerf.or.jp/common/images/site-logo-pc-foot_en.png could save 614B (11% reduction).
Compressing https://www.rerf.or.jp/common/images/ico-menu04-off.png could save 608B (32% reduction).
Compressing https://www.rerf.or.jp/common/images/btn-close02.png could save 607B (35% reduction).
Compressing https://www.rerf.or.jp/common/images/ico-menu03-off.png could save 578B (37% reduction).
Compressing https://www.rerf.or.jp/common/images/ico-fmenu07.png could save 533B (38% reduction).
Compressing https://www.rerf.or.jp/common/images/ico-menu02-off.png could save 467B (21% reduction).
Compressing https://www.rerf.or.jp/common/images/btn-close.png could save 403B (36% reduction).
Compressing https://www.rerf.or.jp/common/images/ico-menu01-off.png could save 383B (29% reduction).
Compressing https://www.rerf.or.jp/common/images/ico-fmenu02.png could save 379B (26% reduction).
Compressing https://www.rerf.or.jp/common/images/ico-menu05-off.png could save 344B (37% reduction).
Compressing https://www.rerf.or.jp/common/images/ico-search-off.png could save 301B (27% reduction).
Compressing https://www.rerf.or.jp/common/images/btn-menu.png could save 278B (34% reduction).
Compressing https://www.rerf.or.jp/images/ico-bn01-sp.png could save 267B (12% reduction).
Compressing https://www.rerf.or.jp/common/images/ico-fmenu04.png could save 264B (23% reduction).
Compressing https://www.rerf.or.jp/images/ico-bn02-sp.png could save 249B (17% reduction).
Compressing https://www.rerf.or.jp/images/ico-bn03-sp.png could save 223B (18% reduction).
Compressing https://www.rerf.or.jp/common/images/ico-arrow02.png could save 200B (50% reduction).
Compressing https://www.rerf.or.jp/common/images/ico-fmenu01.png could save 200B (26% reduction).
Compressing https://www.rerf.or.jp/common/images/ico-facebook02.png could save 183B (48% reduction).
Compressing https://www.rerf.or.jp/common/images/ico-arrow02-wh.png could save 142B (37% reduction).
Compressing https://www.rerf.or.jp/common/images/ico-arrow01.png could save 132B (41% reduction).
Compressing https://www.rerf.or.jp/common/images/ico-plus.png could save 127B (53% reduction).
Compressing https://www.rerf.or.jp/uploads/2017/03/img-slide2.jpg could save 142.6KiB (72% reduction).
Compressing https://www.rerf.or.jp/uploads/2017/03/img-slide01-2.jpg could save 105.6KiB (56% reduction).
Compressing https://www.rerf.or.jp/uploads/2017/03/img-slide3.jpg could save 70.4KiB (45% reduction).
Compressing https://www.rerf.or.jp/uploads/2017/03/img-slide1.jpg could save 68.7KiB (44% reduction).
Compressing https://www.rerf.or.jp/images/img-hiroshima-pc.jpg could save 45.2KiB (50% reduction).
Compressing https://www.rerf.or.jp/images/img-nagasaki-pc.jpg could save 32.9KiB (45% reduction).
Compressing https://www.rerf.or.jp/images/bn-top01-pc_en.jpg could save 18.6KiB (45% reduction).
Compressing https://www.rerf.or.jp/images/img-message-pc_en.jpg could save 14.4KiB (41% reduction).
Compressing https://www.rerf.or.jp/images/img-content01-pc.jpg could save 14KiB (46% reduction).
Compressing https://www.rerf.or.jp/images/img-content03-pc.jpg could save 12.8KiB (43% reduction).
Compressing https://www.rerf.or.jp/images/img-content02-pc.jpg could save 8.5KiB (37% reduction).
Compressing https://www.rerf.or.jp/images/bn-info03_en.jpg could save 4.4KiB (47% reduction).
Compressing https://www.rerf.or.jp/images/bn-info04_en.jpg could save 3.1KiB (37% reduction).
Compressing https://www.rerf.or.jp/common/images/ico-pagetop-sp-off.png could save 2.8KiB (81% reduction).
Compressing https://www.rerf.or.jp/common/images/ico-pagetop-pc-off.png could save 2.8KiB (86% reduction).
Compressing https://www.rerf.or.jp/common/images/ico-menu06-off.png could save 976B (36% reduction).
Compressing https://www.rerf.or.jp/images/ico-content01-sp.png could save 624B (27% reduction).
