Seasar.org The Seasar Project

私たちSeasarプロジェクトはオープンソースという仕組みの元、開発者のゆとりを実現できるプロダクトの開発と提供を通じて、ユーザと開発者とが共に喜びを分かち合える環境実現をお手伝いすることを目指し活動しています。

Seasar.org Quick Summary

Status

Online

Server IP address resolved: Yes

Http response code: 200

Response time: 1.01 sec.

Last Checked: 08/19/2025

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Seasar.org traffic estimate is about 478 unique visitors and 478 pageviews per day. The approximated value of seasar.org is 2,920 USD. Every unique visitor makes about 1 pageviews on average.

Alexa Traffic Rank estimates that seasar.org is ranked number 21,252 in the world.

Seasar.org server is located in Japan, but, unfortunately, we cannot identify the countries where the visitors come from and thus it’s impossible to define if the distance can potentially affect the page load time. See the list of other websites hosted by HOSEI-NET Hosei University, JP.

Seasar.org is registered under .ORG top-level domain. Check other websites in .ORG zone.

During the last check (April 03, 2023) seasar.org has an expired SSL certificate issued by Let's Encrypt (expired on May 24, 2023), please click the “Refresh” button for SSL Information at the Safety Information section. Check other websites using SSL certificates issued by Let's Encrypt.

In accordance with Google Safe Browsing, Google Safe Search and Symantec seasar.org is pretty a safe domain.

Relying on Google Mobile-Friendly test seasar.org isn't optimized for mobile and tablet devices. Designing your websites to be mobile friendly ensures that your pages perform well on all devices.

Seasar.org General Information

Seasar.org Audience Geography

Where are website visitors coming from?

Country	Visitors

Seasar.org Traffic Distribution

Where do visitors go on seasar.org?

Subdomain	Pageviews

Seasar.org Popularity

How popular is seasar.org?

Period	Global Rank	Global Rank Delta
past 3 months	1444891	1062907
past month	5147858	3518783
past week	3860630	0

Days	Pageviews Rank	Pageviews Rank Delta	Pageviews per Million	Pageviews per Million Delta	Pageviews per User	Pageviews per User Delta
90	2191848	1724363	1	-88.595%	1	-49.756%
30	6121360	3801170	0	-83.621%	1	-4.762%
7	4090048	0	0	0%	1	0%

Days	Reach Rank	Reach Rank Delta	Reach per Million	Reach per Million Delta
90	1179321	808033	3	-77.196%
30	4504780	3137242	5	-82.727%
7	3745018	0	6	0%

Press rescan to collect fresh statistics for this website...

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Seasar.org Safety Information

Rankchart Summary

Safe

Updated: 08/19/2025

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: 03/24/2025

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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: 10/27/2016

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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: 02/23/2021

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McAfee assesses seasar.org 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 seasar.org for mature or inappropriate content, only security checks are evaluated.

Web of Trust

Not Checked

Updated: 08/19/2025

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

Seasar.org SSL Information

Information about SSL/TLS certificates

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Domain	seasar.org
Issuer Organization	Let's Encrypt
Issuer	R3
Algorithm	RSA-SHA256
Valid form	02/23/2023
Expiration	05/24/2023
Signed	Certificate is not self signed
Additional Domains	*.seasar.org seasar.org

SSL Checker

Seasar.org Server Information

Seasar.org Server Location

Where website hosting server is located?

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Seasar.org ASN Information

Information about IP address owner

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ASN ID: 55379

ASN Title: HOSEI-NET Hosei University, JP

Updated: 04/22/2025

Raw ASN data:

Geolocation

ASN Lookup

Seasar.org Domain Name Information

Seasar.org DNS Information

Domain name service records

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Host	A Record	TTL
seasar.org	133.25.90.134	900

Host	MX Record	Priority	TTL
seasar.org	mx02.seasar.org	10	900
seasar.org	mx01.seasar.org	20	900

Host	NS Record	TTL
seasar.org	ns02.seasar.org	900
seasar.org	ns01.seasar.org	900

Seasar.org Whois Information

Information about registered users or assignees of an Internet resource

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Raw WHOIS data:

Domain Name: seasar.org
Registry Domain ID: dd3ac2b9315a4b0090b1d3aa7f8aa2c7-LROR
Registrar WHOIS Server: http://whois.discount-domain.com
Registrar URL: http://www.onamae.com
Updated Date: 2024-06-16T06:51:22Z
Creation Date: 2003-07-28T09:57:55Z
Registry Expiry Date: 2025-07-28T09:57:55Z
Registrar: GMO Internet Group, Inc. d/b/a Onamae.com
Registrar IANA ID: 49
Registrar Abuse Contact Email: abuse@gmo.jp
Registrar Abuse Contact Phone: +81.337709199
Domain Status: ok https://icann.org/epp#ok
Registry Registrant ID: REDACTED FOR PRIVACY
Registrant Name: REDACTED FOR PRIVACY
Registrant Organization: The Seasar Foundation
Registrant Street: REDACTED FOR PRIVACY
Registrant City: REDACTED FOR PRIVACY
Registrant State/Province: Tokyo
Registrant Postal Code: REDACTED FOR PRIVACY
Registrant Country: JP
Registrant Phone: REDACTED FOR PRIVACY
Registrant Phone Ext: REDACTED FOR PRIVACY
Registrant Fax: REDACTED FOR PRIVACY
Registrant Fax Ext: REDACTED FOR PRIVACY
Registrant Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
Registry Admin ID: REDACTED FOR PRIVACY
Admin Name: REDACTED FOR PRIVACY
Admin Organization: REDACTED FOR PRIVACY
Admin Street: REDACTED FOR PRIVACY
Admin City: REDACTED FOR PRIVACY
Admin State/Province: REDACTED FOR PRIVACY
Admin Postal Code: REDACTED FOR PRIVACY
Admin Country: REDACTED FOR PRIVACY
Admin Phone: REDACTED FOR PRIVACY
Admin Phone Ext: REDACTED FOR PRIVACY
Admin Fax: REDACTED FOR PRIVACY
Admin Fax Ext: REDACTED FOR PRIVACY
Admin Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
Registry Tech ID: REDACTED FOR PRIVACY
Tech Name: REDACTED FOR PRIVACY
Tech Organization: REDACTED FOR PRIVACY
Tech Street: REDACTED FOR PRIVACY
Tech City: REDACTED FOR PRIVACY
Tech State/Province: REDACTED FOR PRIVACY
Tech Postal Code: REDACTED FOR PRIVACY
Tech Country: REDACTED FOR PRIVACY
Tech Phone: REDACTED FOR PRIVACY
Tech Phone Ext: REDACTED FOR PRIVACY
Tech Fax: REDACTED FOR PRIVACY
Tech Fax Ext: REDACTED FOR PRIVACY
Tech Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
Name Server: ns01.seasar.org
Name Server: ns02.seasar.org
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of WHOIS database: 2024-10-18T21:22:44Z

Whois

DNS Lookup

Seasar.org HTML Validation

Seasar.org W3C HTML Markup Validation

HTML markup errors and warnings

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Errors:

Saw “<?”. Probable cause: Attempt to use an XML processing instruction in HTML. (XML processing instructions are not supported in HTML.)

Obsolete doctype. Expected “<!DOCTYPE html>”.

Using the “meta” element to specify the document-wide default language is obsolete. Consider specifying the language on the root element instead.

Bad value “Content-Style-Type” for attribute “http-equiv” on element “meta”.

Bad value “screen,projection” for attribute “media” on element “link”: Deprecated media type “projection”. For guidance, see the Media Types section in the current Media Queries specification.

Attribute “alt” not allowed on element “a” at this point.

Stray end tag “a”.

The “width” attribute on the “col” element is obsolete. Use CSS instead.

The “valign” attribute on the “col” element is obsolete. Use CSS instead.

The “align” attribute on the “col” element is obsolete. Use CSS instead.

Warnings:

The “name” attribute is obsolete. Consider putting an “id” attribute on the nearest container instead.

HTML Validator

Seasar.org Desktop Performance

How Well Seasar.org Performs On Desktops?

Website desktop performance and usability tips

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Speed

87%

Leverage browser caching

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

Optimize images

Minify HTML

Updated: 09/19/2015

Seasar.org Mobile Performance

How Optimized Is Seasar.org for Mobile Devices?

Tips on speeding up mobile site performance

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Usability

59%

Use legible font sizes

Size tap targets appropriately

Configure the viewport

Updated: 06/28/2019

Seasar.org Nearest Competitors

Estimated Nearest Competitors Of Seasar.org

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Seasar.org URL Typos

Most common user URL mistypes for seasar.org

www.seasar.com
www.seasar.net
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Total Resources	15
Number of Hosts	2
Static Resources	13
CSS Resources	4

CSS	6.9 KBytes
Images	28.5 KBytes
HTML	36.5 KBytes
Other	382.0 Bytes

Total Resources	15
Number of Hosts	2
Static Resources	13
CSS Resources	4

CSS	7.0 KBytes
Images	28.8 KBytes
HTML	37.9 KBytes
Other	417.0 Bytes