Kobun.co.jp 光文書院｜小学校テスト・ドリル・デジタル教材・校務支援

光文書院は，小学校（小学生）対象に国語・算数・理科・社会・家庭科などのテストやくりかえし漢字ドリル・計算ドリルなどの図書教材の発行，さんすうせっとなどの教具の制作，デジタル教材や校務支援ソフトなどの教育ICT事業を展開しています。

Kobun.co.jp Overview

Kobun.co.jp ranking shows that the page is at position 628,974 over the world.

Kobun.co.jp hosting company servers are placed in the Japan, but, unfortunately, it’s not possible to identify the countries where the bulk of kobun.co.jp users come from and, therefore, we couldn’t define if the distance can influence the webpage load time. See the list of other webpages hosted on AMAZON-02 - Amazon.com, Inc., US servers.

In terms of rank-to-traffic ratio, kobun.co.jp has 577 unique users per day, viewing 1,153 pages. The rank based value of kobun.co.jp is 9,461 USD. Every user makes 2.16 pageviews on average.

Kobun.co.jp boasts a link base consisting of 219 referring domains and 245 external backlinks, as revealed by the data obtained from web network scanning.

Kobun.co.jp top-level domain belongs to .JP domain zone. Check other webpages in .JP zone.

According the last verification test in August 08, 2024, kobun.co.jp has an expired wildcard SSL certificate issued by Cybertrust Japan Co., Ltd. (expired on February 12, 2023). Click button “Update” SSL Information at the Safety Information section. Check the list of websites using SSL by Cybertrust Japan Co., Ltd..

Based on data from Google Safe Browsing, Google Safe Search, Symantec and Web of Trust kobun.co.jp is a fairly safe domain.

According the Mobile-Friendly test by Google kobun.co.jp is nice optimized for mobile devices and tablets, however the webpage speed could be improved.

Kobun.co.jp Rank Summary

Global Rank

628,974

Average Load Time

0.55sec

Links In Count

Website Value

$8,760

Audience Geography. Where are kobun.co.jp visitors located?

Country	Visitors

Country	Pageviews

Country	Rank

Where do visitors go on kobun.co.jp?

Subdomain	Pageviews

Subdomain	Pageviews per User

Subdomain	Reach

How popular is kobun.co.jp?

Period	Global Rank	Global Rank Delta
past 3 months	628974	0

Days	Pageviews Rank	Pageviews Rank Delta	Pageviews per Million	Pageviews per Million Delta	Pageviews per User	Pageviews per User Delta
90	707929	0	4	0%	2	0%

Days	Reach Rank	Reach Rank Delta	Reach per Million	Reach per Million Delta
90	634349	0	7	0%

Kobun.co.jp Website Safety

Overview

Last Updated: 12/28/2024

Overall result - kobun.co.jp is safe.

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

Last Updated: 03/27/2024

kobun.co.jp is safe.

Norton ConnectSafe evaluates kobun.co.jp for any unsafe and insecure content. The results are critical for families with young children.

Google Safe Search

Last Updated: 11/22/2016

kobun.co.jp is safe.

SafeSearch is used as a parental control tool to filter out any inappropriate for your children search results on your devices: phones, tablets or personal computers.

Google Safe Browsing

Last Updated: 01/09/2019

kobun.co.jp is safe.
Malware: not found.
Phishing: not detected.
Unwanted software: not found.
Harmfull applications: not found.

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

Site Advisor

Last Updated: 02/26/2021

kobun.co.jp is safe.

McAfee assesses kobun.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 kobun.co.jp for mature or inappropriate content, only security checks are evaluated.

Web of Trust

Last Updated: 01/10/2019

kobun.co.jp child safety is very good.

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

SSL Information

SSL Checker Tool

Domain	*.kobun.co.jp
Issuer Organization	Cybertrust Japan Co., Ltd.
Issuer	Cybertrust Japan SureServer CA G4
Algorithm	RSA-SHA256
Valid form	02/08/2022
Expiration	02/12/2023
Signed	Certificate is not self signed
Additional Domains	*.kobun.co.jp kobun.co.jp

Kobun.co.jp Rank History

Alexa Rank shows how popular kobun.co.jp is in comparison with other sites. The most popular site has Alexa Rank equals 1. If kobun.co.jp has Alexa Rank equals 100,000, then it is in TOP 100,000 popular sites in the world. The rank is calculated using a combination of average daily visitors to kobun.co.jp and pageviews on kobun.co.jp over the past 3 months.

Kobun.co.jp Hosting Information

Server Location

Geolocation Tool

ASN Information

ASN Lookup Tool

ASN ID: 16509

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

Last Update: 12/23/2024

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/whois_tou.html
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/whois_reporting/index.html
#
# Copyright 1997-2018, American Registry for Internet Numbers, Ltd.
#

ASNumber: 16509
ASName: AMAZON-02
ASHandle: AS16509
RegDate: 2000-05-03
Updated: 2012-03-02
Ref: https://rdap.arin.net/registry/autnum/16509

OrgName: Amazon.com, Inc.
OrgId: AMAZON-4
Address: 1918 8th Ave
City: SEATTLE
StateProv: WA
PostalCode: 98101-1244
Country: US
RegDate: 1995-01-23
Updated: 2017-01-28
Ref: https://rdap.arin.net/registry/entity/AMAZON-4

