What technology does kakuyomu.jp use?

kakuyomu.jp is built with Next.js, Nginx.

Is kakuyomu.jp secure (HTTPS)?

Yes. kakuyomu.jp uses TLS 1.3 with a certificate issued by Amazon, valid until Dec 20, 2026.

Who hosts kakuyomu.jp?

kakuyomu.jp is hosted on AWS, behind CloudFront CDN.

What is kakuyomu.jp's SEO score?

kakuyomu.jp scored 70/100 for SEO in the latest analysis (fair).

What is kakuyomu.jp's overall website score?

kakuyomu.jp has an overall SiteGraph score of 80/100, combining SEO, performance, security, and accessibility.

kakuyomu.jp

無料で小説を書ける、読める、伝えられる - カクヨム

Last scanned Jul 24, 2026, 6:17 PM · 2 views

Overall score

Great

Summary

様々なWeb小説を無料で「書ける、読める、伝えられる」、KADOKAWA × はてなによるWeb小説サイトです。ジャンルはファンタジー、SF、恋愛、ホラー、ミステリーなど�… This website uses Next.js hosted on AWS behind CloudFront CDN. SEO is fair (70/100) and accessibility is excellent (100/100). Security scores good (80/100) and performance good (75/100). Top issue: Title longer than 60 characters.

様々なWeb小説を無料で「書ける、読める、伝えられる」、KADOKAWA × はてなによるWeb小説サイトです。ジャンルはファンタジー、SF、恋愛、ホラー、ミステリーなどがあり、二次創作作品も楽し…

United States

Hosted on AWS

Top issues to fix

8 issues found · 2 high priority

Missing Strict-Transport-Security header
Security
Add HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing Content-Security-Policy header
Security
Add a CSP to control which sources can run scripts — the strongest single defense against XSS.
Title longer than 60 characters
SEO
Shorten the title to under 60 characters so search results don't truncate it.
Meta description longer than 160 characters
SEO
Trim the meta description to under 160 characters to avoid truncation in search results.
Missing canonical link
SEO
Add <link rel="canonical"> so search engines know which URL variant to index.
No structured data (JSON-LD) found
SEO
Add JSON-LD (Organization, Article, Product…) to become eligible for rich results.

+2 more issues — details in the sections below.

SEO

5 issue(s) found

Performance

15 ms

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Organization

Company details published in this site's own structured data.

X (Twitter)X (Twitter)

Meta tags

Title: 無料で小説を書ける、読める、伝えられる - カクヨム
Description: 様々なWeb小説を無料で「書ける、読める、伝えられる」、KADOKAWA × はてなによるWeb小説サイトです。ジャンルはファンタジー、SF、恋愛、ホラー、ミステリーなどがあり、二次創作作品も楽し…
Canonical
Language: ja
Charset: utf-8
Viewport: width=device-width, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no, viewport-fit=cover
Robots meta: index,follow
Manifest: https://kakuyomu.jp/manifest.json

Technologies

Detected frameworks, languages, and tools.

Next.js Nginx

Hosting & CDN

Hosting provider: AWS
CDN provider: CloudFront
IP address: 13.227.249.84
ASN: AS16509 (AMAZON-02 - Amazon.com, Inc., US)

DNS records

Type	Value
A	13.227.249.84 13.227.249.119 13.227.249.75 13.227.249.88
AAAA	—
MX	mailinbound.hatena.ne.jp
TXT	v=spf1 include:mdmouse.maildealer.jp include:spf-bma.mpme.jp include:sendgrid.net ~all google-site-verification=LXWmZ0kV7e8yNRdGAlbkmAh4T143VWRaDvu7XzRrsos
NS	ns-457.awsdns-57.com ns-1802.awsdns-33.co.uk ns-971.awsdns-57.net ns-1435.awsdns-51.org
CAA	—
CNAME	—
IPv6 support	No

TLS / SSL certificate

Version: TLS 1.3
Issuer: Amazon
Subject: kakuyomu.jp
Valid from: Jun 6, 2026
Valid to: Dec 20, 2026
Days until expiry: 149
SAN domains: kakuyomu.jp

Security headers

Strict-Transport-SecurityMissing
Content-Security-PolicyMissing
X-Frame-OptionsEnabled
X-Content-Type-OptionsEnabled
Referrer-PolicyMissing
Permissions-PolicyMissing

Compression: gzip · 1 cookie(s) observed

Content & assets

Headings

H1 1 · H2 9 · H3 43

Links

208 internal · 12 external · 2 broken

Images

37 total · 2 missing alt

Scripts / Styles

28 scripts · 7 stylesheets

JS / CSS size

2.1 MB · 209 KB

Page size

330 KB

Robots.txt & Sitemap

robots.txt: Found
Disallow rules: 6
sitemap.xml: Not found
URLs in sitemap: 0

SEO issues

Title longer than 60 characters
Meta description longer than 160 characters
Missing canonical link
No structured data (JSON-LD) found
sitemap.xml not found

Scan details

Requested URL: https://kakuyomu.jp
Final URL: https://kakuyomu.jp
HTTP status: 200
HTTP version: HTTP/2
Response time: 9 ms
HTML size: 330 KB
Redirect chain: https://kakuyomu.jp

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Frequently asked questions

What technology does kakuyomu.jp use?: kakuyomu.jp is built with Next.js, Nginx.
Is kakuyomu.jp secure (HTTPS)?: Yes. kakuyomu.jp uses TLS 1.3 with a certificate issued by Amazon, valid until Dec 20, 2026.
Who hosts kakuyomu.jp?: kakuyomu.jp is hosted on AWS, behind CloudFront CDN.
What is kakuyomu.jp's SEO score?: kakuyomu.jp scored 70/100 for SEO in the latest analysis (fair).
What is kakuyomu.jp's overall website score?: kakuyomu.jp has an overall SiteGraph score of 80/100, combining SEO, performance, security, and accessibility.