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serai.jp

https://serai.jp· First analyzed 14 May 2026· Updated 14 May 2026
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serai.jp
Desktop screenshot of serai.jp
Mobile screenshot of serai.jp
Mobile

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Hosting Provider

NEXTNEXT

IP Address

182.236.92.146

Site Location

🇯🇵 Japanvia tld

Server Location

🇯🇵 Tokyo, Japan

ASN

AS15830

Server

Nginx

CDN

CDN

Nameservers

ns-1482.awsdns-57.org.ns-1560.awsdns-03.co.uk.ns-467.awsdns-58.com.ns-706.awsdns-24.net.

Performance

98

Core Web Vitals

Weight

First Contentful Paint
952 ms10%
Speed Index
1.2 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
35.4 MB
231 requests

Image Optimization

Lazy LoadWebPResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
WordPressv5.7.2
cms
serai2020v1.0.0Custom
View Theme

Technology Stack

14 Technologies Detected

Analytics

3
Google Analytics
Google Analytics 4
Facebook Pixel

Advertising

2
Google AdsCriteo

Plugins

2
Instagram FeedWp Pagenavi

Libraries

1
jQueryv3.4.1

UI Components

1
Swiper

CSS Frameworks

1
Tailwind CSS

Fonts

1
Google Fonts

Tag Managers

1
Google Tag Manager

Web Servers

1
Nginxv1.26.0

Languages

1
PHPv8.0.30

SEO Analysis

B72/100
22
6
2
Meta Tags7/15
Content9/12
Headings3/8
Technical23/25
E-E-A-T2/7
Images3/7
Links5/5
URL5/5
Social5/5
Freshness4/4
Mobile3/4
Indexability3/3
S
serai.jpserai.jp

サライ.jp｜小学館の雑誌『サライ』公式サイト

小学館の雑誌『サライ』の公式サイトです。歳を重ね、よりアクティブに行動したいと思っている大人の方々へのライフスタイル提案と、旅、食、人物、歴史、文化、趣味、健康、モノ情報など上質な情報を発信します。

Title Length23 chars

Recommended: 50-60 chars (~140px / 580px)

Description Length99 chars

Recommended: 120-160 chars

Issues (2)

  • • Missing H1 tag — every page should have exactly one H1
  • • Most images missing alt text (123/151) — critical for accessibility and SEO

8 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

165 URLs

165 sub-sitemaps

robots.txt

6 rules

Sitemap reference found

Local SEO

Local Search Readiness

14/100
Poor
4 13

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

Sponsored

AI & LLM Readiness

D53/100
Bot Access
20/25
Machine Read.
11/25
Schema Data
6/25
Citation
16/25

AI Bot Access

14/14 accessible
AI Search
OAI-SearchBot
PerplexityBot
Claude-SearchBot
Gemini-Deep-Research
DuckAssistBot
Training
GPTBot
ClaudeBot
Google-Extended
Meta-ExternalAgent
Bytespiderinfo
Amazonbot
Applebot-Extended
CCBotinfo
Fetch
ChatGPT-User

Machine Readability

llms.txt
llms-full.txt
Semantic HTML
Heading Hierarchy
nav
Text ratio:3%
Words:901
Token eff.:Optimal
Depth:1/5

Structured Data

4 JSON-LD
Organization×1.1WebSiteBreadcrumbList

Citation Readiness

Opening Summary95w
Descriptive Headingsavg 1.3w
Canonical URL
Open Graph3/3
Twitter Card3/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (8)
AI readiness recommendation preview...
Upgrade to view recommendations

Sponsored

Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
A
87/100
15
Passed
1
Critical
1
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
20/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
15/15
Verifies form fields have labels, error messages are clear, and inputs are properly associated.
Color & Contrast
15/15
Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
Keyboard & Focus
9/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
8/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
2 recommendations
  • •Accessibility recommendation preview...
Upgrade to view recommendations

Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
21/100
F
4.49 g
CO₂e / view
35.4 MB
Page Weight
5%
Cleaner Than
New Visitor
5.13 g
vs
Returning (cached)
2.56 g
Annual (10K/mo)
538.5 kg
Emission Segments
Data Center
1.00 g
Network
1.08 g
Device
2.41 g
Resource Breakdown
JavaScript
666.5 KB
Images
34.5 MB
CSS
83.5 KB
Fonts
118.8 KB
HTML
38.5 KB
Other
29.4 KB
Green Hosting Not Verified
NEXTNEXT
9 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

36%Critical
Interactive

HTTPS

No WAF

52d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Japan Registry Services Co., Ltd.