Compressing https://www.rerf.or.jp/common/images/site-logo-pc-foot_en.png could save 614B (11% reduction).
Compressing https://www.rerf.or.jp/common/images/ico-menu04-off.png could save 608B (32% reduction).
Compressing https://www.rerf.or.jp/common/images/btn-close02.png could save 607B (35% reduction).
Compressing https://www.rerf.or.jp/common/images/ico-menu03-off.png could save 578B (37% reduction).
Compressing https://www.rerf.or.jp/common/images/ico-fmenu07.png could save 533B (38% reduction).
Compressing https://www.rerf.or.jp/common/images/ico-menu02-off.png could save 467B (21% reduction).
Compressing https://www.rerf.or.jp/common/images/btn-close.png could save 403B (36% reduction).
Compressing https://www.rerf.or.jp/common/images/ico-menu01-off.png could save 383B (29% reduction).
Compressing https://www.rerf.or.jp/common/images/ico-fmenu02.png could save 379B (26% reduction).
Compressing https://www.rerf.or.jp/common/images/ico-menu05-off.png could save 344B (37% reduction).
Compressing https://www.rerf.or.jp/common/images/ico-search-off.png could save 301B (27% reduction).
Compressing https://www.rerf.or.jp/common/images/btn-menu.png could save 278B (34% reduction).
Compressing https://www.rerf.or.jp/images/ico-bn01-sp.png could save 267B (12% reduction).
Compressing https://www.rerf.or.jp/common/images/ico-fmenu04.png could save 264B (23% reduction).
Compressing https://www.rerf.or.jp/images/ico-bn02-sp.png could save 249B (17% reduction).
Compressing https://www.rerf.or.jp/images/ico-bn03-sp.png could save 223B (18% reduction).
Compressing https://www.rerf.or.jp/common/images/ico-arrow02.png could save 200B (50% reduction).
Compressing https://www.rerf.or.jp/common/images/ico-fmenu01.png could save 200B (26% reduction).
Compressing https://www.rerf.or.jp/common/images/ico-facebook02.png could save 183B (48% reduction).
Compressing https://www.rerf.or.jp/common/images/ico-arrow02-wh.png could save 142B (37% reduction).
Compressing https://www.rerf.or.jp/common/images/ico-arrow01.png could save 132B (41% reduction).
Compressing https://www.rerf.or.jp/common/images/ico-plus.png could save 127B (53% reduction).
priority - 47Leverage browser caching
Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.
Leverage browser caching for the following cacheable resources:
https://www.rerf.or.jp/common/css/style.css (expiration not specified)
https://www.rerf.or.jp/common/images/bg01.png (expiration not specified)
https://www.rerf.or.jp/common/images/btn-close.png (expiration not specified)
https://www.rerf.or.jp/common/images/btn-close02.png (expiration not specified)
https://www.rerf.or.jp/common/images/btn-menu.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-arrow01.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-arrow02-wh.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-arrow02.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-facebook-off.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-facebook02.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-fmenu01.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-fmenu02.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-fmenu03.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-fmenu04.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-fmenu07.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-menu01-off.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-menu02-off.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-menu03-off.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-menu04-off.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-menu05-off.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-menu06-off.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-pagetop-pc-off.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-pagetop-sp-off.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-plus.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-search-off.png (expiration not specified)
https://www.rerf.or.jp/common/images/site-logo-pc-foot_en.png (expiration not specified)
https://www.rerf.or.jp/common/images/site-logo-pc_en.png (expiration not specified)
https://www.rerf.or.jp/common/js/jquery.bxslider/images/bx_loader.gif (expiration not specified)
https://www.rerf.or.jp/common/js/jquery.bxslider/jquery.bxslider.min.css (expiration not specified)
https://www.rerf.or.jp/common/js/jquery.bxslider/jquery.bxslider.min.js (expiration not specified)
https://www.rerf.or.jp/common/js/jquery.tile.js (expiration not specified)
https://www.rerf.or.jp/common/js/scripts.js (expiration not specified)
