y-history.net

https://y-history.net· First analyzed 31 May 2026· Updated 31 May 2026

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y-history.net

Mobile

Sponsored

Hosting Provider

SPEEDIA Co., Ltd.

IP Address

219.109.139.69

Site Location

🇯🇵 Japanvia ip

Server Location

🇯🇵 Chiyoda City, Japan

ASN

AS7516

Organization

SPEEDIA Co., Ltd.

Server

Apache

Nameservers

ns1.netplatz.jp.ns2.netplatz.jp.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.1 s10%

Speed Index

1.5 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

207 KB

10 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

SPEEDIA Co., Ltd.

Technology Stack

1 Technologies Detected

Web Servers

Apache

SEO Analysis

D40/100

Meta Tags5/15

Content6/12

Headings1/8

Technical9/21

E-E-A-T0/7

Images4/7

Links3/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

y-history.nety-history.net

世界史の窓

世界史学習のための用語集を中心としたページです。

Title Length5 chars

Recommended: 50-60 chars (~31px / 580px)

Description Length24 chars

Recommended: 120-160 chars

Issues (1)

• Missing H1 tag — every page should have exactly one H1

11 issues found

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Local SEO

Local Search Readiness

2/100

Poor

1 14 2

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

Sponsored

AI & LLM Readiness

F27/100

Bot Access

20/25

Machine Read.

4/25

Schema Data

0/25

Citation

3/25

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

Text ratio:19%

Words:90

Token eff.:Too Short

Sections/1K:10

Structured Data

No Schema

Citation Readiness

Opening Summary12w

Descriptive Headingsavg 2w

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (12)

AI readiness recommendation preview...

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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.

64/100

Passed

Critical

Warnings

Images & Alt Text

20/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

4/20

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

1/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

3 recommendations

•Accessibility recommendation preview...

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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.

50/100

A+

26 mg

CO₂e / view

207.0 KB

Page Weight

95%

Cleaner Than

New Visitor

29 mg

Returning (cached)

15 mg

Annual (10K/mo)

3.1 kg

Emission Segments

Data Center

6 mg

Network

6 mg

Device

14 mg

Resource Breakdown

JavaScript

1.7 KB

Images

52.2 KB

CSS

22.7 KB

HTML

16.3 KB

Other

114.2 KB

Green Hosting Not Verified

SPEEDIA Co., Ltd.

5 recommendations

•Carbon footprint recommendation preview...

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Security Score

71%Good

Static / Informational

HTTPS

No WAF

183d

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/1.1

Valid From

31.10.2025

Valid Until

30.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

y-history.netwww.y-history.net

SHA-256 Fingerprint

A5:5E:5D:F8:86:0D:92:29:BA:CB:0E:8F:5E:D1:60:95:3D:66:2A:D3...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

bytes

connection

Keep-Alive

content-length

16385

content-type

text/html

date

Sun, 31 May 2026 01:39:21 GMT

keep-alive

timeout=5, max=2000

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

y-history.net

Domain Information

y-history.net

Domain Age

24y 2m

Created

02.04.2002

Expires

01.04.2027

Last Updated

10.03.2026

Registrar

Japan Registry Services Co., Ltd.

DNSSEC

Not Enabled

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.

53/100

Mobile Friendly

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,minimum-scale=1.0

4 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

ＭＳゴシック + メイリオ

WCAG Partial

49/100

Readability

/30

14/30

13px · LH 1.40

Hierarchy

/20

7/20

WCAG

/25

14/25

2.44:1 min contrast

Performance

/25

14/25

2 fonts

Heading Font

ＭＳゴシック

Sans

Body Font

メイリオ

Sans13px

Contrast Ratio

2.44:1

6 issues

Reading Comfort

~40 CPL

Narrow lines

16px

12px

13px

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

✅ Optimal line spacing: 1.40 ratio (ideal range 1.4–1.6).

⚠️ Partial contrast: 6 elements below WCAG AA threshold (min 2.4:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

✅ Lean font stack: 2 font families keeps load times fast.

⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

Buy on MyFonts

Color Palette

9 unique colors

Dark

#5a6465

Other· 5.9%

#99cdff

Accent· 32.3%

#ffffff

Primary· 0%

#d9d9f8

Background· 25.7%

#68adeb

Accent· 11.9%

#e3fbfe

Accent· 8.4%

#5595bd

Secondary· 6.9%

#4cddd7

Accent· 4.9%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

2 Resources

Scripts

Styles

Async

Defer

Top Script Sources

wh_note(1)

Website Identity

y-history.net

[email protected]

24 years old

Location detected: 🇯🇵 Japanvia ip

Japan Registry Services Co., Ltd.

Sponsored

Last analyzed: 31 May 2026 at 01:39

Historical Analysis & Change Tracking