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ohtabooks.com

https://ohtabooks.com· First analyzed 14 May 2026· Updated 14 May 2026
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ohtabooks.com
Desktop screenshot of ohtabooks.com
Mobile screenshot of ohtabooks.com
Mobile

Sponsored

Hosting Provider

SAKURA

IP Address

219.94.155.221

Site Location

🇯🇵 Japanvia ip

Server Location

🇯🇵 Osaka, Japan

ASN

AS9371

Organization

SAKURA

Server

Nginx

Nameservers

01.dnsv.jp.02.dnsv.jp.03.dnsv.jp.04.dnsv.jp.

Performance

74

Core Web Vitals

Weight

First Contentful Paint
3.7 s10%
Speed Index
4.8 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
200 KB
82 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Shopify
ecommerce
Shopify Theme
Shopify Theme

Detected Apps

Facebook ChannelInstagram ShoppingTikTok

Technology Stack

8 Technologies Detected

Analytics

3
Google Analytics
Google Analytics 4
Facebook Pixel

Libraries

1
jQueryv1.8.1

UI Components

1
Swiper

Icon Libraries

1
Font Awesome

Advertising

1
Google Ads

Web Servers

1
Nginx

SEO Analysis

C64/100
18
8
0
Meta Tags5/15
Content9/12
Headings8/8
Technical17/25
E-E-A-T3/7
Images4/7
Links5/5
URL5/5
Social4/5
Freshness0/4
Mobile1/4
Indexability3/3
O
ohtabooks.comohtabooks.com

太田出版

1985年設立の日本の出版社・太田出版の公式ウェブサイトです。コミック、カルチャー、実用書など幅広く刊行しています。

Title Length4 chars

Recommended: 50-60 chars (~24px / 580px)

Description Length58 chars

Recommended: 120-160 chars

Issues (0)

    8 issues found

    Upgrade to view details

    Crawlability

    Sitemap
    robots.txt

    23 rules

    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

    D45/100
    Bot Access
    20/25
    Machine Read.
    14/25
    Schema Data
    0/25
    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. listsnavheader/footer
    Text ratio:7%
    Words:364
    Token eff.:Optimal
    Sections/1K:57.7
    Depth:3/5

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary
    Descriptive Headingsavg 1w
    Canonical URL
    Open Graph3/3
    Twitter Card1/3
    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.
    B
    72/100
    10
    Passed
    3
    Critical
    1
    Warnings
    Images & Alt Text
    15/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    20/20
    Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
    Forms & Inputs
    10/15
    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
    3/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    3 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.
    46/100
    A+
    25 mg
    CO₂e / view
    200.0 KB
    Page Weight
    95%
    Cleaner Than
    New Visitor
    28 mg
    vs
    Returning (cached)
    14 mg
    Annual (10K/mo)
    3.0 kg
    Emission Segments
    Data Center
    6 mg
    Network
    6 mg
    Device
    13 mg
    Resource Breakdown
    JavaScript
    123.6 KB
    Images
    8.9 KB
    HTML
    67.5 KB
    Green Hosting Not Verified
    SAKURA
    5 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    F

    Security Score

    21%Critical
    Interactive

    HTTPS

    No WAF

    17d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Japan Registry Services Co., Ltd.

    Key Algorithm

    RSA (2048 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.2

    HTTP Protocol

    HTTP/2

    Valid From

    30.05.2025

    Valid Until

    31.05.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (2)

    ohtabooks.comwww.ohtabooks.com

    SHA-256 Fingerprint

    D9:EC:94:97:2D:DA:B2:08:05:F5:0A:13:97:FF:39:DB:C6:DF:C8:1C...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    accept-ranges
    bytes
    content-length
    68800
    content-type
    text/html
    date
    Thu, 14 May 2026 10:21:09 GMT
    etag
    "10cc0-651beee3083c6"
    last-modified
    Thu, 14 May 2026 03:45:42 GMT
    Good Warning Issue

    Email Infrastructure

    Google Workspace

    Score

    65

    SPF
    DKIM
    DMARC

    DMARC Policy

    None (Monitor Only)

    MX Records (6)

    aspmx.l.google.com
    www431b.sakura.ne.jp
    aspmx3.googlemail.com
    aspmx2.googlemail.com

    +2 more

    Domain Information

    ohtabooks.com

    Domain Age
    25y 3m

    Created

    06.02.2001

    Expires

    06.02.2027

    Last Updated

    21.01.2026

    Registrar

    GMO Internet Group, Inc. d/b/a Onamae.com

    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.
    D
    47/100
    Not Mobile Friendly2 breakpoints
    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, initial-scale=1.0, user-scalable=no
    5 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    ＭＳ Ｐゴシック

    WCAG Partial
    62/100
    Readability
    /30
    15/30

    13px · LH 1.50

    Hierarchy
    /20
    15/20

    0.87x ratio · ✓ H1→H6

    WCAG
    /25
    16/25

    1.51:1 min contrast

    Performance
    /25
    16/25

    1 font

    Heading Font

    ＭＳ Ｐゴシック

    Sans11px

    Body Font

    ＭＳ Ｐゴシック

    Sans13px

    Contrast Ratio

    1.51:1

    3 issues

    Reading Comfort

    Single Font Family

    left aligned
    11px
    h1
    14px
    h2
    13px
    h3
    13px
    p
    Minor Second
    Scale

    ❌ Critical: 13px body text is too small. Minimum 14px, recommend 16px+.

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

    ⚠️ Partial contrast: 3 elements below WCAG AA threshold (min 1.5:1).

    ✅ 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.

    Buy on MyFontsFlesch 66

    Color Palette

    11 unique colors
    15.83:1 AAA Light
    #ffffff
    Background· 43.99999999999999%
    #242222
    Other· 7.7%
    #eebfc4
    Primary· 10.9%
    #656880
    Secondary· 6.7%
    #cc7880
    Secondary· 5.2%
    #edb0a9
    Accent· 4.9%
    #4a302f
    Secondary· 4.9%
    #a1b5a7
    Secondary· 3.5%

    Business & Marketing Stack

    5 Tools Detected

    Enterprise

    Behavior Analytics

    1
    Google AnalyticsFree

    User behavior and product analytics

    Advertising

    2
    Google AdsEnterprise
    Facebook PixelMid-Market

    Ad platforms and retargeting pixels

    Social Media

    2
    Facebook SDKFree
    Twitter/X WidgetsFree

    Social widgets and sharing tools

    3

    Categories

    5

    Total Tools

    1

    Enterprise

    1

    Mid-Market

    Assessment: Sophisticated marketing and sales technology infrastructure

    Sponsored

    Scripts & Styles

    18 Resources

    15
    Scripts
    3
    Styles
    6
    Async
    0
    Defer

    Top Script Sources

    ohtabooks.com(5)zvhgul-zcmp.maillist-manage.jp(3)connect.facebook.net(2)platform.twitter.com(1)uh.nakanohito.jp(1)

    Website Identity

    ohtabooks.com

    25 years old
    Location detected: 🇯🇵 Japanvia ip
    GMO Internet Group, Inc. d/b/a Onamae.com📧 Google Workspaceja

    Sponsored

    Last analyzed: 14 May 2026 at 10:21

    Historical Analysis & Change Tracking