https://www.rerf.or.jp/css/style.css (expiration not specified)
https://www.rerf.or.jp/images/bn-info03_en.jpg (expiration not specified)
https://www.rerf.or.jp/images/bn-info04_en.jpg (expiration not specified)
https://www.rerf.or.jp/images/bn-top01-pc_en.jpg (expiration not specified)
https://www.rerf.or.jp/images/ico-bn01-sp.png (expiration not specified)
https://www.rerf.or.jp/images/ico-bn02-sp.png (expiration not specified)
https://www.rerf.or.jp/images/ico-bn03-sp.png (expiration not specified)
https://www.rerf.or.jp/images/ico-content01-sp.png (expiration not specified)
https://www.rerf.or.jp/images/ico-content02-sp.png (expiration not specified)
https://www.rerf.or.jp/images/ico-content03-sp.png (expiration not specified)
https://www.rerf.or.jp/images/ico-content04-sp.png (expiration not specified)
https://www.rerf.or.jp/images/ico-content05-sp.png (expiration not specified)
https://www.rerf.or.jp/images/ico-content06-sp.png (expiration not specified)
https://www.rerf.or.jp/images/ico-content07-sp.png (expiration not specified)
https://www.rerf.or.jp/images/ico-content08-sp.png (expiration not specified)
https://www.rerf.or.jp/images/ico-content09-sp.png (expiration not specified)
https://www.rerf.or.jp/images/img-content01-pc.jpg (expiration not specified)
https://www.rerf.or.jp/images/img-content02-pc.jpg (expiration not specified)
https://www.rerf.or.jp/images/img-content03-pc.jpg (expiration not specified)
https://www.rerf.or.jp/images/img-hiroshima-pc.jpg (expiration not specified)
https://www.rerf.or.jp/images/img-message-pc_en.jpg (expiration not specified)
https://www.rerf.or.jp/images/img-nagasaki-pc.jpg (expiration not specified)
https://www.rerf.or.jp/js/scripts.js (expiration not specified)
https://www.rerf.or.jp/uploads/2017/03/entrance-1.jpg (expiration not specified)
https://www.rerf.or.jp/uploads/2017/03/img-slide01-2.jpg (expiration not specified)
https://www.rerf.or.jp/uploads/2017/03/img-slide1.jpg (expiration not specified)
https://www.rerf.or.jp/uploads/2017/03/img-slide2.jpg (expiration not specified)
https://www.rerf.or.jp/uploads/2017/03/img-slide3.jpg (expiration not specified)
https://www.googletagmanager.com/gtag/js?id=UA-97498850-1 (15 minutes)
https://www.googletagmanager.com/gtm.js?id=GTM-NNZRL6N (15 minutes)
https://www.google-analytics.com/analytics.js (2 hours)
https://www.rerf.or.jp/common/images/bg01.png (expiration not specified)
https://www.rerf.or.jp/common/images/btn-close.png (expiration not specified)
https://www.rerf.or.jp/common/images/btn-close02.png (expiration not specified)
https://www.rerf.or.jp/common/images/btn-menu.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-arrow01.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-arrow02-wh.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-arrow02.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-facebook-off.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-facebook02.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-fmenu01.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-fmenu02.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-fmenu03.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-fmenu04.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-fmenu07.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-menu01-off.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-menu02-off.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-menu03-off.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-menu04-off.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-menu05-off.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-menu06-off.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-pagetop-pc-off.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-pagetop-sp-off.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-plus.png (expiration not specified)
https://www.rerf.or.jp/common/images/ico-search-off.png (expiration not specified)
https://www.rerf.or.jp/common/images/site-logo-pc-foot_en.png (expiration not specified)
https://www.rerf.or.jp/common/images/site-logo-pc_en.png (expiration not specified)
https://www.rerf.or.jp/common/js/jquery.bxslider/images/bx_loader.gif (expiration not specified)
https://www.rerf.or.jp/common/js/jquery.bxslider/jquery.bxslider.min.css (expiration not specified)
https://www.rerf.or.jp/common/js/jquery.bxslider/jquery.bxslider.min.js (expiration not specified)
https://www.rerf.or.jp/common/js/jquery.tile.js (expiration not specified)
https://www.rerf.or.jp/common/js/scripts.js (expiration not specified)
https://www.rerf.or.jp/css/style.css (expiration not specified)
