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steinsgate.jp

https://steinsgate.jp· First analyzed 28 May 2026· Updated 28 May 2026
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steinsgate.jp
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Hosting Provider

XSERVER Inc.

IP Address

85.131.207.146

Site Location

🇯🇵 Japanvia tld

Server Location

🇯🇵 Chiyoda City, Japan

ASN

AS131965

Organization

XSERVER Inc.

Server

Nginx

Nameservers

ns4.xserver.jp.ns1.xserver.jp.ns3.xserver.jp.ns2.xserver.jp.+1 more

Performance

99

Core Web Vitals

Weight

First Contentful Paint
747 ms10%
Speed Index
971 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
4.6 MB
96 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
XSERVER Inc.

Technology Stack

9 Technologies Detected

Analytics

2
Google Analytics
Google Analytics 4

Libraries

1
jQueryv1.11.2

UI Components

1
Swiper

CSS Frameworks

1
Tailwind CSS

Icon Libraries

1
Font Awesome

Fonts

1
Google Fonts

Tag Managers

1
Google Tag Manager

Web Servers

1
Nginx

SEO Analysis

C63/100
17
6
0
Meta Tags13/15
Content7/12
Headings5/8
Technical14/21
E-E-A-T0/7
Images3/7
Links5/5
URL5/5
Social4/5
Freshness0/4
Mobile4/4
Indexability3/3
S
steinsgate.jpsteinsgate.jp

想定科学ADV『STEINS;GATE（シュタインズ・ゲート）』Official Website

『STEINS;GATE』は、志倉千代丸企画・原作による、99%の科学と1%のファンタジーをコンセプトに、現実に存在する科学的事象を物語の骨格として組み込んだSFサスペンス「科学アドベンチャーシリーズ」の第2弾として、2009年10月に発売されたゲームです。テレビアニメ化、劇場アニメ化に加えて、舞台化、コミカライ...

Description truncated.
Title Length48 chars

Recommended: 50-60 chars (~292px / 580px)

Description Length198 chars

Recommended: 120-160 chars

Issues (0)

    6 issues found

    Upgrade to view details

    Local SEO

    Local Search Readiness

    6/100
    Poor
    2 13 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.
    5/25
    Schema Data
    0/25
    Citation
    9/25

    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
    navheader/footer
    Text ratio:4%
    Words:137
    Token eff.:Too Short
    Sections/1K:65.7
    Depth:2/5

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary11w
    Descriptive Headingsavg 2.3w
    Canonical URL
    Open Graph3/3
    Twitter Card1/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (11)
    AI readiness recommendation preview...
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    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.
    B
    71/100
    11
    Passed
    5
    Critical
    1
    Warnings
    Images & Alt Text
    10/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    17/20
    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
    7/15
    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.
    27/100
    F
    585 mg
    CO₂e / view
    4.6 MB
    Page Weight
    15%
    Cleaner Than
    New Visitor
    669 mg
    vs
    Returning (cached)
    334 mg
    Annual (10K/mo)
    70.2 kg
    Emission Segments
    Data Center
    131 mg
    Network
    140 mg
    Device
    314 mg
    Resource Breakdown
    JavaScript
    83.8 KB
    Images
    3.6 MB
    CSS
    909.0 KB
    Fonts
    908 B
    HTML
    7.9 KB
    Other
    613 B
    Green Hosting Not Verified
    XSERVER Inc.
    7 recommendations
    • •Carbon footprint recommendation preview...
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    B

    Security Score

    71%Good
    Static / Informational

    HTTPS

    No WAF

    53d

    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

    22.04.2026

    Valid Until

    21.07.2026

    Subject Alternative Names (2)

    steinsgate.jpwww.steinsgate.jp

    SHA-256 Fingerprint

    3F:F9:CC:B8:E6:22:26:B6:61:3D:C9:67:42:C7:81:EA:3B:E1:6F:AD...

    Recommendations

    Security recommendation preview

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    Upgrade to view header details

    HTTP Headers

    Developer Console

    content-encoding
    ⚡ Brotli(br)
    content-type
    text/html
    date
    Thu, 28 May 2026 16:10:37 GMT
    etag
    W/"888a-65134043625cb"
    last-modified
    Thu, 07 May 2026 06:01:51 GMT
    server
    nginx
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    0

    SPF
    DKIM
    DMARC

    Domain Information

    steinsgate.jp

    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.
    C
    64/100
    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, user-scalable=yes
    1 recommendation
    • •Mobile compatibility recommendation preview...
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    Typography & Readability

    YakuHanJPs_Narrow

    WCAG Partial
    61/100
    Readability
    /30
    18/30

    18px · LH 2.00

    Hierarchy
    /20
    9/20

    0.9x ratio

    WCAG
    /25
    14/25

    1:1 min contrast

    Performance
    /25
    20/25

    1 font · 1 req

    Heading Font

    YakuHanJPs_Narrow

    Sans16px

    Body Font

    YakuHanJPs_Narrow

    Sans18px

    Contrast Ratio

    1:1

    22 issues

    Reading Comfort

    ~39 CPL

    Narrow lines
    16px
    h1
    18px
    h2
    23px
    h3
    18px
    p
    Minor Second
    Scale

    ✅ Excellent readability: 18px body text is ideal for all devices.

    ⚠️ Wide line spacing (2.00). 1.4–1.6 is optimal for body text.

    ⚠️ Partial contrast: 22 elements below WCAG AA threshold (min 1.0:1).

    ❌ Broken heading hierarchy: 2 level skip(s). Screen readers rely on sequential headings (h1→h2→h3).

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

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

    GGoogle FontsBuy on MyFonts

    Color Palette

    8 unique colors
    14.02:1 AAA Light
    #e9e8e8
    Other· 32.6%
    #191c1d
    Text· 12%
    #040303
    Primary· 7%
    #c4b1af
    Secondary· 4.6%

    Business & Marketing Stack

    3 Tools Detected

    Advanced

    Behavior Analytics

    2
    Google Tag ManagerFree
    Google AnalyticsFree

    User behavior and product analytics

    Social Media

    1
    Twitter/X WidgetsFree

    Social widgets and sharing tools

    2

    Categories

    3

    Total Tools

    0

    Enterprise

    0

    Mid-Market

    Assessment: Well-developed marketing technology stack

    Sponsored

    Scripts & Styles

    16 Resources

    11
    Scripts
    5
    Styles
    4
    Async
    0
    Defer

    Top Script Sources

    .(3)youtube.com(2)googletagmanager.com(2)platform.twitter.com(1)google-analytics.com(1)

    Website Identity

    steinsgate.jp

    Location detected: 🇯🇵 Japanvia tld
    ja

    Social Profiles

    FacebookX (Twitter)

    Sponsored

    Last analyzed: 28 May 2026 at 16:11

    Historical Analysis & Change Tracking