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251901.net

https://251901.net· First analyzed 06 May 2026· Updated 06 May 2026
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251901.net
Desktop screenshot of 251901.net
Mobile screenshot of 251901.net
Mobile

Sponsored

Hosting Provider

BETINC

IP Address

202.226.39.177

Site Location

🇯🇵 Japanvia ip

Server Location

🇯🇵 Chiyoda City, Japan

ASN

AS131965

Organization

BETINC

Server

Nginx

Nameservers

ns5.xserver.jp.ns4.xserver.jp.ns2.xserver.jp.ns1.xserver.jp.+1 more

Performance

95

Core Web Vitals

Weight

First Contentful Paint
1.2 s10%
Speed Index
1.5 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
3.5 MB
159 requests

Image Optimization

Lazy LoadWebPResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
WordPress
cms
ikeda2012Custom

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

12 Technologies Detected

Plugins

4
Wp Custom Fields SearchGoogle Language Translator
WooCommerce
Yoast SEO

Analytics

2
Google Analytics
Google Analytics 4

Libraries

1
jQuery

CSS Frameworks

1
Tailwind CSS

Fonts

1
Google Fonts

Tag Managers

1
Google Tag Manager

Advertising

1
Google Ads

Web Servers

1
Nginx

SEO Analysis

C68/100
21
7
0
Meta Tags9/15
Content11/12
Headings5/8
Technical17/21
E-E-A-T3/7
Images6/7
Links5/5
URL5/5
Social3/5
Freshness0/4
Mobile1/4
Indexability3/3
2
251901.net251901.net

美容外科　レーザー脱毛　東京皮膚科・形成外科　銀座院

美容外科・美容皮膚科のことなら東京皮膚科形成外科。形成外科認定医でアンチエイジング外科・美容再生研究会の理事も努める医師が納得の美容医療をご提供します。東京の銀座駅、東銀座駅、銀座一丁目駅から近くの皮膚科、美容皮膚科、形成外科、エイジングケアクリニック。

Title Length26 chars

Recommended: 50-60 chars (~161px / 580px)

Description Length127 chars

Recommended: 120-160 chars

Issues (0)

    7 issues found

    Upgrade to view details

    Local SEO

    Local Search Readiness

    10/100
    Poor
    3 12 2

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

    Sponsored

    AI & LLM Readiness

    D44/100
    Bot Access
    20/25
    Machine Read.
    10/25
    Schema Data
    3/25
    Citation
    11/25

    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. lists
    Text ratio:11%
    Words:1,041
    Token eff.:Optimal
    Sections/1K:5.8
    Depth:1/5

    Structured Data

    1 JSON-LD
    WebSiteSearchAction

    Citation Readiness

    Opening Summary14w
    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 (10)
    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.
    C
    67/100
    10
    Passed
    4
    Critical
    1
    Warnings
    Images & Alt Text
    20/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    11/20
    Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
    Forms & Inputs
    5/15
    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
    7/15
    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.
    23/100
    F
    441 mg
    CO₂e / view
    3.5 MB
    Page Weight
    15%
    Cleaner Than
    New Visitor
    503 mg
    vs
    Returning (cached)
    252 mg
    Annual (10K/mo)
    52.9 kg
    Emission Segments
    Data Center
    98 mg
    Network
    106 mg
    Device
    236 mg
    Resource Breakdown
    JavaScript
    141.3 KB
    Images
    3.2 MB
    CSS
    162.7 KB
    HTML
    19.5 KB
    Green Hosting Not Verified
    BETINC
    6 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    F

    Security Score

    21%Critical
    Interactive

    HTTPS

    No WAF

    79d

    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

    26.04.2026

    Valid Until

    25.07.2026

    Subject Alternative Names (2)

    251901.netwww.251901.net

    SHA-256 Fingerprint

    97:F3:38:5D:09:60:8B:D4:47:06:48:3D:9A:65:0C:B5:04:D3:DF:F4...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    cache-control
    🟡 3s(max-age=3, must-revalidate)
    content-encoding
    ⚡ Brotli(br)
    content-type
    text/html; charset=UTF-8
    date
    Wed, 06 May 2026 11:36:21 GMT
    server
    nginx
    vary
    Accept-Encoding, Accept-Encoding,Cookie,User-Agent
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    90

    SPF
    DKIM
    DMARC

    DMARC Policy

    None (Monitor Only)

    MX Records (1)

    251901.net

    Domain Information

    251901.net

    Domain Age
    21y 11m

    Created

    10.06.2004

    Expires

    10.06.2027

    Last Updated

    10.05.2025

    Registrar

    Japan Registry Services Co., Ltd.

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Cookie Consent Banner
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Privacy policy page linked

    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
    70/100
    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=device-width

    Typography & Readability

    Hiragino Kaku Gothic Pro W3

    WCAG Partial
    49/100
    Readability
    /30
    10/30

    10px · LH 1.70

    Hierarchy
    /20
    9/20

    1x ratio

    WCAG
    /25
    16/25

    1:1 min contrast

    Performance
    /25
    14/25

    1 font

    Heading Font

    Hiragino Kaku Gothic Pro W3

    Sans10px

    Body Font

    Hiragino Kaku Gothic Pro W3

    Sans10px

    Contrast Ratio

    1:1

    3 issues

    Reading Comfort

    ~77 CPL

    Wide lines
    10px
    h1
    14px
    h2
    11px
    h4
    10px
    p
    Minor Second
    Scale

    ❌ Critical: 10px body text is too small. Minimum 14px, recommend 16px+.

    ⚠️ Wide lines: ~77 chars/line. Use max-width: 65ch for comfortable reading.

    ⚠️ Partial contrast: 3 elements below WCAG AA threshold (min 1.0:1).

    ⚠️ 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.

    ✅ Lean font stack: 1 font families keeps load times fast.

    Buy on MyFontsFlesch 58

    Color Palette

    8 unique colors
    6.89:1 AA Light
    #ffffff
    Primary· 48.70000000000001%
    #645758
    Other· 7%
    #c2aa9e
    Secondary· 7.6%
    #333a40
    Text· 5.3%
    #c0d0d0
    Border· 4.7%
    #76987c
    Secondary· 4.3%

    Business & Marketing Stack

    2 Tools Detected

    Growing

    Behavior Analytics

    2
    Google Tag ManagerFree
    Google AnalyticsFree

    User behavior and product analytics

    1

    Categories

    2

    Total Tools

    0

    Enterprise

    0

    Mid-Market

    Assessment: Growing marketing technology adoption

    Sponsored

    Scripts & Styles

    25 Resources

    20
    Scripts
    5
    Styles
    8
    Async
    3
    Defer

    Top Script Sources

    251901.net(6)local(5)apis.google.com(3)googletagmanager.com(2)hpjp.mieru-ca.com(1)

    Website Identity

    251901.net

    21 years old
    Location detected: 🇯🇵 Japanvia ip
    Japan Registry Services Co., Ltd.ja

    Sponsored

    Last analyzed: 06 May 2026 at 11:36

    Historical Analysis & Change Tracking