https://www.rerf.or.jp/images/bn-info03_en.jpg (expiration not specified)
https://www.rerf.or.jp/images/bn-info04_en.jpg (expiration not specified)
https://www.rerf.or.jp/images/bn-top01-pc_en.jpg (expiration not specified)
https://www.rerf.or.jp/images/ico-bn01-sp.png (expiration not specified)
https://www.rerf.or.jp/images/ico-bn02-sp.png (expiration not specified)
https://www.rerf.or.jp/images/ico-bn03-sp.png (expiration not specified)
https://www.rerf.or.jp/images/ico-content01-sp.png (expiration not specified)
https://www.rerf.or.jp/images/ico-content02-sp.png (expiration not specified)
https://www.rerf.or.jp/images/ico-content03-sp.png (expiration not specified)
https://www.rerf.or.jp/images/ico-content04-sp.png (expiration not specified)
https://www.rerf.or.jp/images/ico-content05-sp.png (expiration not specified)
https://www.rerf.or.jp/images/ico-content06-sp.png (expiration not specified)
https://www.rerf.or.jp/images/ico-content07-sp.png (expiration not specified)
https://www.rerf.or.jp/images/ico-content08-sp.png (expiration not specified)
https://www.rerf.or.jp/images/ico-content09-sp.png (expiration not specified)
https://www.rerf.or.jp/images/img-content01-pc.jpg (expiration not specified)
https://www.rerf.or.jp/images/img-content02-pc.jpg (expiration not specified)
https://www.rerf.or.jp/images/img-content03-pc.jpg (expiration not specified)
https://www.rerf.or.jp/images/img-hiroshima-pc.jpg (expiration not specified)
https://www.rerf.or.jp/images/img-message-pc_en.jpg (expiration not specified)
https://www.rerf.or.jp/images/img-nagasaki-pc.jpg (expiration not specified)
https://www.rerf.or.jp/js/scripts.js (expiration not specified)
https://www.rerf.or.jp/uploads/2017/03/entrance-1.jpg (expiration not specified)
https://www.rerf.or.jp/uploads/2017/03/img-slide01-2.jpg (expiration not specified)
https://www.rerf.or.jp/uploads/2017/03/img-slide1.jpg (expiration not specified)
https://www.rerf.or.jp/uploads/2017/03/img-slide2.jpg (expiration not specified)
https://www.rerf.or.jp/uploads/2017/03/img-slide3.jpg (expiration not specified)
https://www.googletagmanager.com/gtag/js?id=UA-97498850-1 (15 minutes)
https://www.googletagmanager.com/gtm.js?id=GTM-NNZRL6N (15 minutes)
https://www.google-analytics.com/analytics.js (2 hours)
priority - 40Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 3 blocking script resources and 3 blocking CSS resources. This causes a delay in rendering your page.
Remove render-blocking JavaScript:
https://code.jquery.com/jquery-2.2.4.min.js
https://www.rerf.or.jp/common/js/jquery.bxslider/jquery.bxslider.min.js
https://www.rerf.or.jp/common/js/jquery.tile.js
https://www.rerf.or.jp/common/js/jquery.bxslider/jquery.bxslider.min.js
https://www.rerf.or.jp/common/js/jquery.tile.js
Optimize CSS Delivery of the following:
https://www.rerf.or.jp/common/js/jquery.bxslider/jquery.bxslider.min.css
https://www.rerf.or.jp/common/css/style.css
https://www.rerf.or.jp/css/style.css
https://www.rerf.or.jp/common/css/style.css
https://www.rerf.or.jp/css/style.css
priority - 34Avoid landing page redirects
Your page has 2 redirects. Redirects introduce additional delays before the page can be loaded.
Avoid landing page redirects for the following chain of redirected URLs.
http://rerf.or.jp/
https://rerf.or.jp/
https://www.rerf.or.jp/en/
https://rerf.or.jp/
https://www.rerf.or.jp/en/
priority - 7Reduce server response time
In our test, your server responded in 0.28 seconds.
priority - 0Minify CSS
Compacting CSS code can save many bytes of data and speed up download and parse times.
Minify CSS for the following resources to reduce their size by 2.7KiB (27% reduction).
Minifying https://www.rerf.or.jp/common/css/style.css could save 2.2KiB (33% reduction) after compression.
Minifying https://www.rerf.or.jp/css/style.css could save 516B (16% reduction) after compression.
Minifying https://www.rerf.or.jp/css/style.css could save 516B (16% reduction) after compression.
priority - 0Minify JavaScript
Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.
Minify JavaScript for the following resources to reduce their size by 574B (25% reduction).
Minifying https://www.rerf.or.jp/common/js/scripts.js could save 343B (19% reduction) after compression.
Minifying https://www.rerf.or.jp/common/js/jquery.tile.js could save 231B (48% reduction) after compression.
Minifying https://www.rerf.or.jp/common/js/jquery.tile.js could save 231B (48% reduction) after compression.
priority - 0Minify HTML
Compacting HTML code, including any inline JavaScript and CSS contained in it, can save many bytes of data and speed up download and parse times.
