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arttowermito.or.jp

https://arttowermito.or.jp· First analyzed 13 May 2026· Updated 13 May 2026
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arttowermito.or.jp
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Mobile

Sponsored

Hosting Provider

Open Computer Network

IP Address

122.17.137.219

Site Location

🇯🇵 Japanvia tld

Server Location

🇯🇵 Chiyoda City, Japan

ASN

AS4713

Organization

Open Computer Network

Server

Nginx

Nameservers

mwns1.customer.ne.jp.mwns2.customer.ne.jp.

Performance

96

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%
10.4 MB
117 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Open Computer Network

Technology Stack

10 Technologies Detected

UI Components

2
SwiperSlick Carousel

Analytics

2
Google Analytics
Google Analytics 4

Libraries

1
jQueryv3.6.0

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

D58/100
16
9
0
Meta Tags8/15
Content8/12
Headings8/8
Technical10/21
E-E-A-T0/7
Images4/7
Links5/5
URL5/5
Social4/5
Freshness0/4
Mobile3/4
Indexability3/3
A
arttowermito.or.jparttowermito.or.jp

水戸芸術館

水戸芸術館の公式サイトです。コンサートホールATM、ACM劇場、現代美術ギャラリーを備えた複合文化施設で、自主企画による多彩で魅力あふれる事業を展開しています。また地域の文化活動の拠点として市民と連携して行う様々な企画も実施しています。

Title Length5 chars

Recommended: 50-60 chars (~31px / 580px)

Description Length118 chars

Recommended: 120-160 chars

Issues (0)

    9 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

    F39/100
    Bot Access
    20/25
    Machine Read.
    8/25
    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:3%
    Words:224
    Token eff.:Too Short
    Sections/1K:40.2
    Depth:3/5

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary13w
    Descriptive Headingsavg 1.3w
    Canonical URL
    Open Graph3/3
    Twitter Card1/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (9)
    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
    79/100
    12
    Passed
    4
    Critical
    1
    Warnings
    Images & Alt Text
    13/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    18/20
    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
    9/15
    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.
    16/100
    F
    1.32 g
    CO₂e / view
    10.4 MB
    Page Weight
    5%
    Cleaner Than
    New Visitor
    1.51 g
    vs
    Returning (cached)
    754 mg
    Annual (10K/mo)
    158.4 kg
    Emission Segments
    Data Center
    295 mg
    Network
    317 mg
    Device
    708 mg
    Resource Breakdown
    JavaScript
    155.9 KB
    Images
    9.8 MB
    CSS
    130.2 KB
    Fonts
    30.8 KB
    HTML
    11.7 KB
    Other
    293.1 KB
    Green Hosting Not Verified
    Open Computer Network
    8 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    F

    Security Score

    21%Critical
    Interactive

    HTTPS

    No WAF

    329d

    Certificate Details

    Type

    Organization Validated (OV)

    Certificate Authority

    CloudSecure Corporation

    Key Algorithm

    RSA (2048 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/2

    Valid From

    07.03.2026

    Valid Until

    07.04.2027

    OCSP Stapling

    Enabled

    Subject Alternative Names (2)

    www.arttowermito.or.jparttowermito.or.jp

    SHA-256 Fingerprint

    09:08:11:B8:61:6E:3A:02:D7:5B:89:8D:CF:D1:72:8B:F2:41:20:AB...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    content-encoding
    📦 Gzip(gzip)
    content-type
    text/html
    date
    Wed, 13 May 2026 08:21:24 GMT
    server
    nginx
    vary
    Accept-Encoding
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    65

    SPF
    DKIM
    DMARC

    DMARC Policy

    None (Monitor Only)

    MX Records (2)

    mwpremgw1.ocn.ad.jp
    mwpremgw2.ocn.ad.jp

    Domain Information

    arttowermito.or.jp

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Cookie Consent Banner
    Privacy Policy
    Terms of Service

    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
    62/100
    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
    2 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Noto Sans Japanese

    WCAG Partial
    55/100
    Readability
    /30
    15/30

    12px · LH 1.60

    Hierarchy
    /20
    10/20

    1.83x ratio

    WCAG
    /25
    15/25

    1:1 min contrast

    Performance
    /25
    15/25

    1 font · 2 req

    Heading Font

    Noto Sans Japanese

    Sans22px

    Body Font

    Noto Sans Japanese

    Sans12px

    Contrast Ratio

    1:1

    9 issues

    Reading Comfort

    ~64 CPL

    Optimal (45–75)
    22px
    h1
    22px
    h2
    22px
    h3
    12px
    p
    Minor Second
    Scale

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

    ✅ Optimal line spacing: 1.60 ratio (ideal range 1.4–1.6).

    ✅ Optimal line length: ~64 chars/line (ideal 45–75 CPL).

    ⚠️ Partial contrast: 9 elements below WCAG AA threshold (min 1.0:1).

    ⚠️ Minor heading issue: 0 level skip(s) detected. Maintain sequential order for screen readers.

    ✅ Modern fluid typography: clamp() with rem units ensures zoom accessibility (WCAG 1.4.4).

    GGoogle FontsBuy on MyFontsFluid Type (rem)

    Color Palette

    10 unique colors
    Light
    #ffffff
    Background· 33%
    #5a385f
    Secondary· 20.7%
    #050204
    Primary· 6.4%
    #e9d3d3
    Secondary· 5.5%
    #736787
    Secondary· 5.1%
    #aa3039
    Accent· 4.9%
    #b89389
    Secondary· 4.9%
    #351e2c
    Secondary· 3.9%

    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

    30 Resources

    20
    Scripts
    10
    Styles
    5
    Async
    0
    Defer

    Top Script Sources

    cdnjs.cloudflare.com(5)local(4)cse.google.com(2)googletagmanager.com(2)s.yimg.jp(1)

    Website Identity

    arttowermito.or.jp

    Location detected: 🇯🇵 Japanvia tld
    ja

    Sponsored

    Last analyzed: 13 May 2026 at 08:22

    Historical Analysis & Change Tracking