www.textbook.or.jp
Registered
Page analyze update date:
2026/06/18 17:42:10
Last whois update date:
2026/05/27 22:16:59
Domain Status
Registered
×
![Fullscreen website screenshot]()
www.textbook.or.jp Website screenshot
SEO Score
50%
73
Score achieved
146
Maximum score
Main Information
Title: 一般社団法人 教科書協会
Description: 教科書協会が目的としている、検定教科書の質的向上と教科書発行事業の合理化に関する調査研究などの具体的内容を紹介しています。
Keywords: unknown
Page Encoding:
shift_jis
Body and server charset are different!
Page Filesize: 10 KB
Server Information
IP: 133.110.235.33
Location: Japan,JP,Yokohama,231-0841,35.4337,139.6499,Asia/Tokyo
Http Server: apache
Meta Tags List
- equiv: Content-Type content: text/html; charset=Shift_JIS
- equiv: Content-Script-Type content: text/javascript
- name: robots content: ALL
- name: Keywords content: 検定教科書,教科書発行事業,調査研究,供給事業,出版,学校教育
- name: description content: 教科書協会が目的としている、検定教科書の質的向上と教科書発行事業の合理化に関する調査研究などの具体的内容を紹介しています。
Internal Links
External Links
Whois Raw Data
[ 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:
a. [Domain Name] TEXTBOOK.OR.JP
g. [Organization] Textbook Publishers Association of Japan
l. [Organization Type] Aggregate Corporation
m. [Administrative Contact] NK39377JP
n. [Technical Contact] SM49348JP
p. [Name Server] ns006-01jblq51rgo7f17a.0.d-53.info
p. [Name Server] ns006-01jblq51rgo7f17a.0.d-53.jp
p. [Name Server] ns006-01jblq51rgo7f17a.0.d-53.net
s. [Signing Key] 51939 13 2 (
8AF145EC8942DC271BCE25CCD326F005
ACE357CC7DA15F40D0A49B6EABF5F497 )
[State] Connected (2027/01/31)
[Registered Date] 2001/01/11
[Connected Date] 2001/02/14
[Last Update] 2026/02/01 01:01:45 (JST)
SEO Audit
Technical SEO
✓
Response Code
200
Status 200 OK - page loads correctly.
!
Character Encoding
Page: shift_jis, Header:
Character encoding mismatch between HTML and HTTP headers.
✓
Page Size
11027 bytes
Page size acceptable for fast loading.
✓
Resources
35 total
Moderate number of resources. Consider combining files.
✓
Hreflang Tags
0 hreflang tags
Add hreflang tags if you have multilingual content.
!
Robots.txt
Missing
Add robots.txt file to control search engine crawling.
!
Sitemap
Not found
Add sitemap.xml and reference it in robots.txt.
✓
HTTPS
Yes
Secure HTTPS connection enabled.
✓
Compression
gzip
Gzip or Zstd compression enabled for faster loading.
!
Caching
Not set
Add cache-control headers to improve loading speed for returning visitors.
✓
Page Speed
5.05 ms
Excellent loading speed.
On-Page SEO
!
Title
一般社団法人 教科書協会
Title too short. Expand to 30-60 characters for better SEO.
!
Meta Description
教科書協会が目的としている、検定教科書の質的向上と教科書発行事業の合理化に関する調査研究などの具体的内容を紹介しています。 Lenght:61
Meta description too short. Expand to 100-160 characters.
✓
H1 Heading
1 found - ""
Good - single H1 heading found.
!
Word Count
4
Content very short. Aim for at least 500 words for better SEO.
!
Canonical Tag
Add canonical tag to prevent duplicate content issues.
✓
Duplicate Meta
[]
No duplicate meta tags found.
✓
Keywords
Meta keywords are optional (not used by major search engines).
Content and UX
✓
Language
ja
Language attribute properly set.
✓
Images
28 total, 0 missing ALT
All images have proper ALT text.
!
Viewport
Add viewport meta tag for mobile responsiveness.
!
Open Graph
Missing: og:title, og:description, og:image, og:url
Add missing OpenGraph tags for social media sharing: og:title, og:description, og:image, og:url
!
Structured Data
0 JSON-LD scripts
Add structured data (JSON-LD) for rich snippets and better SEO.