duga.jp

https://duga.jp· First analyzed 16 May 2026· Updated 16 May 2026

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duga.jp

Mobile

Sponsored

Hosting Provider

SAKURA Internet Inc.

IP Address

153.126.247.101

Site Location

🇯🇵 Japanvia tld

Server Location

🇯🇵 Sendai, Japan

ASN

AS7684

Organization

SAKURA Internet Inc.

Server

Apache

Nameservers

ns-752.awsdns-30.net.ns-1259.awsdns-29.org.ns-2017.awsdns-60.co.uk.ns-51.awsdns-06.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.1 s10%

Speed Index

1.4 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

56 KB

12 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

SAKURA Internet Inc.

Technology Stack

5 Technologies Detected

Analytics

CSS Frameworks

Web Servers

SEO Analysis

D48/100

Meta Tags10/15

Content0/12

Headings6/8

Technical14/25

E-E-A-T0/7

Images4/7

Links2/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

duga.jpduga.jp

DUGA（デュガ） | アダルト動画 - マニア、フェチから女優まで

DUGAは国内976メーカーの13万作品を取り扱うアダルト動画サイト。おかげさまで開設19周年。会員数150万人を突破！全作品のサンプル動画を無料配信中。マルチデバイス対応。

Title Length34 chars

Recommended: 50-60 chars (~211px / 580px)

Description Length87 chars

Recommended: 120-160 chars

Issues (1)

• Very thin content (24 words). Search engines need substantial content for ranking.

10 issues found

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Crawlability

Sitemap

Type: index

31 URLs

31 sub-sitemaps

robots.txt

4 rules

Sitemap reference found

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

F26/100

Bot Access

20/25

Machine Read.

4/25

Schema Data

0/25

Citation

2/25

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:1%

Words:19

Token eff.:Too Short

Structured Data

No Schema

Citation Readiness

Opening Summary

Descriptive Headings

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

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.

74/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

14/20

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.

1 recommendation

•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.

53/100

A+

7 mg

CO₂e / view

55.7 KB

Page Weight

95%

Cleaner Than

New Visitor

8 mg

Returning (cached)

4 mg

Annual (10K/mo)

828 g

Emission Segments

Data Center

2 mg

Network

2 mg

Device

4 mg

Resource Breakdown

CSS

48.5 KB

HTML

7.2 KB

Green Hosting Not Verified

SAKURA Internet Inc.

5 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

51%Poor

Interactive

HTTPS

No WAF

108d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert Inc

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

07.08.2025

Valid Until

01.09.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

www.duga.jpduga.jp

SHA-256 Fingerprint

1C:14:EE:30:34:4E:BD:C1:01:B4:93:7A:35:EE:98:24:38:BB:90:12...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

content-encoding

📦 Gzip(gzip)

content-length

7078

content-security-policy

frame-ancestors https://duga.jp https://*.duga.jp

content-type

text/html; charset=utf-8

date

Sat, 16 May 2026 05:16:15 GMT

server

Apache/2.4.46 (Unix) OpenSSL/1.0.2k-fips mod_antiloris/0.7.0

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

mail.duga.jp

Domain Information

duga.jp

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

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.

49/100

Not 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

3 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

ヒラギノ角ゴ Pro W3

WCAG AA

58/100

Readability

/30

13/30

12px · LH --

Hierarchy

/20

10/20

1.11x ratio · ✓ H1→H6

WCAG

/25

21/25

4.53:1 min contrast

Performance

/25

14/25

1 font

Heading Font

ヒラギノ角ゴ Pro W3

Sans13px

Body Font

ヒラギノ角ゴ Pro W3

Sans12px

Contrast Ratio

4.53:1

WCAG AA (≥4.5:1)

Reading Comfort

Single Font Family

left aligned

13px

❌ Critical: 12px body text is too small. Minimum 14px, recommend 16px+.

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 4.5:1).

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

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

✅ Lean font stack: 1 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

3.04:1 AA Large Light

#ffffff

Background· 95.10000000000001%

#939495

Other· 0.7%

#ed0001

Primary· 0.9%

#4d2627

Secondary· 0.7%

#ee1d1d

Accent· 0.1%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

Microsoft ClarityFree

User behavior and product analytics

Sponsored

Scripts & Styles

4 Resources

Scripts

Styles

Async

Defer

Top Script Sources

scripts.clarity.ms(1)clarity.ms(1)googletagmanager.com(1)

Website Identity

duga.jp

Location detected: 🇯🇵 Japanvia tld

Sponsored

Last analyzed: 16 May 2026 at 05:16

Historical Analysis & Change Tracking