Minify HTML for the following resources to reduce their size by 565B (11% reduction).
Minifying https://www.rerf.or.jp/en/ could save 565B (11% reduction) after compression.
rerf.or.jp Mobile Resource Breakdown
| Total Resources | 68 |
| Number of Hosts | 5 |
| Static Resources | 64 |
| JavaScript Resources | 8 |
| CSS Resources | 3 |
rerf.or.jp mobile page usability
Last tested: 2019-02-01
Mobile Usability
Good
100/100
rerf.or.jp HTML validation
Warnings
Consider avoiding viewport values that prevent users from resizing documents.
Line: 24 Column: 2 - 127
"..."UTF-8"> <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0"> <met..."
"..."UTF-8"> <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0"> <met..."
The “banner” role is unnecessary for element “header”.
Line: 54 Column: 2 - 43
"...t) --> <header class="site-header" role="banner"> <di..."
"...t) --> <header class="site-header" role="banner"> <di..."
The “navigation” role is unnecessary for element “nav”.
Line: 57 Column: 4 - 50
"...す。</p> <nav class="header-sub-menu" role="navigation"> <..." Line: 71 Column: 4 - 50
"...nu --> <nav class="site-navigation" role="navigation"> <..." Line: 379 Column: 5 - 53
"...ner"> <nav class="footer-navigation" role="navigation"> ..." Line: 441 Column: 4 - 56
"...wrap"> <nav class="footer-sub-navigation" role="navigation"> <..."
"...す。</p> <nav class="header-sub-menu" role="navigation"> <..." Line: 71 Column: 4 - 50
"...nu --> <nav class="site-navigation" role="navigation"> <..." Line: 379 Column: 5 - 53
"...ner"> <nav class="footer-navigation" role="navigation"> ..." Line: 441 Column: 4 - 56
"...wrap"> <nav class="footer-sub-navigation" role="navigation"> <..."
The first occurrence of ID “cse-search-box” was here.
Line: 78 Column: 5 - 66
"...12"> <form action="https://www.google.com/cse" id="cse-search-box"> ..."
"...12"> <form action="https://www.google.com/cse" id="cse-search-box"> ..."
The “main” role is unnecessary for element “main”.
Line: 187 Column: 3 - 38
"...ap --> <main class="site-main" role="main"> <s..."
"...ap --> <main class="site-main" role="main"> <s..."
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Line: 346 Column: 1 - 28
"...t-box --> <section class="banner-box"> <!-- ..."
"...t-box --> <section class="banner-box"> <!-- ..."
The “contentinfo” role is unnecessary for element “footer”.
Line: 373 Column: 2 - 48
"...ts --> <footer class="site-footer" role="contentinfo"> <di..."
"...ts --> <footer class="site-footer" role="contentinfo"> <di..."
Errors
Duplicate ID “cse-search-box”.
Line: 156 Column: 5 - 66
"...er"> <form action="https://www.google.com/cse" id="cse-search-box"> ..."
"...er"> <form action="https://www.google.com/cse" id="cse-search-box"> ..."
The text content of element “time” was not in the required format: The literal did not satisfy the time-datetime format.
Line: 196 Column: 24 - 30
"...>2019年7月5日</time> ..." Line: 201 Column: 24 - 30
"...>2019年7月2日</time> ..." Line: 206 Column: 25 - 31
"...2019年6月25日</time> ..." Line: 211 Column: 25 - 31
"...2019年5月15日</time> ..." Line: 216 Column: 24 - 30
"...>2019年5月7日</time> ..."
"...>2019年7月5日</time> ..." Line: 201 Column: 24 - 30
"...>2019年7月2日</time> ..." Line: 206 Column: 25 - 31
"...2019年6月25日</time> ..." Line: 211 Column: 25 - 31
"...2019年5月15日</time> ..." Line: 216 Column: 24 - 30
"...>2019年5月7日</time> ..."
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rerf.or.jp Ping
Ping is a computer network administration software utility used to test the reachability of a host on an Internet Protocol (IP) network. It measures the round-trip time for messages sent from the originating host to a destination computer that are echoed back to the source.
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Traceroute is a computer network diagnostic tool for displaying the route (path) and measuring transit delays of packets across an Internet Protocol (IP) network. The history of the route is recorded as the round-trip times of the packets received from each successive host (remote node) in the route (path); the sum of the mean times in each hop is a measure of the total time spent to establish the connection. Traceroute proceeds unless all (three) sent packets are lost more than twice, then the connection is lost and the route cannot be evaluated.