OrgAbuseHandle: AEA8-ARIN
OrgAbuseName: Amazon EC2 Abuse
OrgAbusePhone: +1-206-266-4064
OrgAbuseEmail: abuse@amazonaws.com
OrgAbuseRef: https://rdap.arin.net/registry/entity/AEA8-ARIN

OrgTechHandle: ANO24-ARIN
OrgTechName: Amazon EC2 Network Operations
OrgTechPhone: +1-206-266-4064
OrgTechEmail: amzn-noc-contact@amazon.com
OrgTechRef: https://rdap.arin.net/registry/entity/ANO24-ARIN

RTechHandle: AC6-ORG-ARIN
RTechName: Amazon-com Incorporated
RTechPhone: +1-206-266-2187
RTechEmail: ipmanagement@amazon.com
RTechRef: https://rdap.arin.net/registry/entity/AC6-ORG-ARIN

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/whois_tou.html
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/whois_reporting/index.html
#
# Copyright 1997-2018, American Registry for Internet Numbers, Ltd.
#

Kobun.co.jp Domain Registration and Settings

WHOIS

WHOIS Lookup Tool

[ 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] KOBUN.CO.JP
e. [そしきめい] かぶしきかいしゃこうぶんしょいん
f. [組織名] 株式会社光文書院
g. [Organization] KOBUNSHOIN PUBLISHING CO., LTD.
k. [組織種別] 株式会社
l. [Organization Type] corporation
m. [登録担当者] TM70505JP
n. [技術連絡担当者] HY4200JP
p. [ネームサーバ] ns1.shsvr.net
p. [ネームサーバ] ns2.shsvr.net
s. [署名鍵]
[状態] Connected (2023/03/31)
[登録年月日] 1999/03/25
[接続年月日] 1999/04/05
[最終更新] 2022/04/01 01:02:38 (JST)

DNS Records

DNS Lookup Tool

Host	A Record	TTL
kobun.co.jp	52.69.41.180	3600

Host	MX Record	Priority	TTL
kobun.co.jp	ASPMX.L.GOOGLE.COM	10	3600
kobun.co.jp	ASPMX3.GOOGLEMAIL.COM	30	3600
kobun.co.jp	ASPMX2.GOOGLEMAIL.COM	30	3600
kobun.co.jp	ALT1.ASPMX.L.GOOGLE.COM	20	3600
kobun.co.jp	ALT2.ASPMX.L.GOOGLE.COM	20	3600

Host	NS Record	TTL
kobun.co.jp	ns2.shsvr.net	86400
kobun.co.jp	ns1.shsvr.net	86400

Host	TXT Record	TTL
kobun.co.jp	sending_domain1056673=b641bde3d7258e60fec21cbb0c93a1931e6f885c91545d4b1d7d1570e31d1dc9	3600
kobun.co.jp	v=spf1 include:_spf.google.com include:amazonses.com include:spf.haihaimail.jp include:spf.smktg.jp +ip4:13.71.133.58 +ip4:210.239.65.9 +ip4:153.125.143.162 +ip4:150.249.196.56 -all	3600
kobun.co.jp	pardot1056673=a285f979fcd7c0a0bc42a5b2c6f91cec563947a01182ae93bf897e91defcae35	3600

ns1.shsvr.net
TTL: 3600
Email address: ns2.shsvr.net
Serial: 186
Refresh: 10800
Retry: 1800
Expire: 259200
Minimum: 1800

Kobun.co.jp HTML Check

HTML Validation Tool

Errors

Almost standards mode doctype. Expected “<!DOCTYPE html>”.

Bad value “/Portals/0/js/ jquery-1.8.2.min.js” for attribute “src” on element “script”: Tab, new line or carriage return found.

Text not allowed in element “ul” in this context.

Element “div” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)

The “cellspacing” attribute on the “table” element is obsolete. Use CSS instead.

The “border” attribute on the “table” element is obsolete. Use CSS instead.

Bad value “” for attribute “target” on element “a”: Browsing context name must be at least one character long.

Bad value “” for attribute “height” on element “img”: The empty string is not a valid non-negative integer.

Element “span” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)

Warnings

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

The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.

Kobun.co.jp Desktop Performance

Last tested: 04/13/2016

Desktop Speed

42%

Optimize images

Leverage browser caching

Enable compression

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

Minify JavaScript

Minify CSS

Desktop Resource Breakdown

Total Resources	106
Number of Hosts	3
Static Resources	101
JavaScript Resources	14
CSS Resources	12

Kobun.co.jp Mobile Insights

Last tested: 04/13/2016

Mobile Usability

99%

Size tap targets appropriately

Mobile Speed

29%

Optimize images

Leverage browser caching

Enable compression

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

Prioritize visible content

Minify JavaScript

Minify CSS

Mobile Resource Breakdown

Total Resources	106
Number of Hosts	3
Static Resources	101
JavaScript Resources	16
CSS Resources	16

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Kobun.co.jp 光文書院｜小学校 テスト・ドリル・デジタル教材・校務支援

Kobun.co.jp Overview

Kobun.co.jp Rank Summary

Kobun.co.jp Website Safety

Kobun.co.jp Rank History

Kobun.co.jp Hosting Information

Kobun.co.jp Domain Registration and Settings

Kobun.co.jp HTML Check

Kobun.co.jp Desktop Performance

Kobun.co.jp Mobile Insights

Kobun.co.jp Similar Audits

Kobun.co.jp Common Typos

Kobun.co.jp 光文書院｜小学校テスト・ドリル・デジタル教材・校務支援