Britannica.co.jp ブリタニカ・ジャパン｜百科事典のブリタニカ

「ブリタニカ国際大百科事典」をベースにした各種デジタル商品、オンラインサービス、ブリタニカ国際年鑑、総合学習、英語教育の紹介。

Britannica.co.jp Quick Summary

Status

Offline

Server IP address resolved: No

Http response code: None

Last Checked: 08/23/2025

Britannica.co.jp traffic estimate is about 146 unique visitors and 146 pageviews per day. The approximated value of britannica.co.jp is 0 USD. Every unique visitor makes about 1 pageviews on average.

Alexa Traffic Rank estimates that britannica.co.jp is ranked number 46,204 in the world.

Britannica.co.jp is registered under .JP top-level domain. Check other websites in .JP zone.

During the last check (August 11, 2024) britannica.co.jp has an expired SSL certificate issued by Amazon (expired on February 25, 2025), please click the “Refresh” button for SSL Information at the Safety Information section. Check other websites using SSL certificates issued by Amazon.

In accordance with Google Safe Browsing, Google Safe Search, Symantec and Web of Trust britannica.co.jp is pretty a safe domain.

Relying on Google Mobile-Friendly test britannica.co.jp is well optimized for mobile and tablet devices, however website page loading time may be improved.

Britannica.co.jp General Information

Britannica.co.jp Audience Geography

Where are website visitors coming from?

Country	Visitors

Britannica.co.jp Traffic Distribution

Where do visitors go on britannica.co.jp?

Subdomain	Pageviews

Britannica.co.jp Popularity

How popular is britannica.co.jp?

Period	Global Rank	Global Rank Delta
past 3 months	4703082	3171422
past month	2355489	0
past week	1184663	-612891

Days	Pageviews Rank	Pageviews Rank Delta	Pageviews per Million	Pageviews per Million Delta	Pageviews per User	Pageviews per User Delta
90	5532090	4146850	0	-90.945%	1	-66.667%
30	2819157	0	0	0%	1	0%
7	1367095	-516519	1	200%	1	0%

Days	Reach Rank	Reach Rank Delta	Reach per Million	Reach per Million Delta
90	4219047	2499812	5	-72.941%
30	2056587	0	2	0%
7	1049627	-656958	5	200%

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Britannica.co.jp Safety Information

Rankchart Summary

Safe

Updated: 08/23/2025

We gather website safety and reputation data and compare it with available third-party sources so we calculate own safety and trustworthiness rate based on information that we get.

Norton Connect Safe

Safe

Updated: 02/20/2025

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Norton ConnectSafe evaluates websites for any unsafe and inapropriate content. The results are important for families with young children.

Google Safe Search

Safe

Updated: 09/24/2019

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SafeSearch works as a parental control tool to filter out any content that might be inappropriate for your children.

Google Safe Browsing

Safe

Malware not found

Phishing not detected

Unwanted software not found

Harmfull applications not found

Updated: 01/09/2019

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Google Safe Browsing notifies when websites are compromised by malicious actors. These protections work across Google products and provide a safer online experience.

McAfee® WebAdvisor

Safe

Updated: 03/03/2021

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McAfee assesses britannica.co.jp for a meaningful set of security threats. Featured dangers from annoying pop-ups to hidden Trojans, that can steal your identity, will be revealed. McAfee does not analyze britannica.co.jp for mature or inappropriate content, only security checks are evaluated.

Web of Trust

Child safety is very good

Updated: 01/12/2019

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The WOT calculates reputation of the britannica.co.jp. This reputation system receives ratings from users and information from third-party sources, assesses the britannica.co.jp for safety features and confirms, whether britannica.co.jp is suitable for children.

Britannica.co.jp SSL Information

Information about SSL/TLS certificates

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Domain	britannica.co.jp
Issuer Organization	Amazon
Issuer	Amazon RSA 2048 M02
Algorithm	RSA-SHA256
Valid form	01/28/2024
Expiration	02/25/2025
Signed	Certificate is not self signed
Additional Domains	britannica.co.jp *.britannica.co.jp

SSL Checker

Britannica.co.jp Server Information

Britannica.co.jp Server Location

Where website hosting server is located?

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Britannica.co.jp ASN Information

Information about IP address owner

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ASN ID: 16509

ASN Title: AMAZON-02 - Amazon.com, Inc., US

Updated: 12/24/2024

Raw ASN data:

Geolocation

ASN Lookup

Britannica.co.jp Domain Name Information

Britannica.co.jp DNS Information

Domain name service records

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A

Host	A Record	TTL

Britannica.co.jp Whois Information

Information about registered users or assignees of an Internet resource

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Raw WHOIS data:

Whois

DNS Lookup

Britannica.co.jp HTML Validation

Britannica.co.jp W3C HTML Markup Validation

HTML markup errors and warnings

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Errors:

A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.

An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.

Warnings:

Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.

Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.

HTML Validator

Britannica.co.jp Desktop Performance

How Well Britannica.co.jp Performs On Desktops?

Website desktop performance and usability tips

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Speed

77%

Leverage browser caching

Eliminate render-blocking JavaScript and CSS in above-the-fold content

Enable compression

Optimize images

Minify CSS

Minify JavaScript

Minify HTML

Updated: 02/16/2016

Britannica.co.jp Mobile Performance

How Optimized Is Britannica.co.jp for Mobile Devices?

Tips on speeding up mobile site performance

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Usability

99%

Size tap targets appropriately

Updated: 12/17/2019

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Total Resources	33
Number of Hosts	5
Static Resources	30
JavaScript Resources	6
CSS Resources	5

CSS	26.7 KBytes
Images	636.3 KBytes
HTML	13.4 KBytes
JavaScript	146.8 KBytes
Other	35.9 KBytes

Total Resources	36
Number of Hosts	7
Static Resources	29
JavaScript Resources	6
CSS Resources	5

CSS	26.0 KBytes
Images	3.5 MBytes
HTML	11.9 KBytes
JavaScript	165.0 KBytes
Other	19.9 KBytes