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

06.04.2026

Valid Until

05.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.serai.jpserai.jp

SHA-256 Fingerprint

C4:E0:A1:E8:8F:73:CC:1B:F8:16:62:3E:CB:3A:03:56:71:90:21:3E...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations
Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges
bytes
age
13589
content-encoding
📦 Gzip(gzip)
content-length
39166
content-type
text/html; charset=UTF-8
date
Thu, 14 May 2026 00:46:39 GMT
Good Warning Issue

Email Infrastructure

Google Workspace

Score

65

SPF
DKIM
DMARC

DMARC Policy

None (Monitor Only)

MX Records (5)

alt2.aspmx.l.google.com
alt1.aspmx.l.google.com
aspmx3.googlemail.com
aspmx2.googlemail.com

+1 more

Domain Information

serai.jp

DNSSEC
Not Enabled

Privacy & Compliance

Quantcast Choice

Cookie Consent Banner
Quantcast Choice
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
CMP: Quantcast Choice
Privacy policy page linked
Data Protection Officer mentioned

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
B
76/100
Mobile Friendly8 breakpoints
Viewport Meta
The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
Responsive Design
Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
Touch Icons
Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
Readable Font Size
Base font size should be at least 16px on mobile to ensure text is readable without zooming.
Relative Units
Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
No H-Scroll Risk
No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
Tap Targets OK
Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
No Fixed Widths
No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
Viewport
width=device-width, initial-scale=1.0
1 recommendation
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

YuMincho + Noto Sans CJK JP

WCAG Partial
62/100
Readability
/30
16/30

13px · LH 1.60

Hierarchy
/20
19/20

2.46x ratio · ✓ H1→H6

WCAG
/25
11/25

3.21:1 min contrast

Performance
/25
16/25

3 fonts · 1 req

Heading Font

YuMincho

Sans32px

Body Font

Noto Sans CJK JP

Sans13px

Contrast Ratio

3.21:1

15 issues

Reading Comfort

~48 CPL

Optimal (45–75)
32px
h1
32px
h2
34px
h3
13px
p
Minor Second
Scale

❌ Critical: 13px body text is too small. Minimum 14px, recommend 16px+.

✅ Optimal line spacing: 1.60 ratio (ideal range 1.4–1.6).

✅ Optimal line length: ~48 chars/line (ideal 45–75 CPL).

✅ Easy to read: Flesch score 88/100 — accessible to general audiences.

⚠️ Partial contrast: 15 elements below WCAG AA threshold (min 3.2:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

GGoogle FontsBuy on MyFontsFlesch 88

Color Palette

11 unique colors
3.04:1 AA Large Light
#ffffff
Background· 38.300000000000004%
#919591
Other· 11.5%
#9b3606
Primary· 8.7%
#d36b22
Accent· 6.2%
#ead6bc
Accent· 6%
#dcaa6c
Accent· 5.8%
#331609
Accent· 5.2%
#7f6745
Secondary· 3.3%

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

2
Google Tag ManagerFree
Google AnalyticsFree

User behavior and product analytics

Advertising

1
Facebook PixelMid-Market

Ad platforms and retargeting pixels

2

Categories

3

Total Tools

0

Enterprise

1

Mid-Market

Assessment: Well-developed marketing technology stack

Ad Networks

Google Ad ManagerPrebid.js

Sponsored

Scripts & Styles

26 Resources

20
Scripts
6
Styles
20
Async
0
Defer

Top Script Sources

dmp.im-apps.net(6)l.logly.co.jp(4)googletagmanager.com(2)connect.facebook.net(2)in.treasuredata.com(1)

Website Identity

サライ.jp｜小学館の雑誌『サライ』公式サイト

Organization

小学館の雑誌『サライ』の公式サイトです。歳を重ね、よりアクティブに行動したいと思っている大人の方々へのライフスタイル提案と、旅、食、人物、歴史、文化、趣味、健康、モノ情報など上質な情報を発信します。

serai.jp/
Location detected: 🇯🇵 Japanvia tld
📧 Google Workspaceja

Sponsored

Last analyzed: 14 May 2026 at 00:47

Historical Analysis & Change Tracking