yahoo.jp

https://yahoo.jp· First analyzed 28 Apr 2026· Updated 28 Apr 2026

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yahoo.jp

Mobile

Sponsored

Hosting Provider

YAHOO

IP Address

182.22.25.252

Site Location

🇯🇵 Japanvia tld

Server Location

🇯🇵 Chiyoda City, Japan

ASN

AS23816

Organization

YAHOO

Nameservers

ns02.yahoo.co.jp.ns12.yahoo.co.jp.ns11.yahoo.co.jp.ns01.yahoo.co.jp.

Performance

Core Web Vitals

Weight

First Contentful Paint

2.9 s10%

Speed Index

3.8 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

49 KB

73 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

YAHOO

Technology Stack

4 Technologies Detected

CSS Frameworks

Analytics

Tag Managers

Advertising

SEO Analysis

D56/100

Meta Tags7/15

Content8/12

Headings4/8

Technical15/21

E-E-A-T0/7

Images3/7

Links2/5

URL5/5

Social3/5

Freshness2/4

Mobile4/4

Indexability3/3

yahoo.jpyahoo.jp

Yahoo! JAPAN

あなたの毎日をアップデートする情報ポータル。検索、ニュース、天気、スポーツ、メール、ショッピング、オークションなど便利なサービスを展開しています。

Title Length12 chars

Recommended: 50-60 chars (~72px / 580px)

Description Length73 chars

Recommended: 120-160 chars

Issues (1)

• Most images missing alt text (52/55) — critical for accessibility and SEO

9 issues found

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Local SEO

Local Search Readiness

3/100

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

D47/100

Bot Access

20/25

Machine Read.

14/25

Schema Data

0/25

Citation

13/25

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

def. listsnavheader/footer

Text ratio:2%

Words:432

Token eff.:Optimal

Depth:3/5

Structured Data

No Schema

Citation Readiness

Opening Summary65w

Descriptive Headings

Canonical URL

Open Graph3/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (7)

AI readiness recommendation preview...

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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.

82/100

Passed

Critical

Warnings

Images & Alt Text

15/20

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

Semantic Structure

18/20

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

10/15

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

2 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.

63/100

A+

6 mg

CO₂e / view

49.0 KB

Page Weight

95%

Cleaner Than

New Visitor

7 mg

Returning (cached)

4 mg

Annual (10K/mo)

732 g

Emission Segments

Data Center

1 mg

Network

2 mg

Device

3 mg

Resource Breakdown

Images

15.6 KB

HTML

33.4 KB

Green Hosting Not Verified

YAHOO

4 recommendations

•Carbon footprint recommendation preview...

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Security Score

0%Critical

Critical / Transactional

HTTPS

No WAF

220d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Cybertrust Japan Co., Ltd.

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

05.11.2025

Valid Until

04.12.2026

OCSP Stapling

Enabled

Subject Alternative Names (20)

edge01.yahoo.co.jp*.yahoo.co.jp*.yahooapis.jp*.ane.yahoo.co.jp*.auctions.yahoo.co.jp*.auctions.yahooapis.jp*.box.yahooapis.jp*.bylines.news.yahoo.co.jp+12 more

SHA-256 Fingerprint

E6:94:9F:F0:FE:BC:51:88:C0:DE:5B:52:8D:0D:47:40:36:C1:39:90...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ch

Sec-CH-UA-Full-Version-List, Sec-CH-UA-Model, Sec-CH-UA-Plat...

accept-ranges

none

age

cache-control

🔴 No Cache(private, no-cache, must-revalidate)

content-encoding

⚡ Brotli(br)

content-type

text/html; charset=UTF-8

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

Domain Information

yahoo.jp

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

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.

59/100

Mobile Friendly1 breakpoint

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=1010

Typography & Readability

YJTop Ellipsis

WCAG AAA

58/100

Readability

/30

13/30

14px · LH 1.00

Hierarchy

/20

10/20

1x ratio

WCAG

/25

21/25

8.61:1 min contrast

Performance

/25

14/25

1 font

Heading Font

YJTop Ellipsis

Sans14px

Body Font

YJTop Ellipsis

Sans14px

Contrast Ratio

8.61:1

WCAG AAA (≥7:1)

Reading Comfort

Single Font Family

left aligned

14px

⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

⚠️ Tight line spacing (1.00). Increase to 1.4–1.6 for better readability.

✅ Easy to read: Flesch score 73/100 — accessible to general audiences.

✅ WCAG AAA contrast: All text meets 7:1 ratio (min 8.6:1).

⚠️ Minor heading issue: 0 level skip(s) detected. Maintain sequential order for screen readers.

⚠️ Weak hierarchy: Headlines should be ≥2x body size for clear visual structure.

Buy on MyFontsFlesch 73

Color Palette

6 unique colors

2.09:1 Fail Light

#ffffff

Background· 67.1%

#b8b1b9

Other· 7%

#e6ebfd

Primary· 15.299999999999999%

#ced5e1

Secondary· 4.1%

#7d616c

Secondary· 4.1%

#e5e1df

Secondary· 2.5%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

11 Resources

Scripts

Styles

Async

Defer

Top Script Sources

s.yimg.jp(6)yads.c.yimg.jp(3)googletagmanager.com(1)

Website Identity

yahoo.jp

Location detected: 🇯🇵 Japanvia tld

Sponsored

Last analyzed: 28 Apr 2026 at 01:31

Historical Analysis & Change Tracking