ninja.co.jp

https://ninja.co.jp· First analyzed 11 May 2026· Updated 11 May 2026

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ninja.co.jp

Mobile

Sponsored

Hosting Provider

IDC Frontier Inc.

IP Address

202.228.215.61

Site Location

🇯🇵 Japanvia tld

Server Location

🇯🇵 Chiyoda City, Japan

ASN

AS4694

Server

OpenResty

Nameservers

ns-cloud-a4.googledomains.com.ns-cloud-a2.googledomains.com.ns-cloud-a3.googledomains.com.ns-cloud-a1.googledomains.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

6.3 s10%

Speed Index

8.1 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

549 KB

56 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

Infrastructure

Hosting

IDC Frontier Inc.

Technology Stack

12 Technologies Detected

Libraries

CSS Frameworks

Analytics

Advertising

Google Ads Google AdSense

Icon Libraries

Fonts

Tag Managers

Web Servers

SEO Analysis

D52/100

Meta Tags10/15

Content6/12

Headings1/8

Technical13/21

E-E-A-T0/7

Images4/7

Links5/5

URL5/5

Social3/5

Freshness0/4

Mobile2/4

Indexability3/3

ninja.co.jpninja.co.jp

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Title Length38 chars

Recommended: 50-60 chars (~235px / 580px)

Description Length74 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

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

F34/100

Bot Access

20/25

Machine Read.

4/25

Schema Data

0/25

Citation

10/25

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:0%

Words:64

Token eff.:Too Short

Sections/1K:10

Structured Data

No Schema

Citation Readiness

Opening Summary

Descriptive Headingsavg 1w

Canonical URL

Open Graph3/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (12)

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.

71/100

Passed

Critical

Warnings

Images & Alt Text

15/20

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

Semantic Structure

13/20

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

7/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

6/15

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.

46/100

68 mg

CO₂e / view

549.2 KB

Page Weight

80%

Cleaner Than

New Visitor

78 mg

Returning (cached)

39 mg

Annual (10K/mo)

8.1 kg

Emission Segments

Data Center

15 mg

Network

16 mg

Device

36 mg

Resource Breakdown

JavaScript

368.4 KB

Images

80.0 KB

CSS

74.3 KB

Fonts

3.9 KB

HTML

3.6 KB

Other

19.0 KB

Green Hosting Not Verified

IDC Frontier Inc.

5 recommendations

•Carbon footprint recommendation preview...

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Security Score

81%Very Good

Static / Informational

HTTPS

No WAF

21d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

04.03.2026

Valid Until

02.06.2026

Subject Alternative Names (2)

*.ninja.co.jpninja.co.jp

SHA-256 Fingerprint

0C:DD:D6:87:C0:64:23:11:70:DA:14:35:82:C5:B6:D1:FA:37:48:E9...

Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

access-control-allow-methods

GET

access-control-allow-origin

content-encoding

📦 Gzip(gzip)

content-length

3419

content-type

text/html; charset=UTF-8

date

Mon, 11 May 2026 18:38:25 GMT

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

MX Records (5)

alt3.aspmx.l.google.com

alt4.aspmx.l.google.com

alt2.aspmx.l.google.com

aspmx.l.google.com

+1 more

Domain Information

ninja.co.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.

43/100

Not 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=device-width,user-scalable=no,maximum-scale=1

3 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Arial

WCAG Partial

64/100

Readability

/30

20/30

15px · LH 1.50

Hierarchy

/20

8/20

0.93x ratio

WCAG

/25

17/25

1.73:1 min contrast

Performance

/25

19/25

System fonts

Heading Font

Arial

Sans14px

Body Font

Arial

Sans15px

Contrast Ratio

1.73:1

8 issues

Reading Comfort

~40 CPL

Narrow lines

14px

16px

15px

Minor Second

Scale

⚠️ Small text: 15px may strain on mobile. Use ≥16px for WCAG compliance.

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

⚠️ Partial contrast: 8 elements below WCAG AA threshold (min 1.7:1).

⚠️ Minor heading issue: 1 level skip(s) detected. Maintain sequential order for screen readers.

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

✅ System fonts: Zero font loading delay — best possible LCP impact.

GGoogle Fonts

Color Palette

6 unique colors

12.65:1 AAA Light

#efeeec

Background· 46.89999999999999%

#2a2827

Other· 7.4%

#cec7b1

Primary· 3%

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Google AdsEnterprise

Ad platforms and retargeting pixels

Sponsored

Scripts & Styles

24 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(7)pagead2.googlesyndication.com(2)googletagmanager.com(2)asumi.shinobi.jp(2)google-analytics.com(1)

Website Identity

ninja.co.jp

Location detected: 🇯🇵 Japanvia tld

📧 Google Workspaceja

Social Profiles

Facebook X (Twitter)

Sponsored

Last analyzed: 11 May 2026 at 18:38

Historical Analysis & Change Tracking

ninja.co.jp

忍者ツールズ｜ホームページ ブログ アクセス解析 カウンター メールフォーム

Accessibility

Carbon Footprint

Mobile Compatibility

Color Palette

ninja.co.jp

忍者ツールズ｜ホームページブログアクセス解析カウンターメールフォーム