StackOptic
Back to Search
2121designsight.jp favicon

2121designsight.jp

https://2121designsight.jp· First analyzed 07 May 2026· Updated 07 May 2026
Export
2121designsight.jp
Desktop screenshot of 2121designsight.jp
Mobile screenshot of 2121designsight.jp
Mobile

Sponsored

Hosting Provider

SAKURA

IP Address

219.94.155.208

Site Location

🇯🇵 Japanvia tld

Server Location

🇯🇵 Osaka, Japan

ASN

AS9371

Organization

SAKURA

Server

Nginx

Nameservers

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

Performance

94

Core Web Vitals

Weight

First Contentful Paint
1.2 s10%
Speed Index
1.6 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
2.2 MB
59 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
SAKURA

Technology Stack

6 Technologies Detected

Analytics

2
Google Analytics
Google Analytics 4

Libraries

1
jQuery

UI Components

1
Slick Carousel

CSS Frameworks

1
Tailwind CSS

Web Servers

1
Nginx

SEO Analysis

C60/100
17
6
0
Meta Tags9/15
Content9/12
Headings8/8
Technical13/25
E-E-A-T0/7
Images4/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
2
2121designsight.jp2121designsight.jp

21_21 DESIGN SIGHT

21_21 DESIGN SIGHT は、デザインを通して世界を見る場所です。 三宅一生、佐藤卓、深澤直人の３人のディレクターを中心とした、デザインのためのリサーチセンターであり、デザインについて考える場所であり、ものづくりの現場です。建築は安藤忠雄によるものです。

Title Length18 chars

Recommended: 50-60 chars (~108px / 580px)

Description Length133 chars

Recommended: 120-160 chars

Issues (0)

    6 issues found

    Upgrade to view details

    Crawlability

    Sitemap
    robots.txt

    2 rules

    Local SEO

    Local Search Readiness

    8/100
    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

    F33/100
    Bot Access
    20/25
    Machine Read.
    8/25
    Schema Data
    0/25
    Citation
    5/25

    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:8%
    Words:246
    Token eff.:Too Short
    Sections/1K:138.2
    Depth:3/5

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary
    Descriptive Headingsavg 1.5w
    Canonical URL
    Open Graph0/3
    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.
    A
    85/100
    14
    Passed
    2
    Critical
    1
    Warnings
    Images & Alt Text
    20/20
    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
    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
    6/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    1 recommendation
    • •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.
    13/100
    E
    284 mg
    CO₂e / view
    2.2 MB
    Page Weight
    50%
    Cleaner Than
    New Visitor
    324 mg
    vs
    Returning (cached)
    162 mg
    Annual (10K/mo)
    34.1 kg
    Emission Segments
    Data Center
    63 mg
    Network
    68 mg
    Device
    152 mg
    Resource Breakdown
    JavaScript
    178.1 KB
    Images
    1.9 MB
    CSS
    132.7 KB
    HTML
    28.5 KB
    Green Hosting Not Verified
    SAKURA
    6 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    B

    Security Score

    71%Good
    Static / Informational

    HTTPS

    No WAF

    63d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Let's Encrypt

    Key Algorithm

    RSA (2048 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.2

    HTTP Protocol

    HTTP/2

    Valid From

    10.04.2026

    Valid Until

    09.07.2026

    Subject Alternative Names (2)

    2121designsight.jpwww.2121designsight.jp

    SHA-256 Fingerprint

    01:91:80:E9:BD:A8:0C:5D:64:41:18:19:96:02:A5:B2:CA:41:53:D2...

    Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    accept-ranges
    bytes
    content-type
    text/html
    date
    Thu, 07 May 2026 09:11:18 GMT
    server
    nginx
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    45

    SPF
    DKIM
    DMARC

    MX Records (2)

    mxjp2.nospamcloud.com
    mxjp1.nospamcloud.com

    Domain Information

    2121designsight.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.
    F
    38/100
    Not 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=1195,user-scalable=0
    3 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    meiryo

    WCAG Partial
    57/100
    Readability
    /30
    16/30

    14px · LH 1.71

    Hierarchy
    /20
    11/20
    WCAG
    /25
    14/25

    2.14:1 min contrast

    Performance
    /25
    16/25

    2 fonts

    Heading Font

    meiryo

    Sans0

    Body Font

    meiryo

    Sans14px

    Contrast Ratio

    2.14:1

    28 issues

    Reading Comfort

    Single Font Family

    left aligned
    16px
    h1
    16px
    h2
    16px
    h3
    16px
    h4
    14px
    p
    Minor Second
    Scale

    ⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

    ⚠️ Partial contrast: 28 elements below WCAG AA threshold (min 2.1:1).

    ❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

    ✅ Lean font stack: 2 font families keeps load times fast.

    ⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

    Buy on MyFonts

    Color Palette

    10 unique colors
    3.95:1 AA Large Light
    #ffffff
    Background· 17.2%
    #838077
    Other· 7.8%
    #2b95bf
    Primary· 30.8%
    #74554d
    Secondary· 10.9%
    #d6bf9d
    Secondary· 10.1%
    #ebe8d7
    Secondary· 5.2%
    #acbeb4
    Secondary· 4.5%
    #2b7ca6
    Accent· 4.1%

    Business & Marketing Stack

    1 Tools Detected

    Growing

    Behavior Analytics

    1
    Google AnalyticsFree

    User behavior and product analytics

    1

    Categories

    1

    Total Tools

    0

    Enterprise

    0

    Mid-Market

    Assessment: Growing marketing technology adoption

    Sponsored

    Scripts & Styles

    18 Resources

    9
    Scripts
    9
    Styles
    1
    Async
    0
    Defer

    Top Script Sources

    local(7)googletagmanager.com(1)player.vimeo.com(1)

    Website Identity

    2121designsight.jp

    info@2121designsight.jp
    Location detected: 🇯🇵 Japanvia tld
    ja

    Sponsored

    Last analyzed: 07 May 2026 at 09:11

    Historical Analysis & Change Tracking