diners.co.jp

https://diners.co.jp· First analyzed 02 May 2026· Updated 02 May 2026

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diners.co.jp

Mobile

Sponsored

Hosting Provider

TOKAI

IP Address

27.121.4.206

Site Location

🇯🇵 Japanvia tld

Server Location

🇯🇵 Yaizu, Japan

ASN

AS10010

Organization

TOKAI

Server

Apache

CDN

Akamai

WAF

Akamai

Nameservers

ns-384.awsdns-48.com.ns-679.awsdns-20.net.ns-1203.awsdns-22.org.ns-1711.awsdns-21.co.uk.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.4 s10%

Speed Index

1.9 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

1.9 MB

123 requests

Image Optimization

Responsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Adobe Experience Manager

Technology Stack

15 Technologies Detected

Advertising

Google Ads Twitter Ads LinkedIn Ads Microsoft Advertising Criteo Taboola

Analytics

Libraries

UI Components

CSS Frameworks

Tag Managers

Web Servers

SEO Analysis

D51/100

Meta Tags7/15

Content6/12

Headings5/8

Technical14/21

E-E-A-T0/7

Images1/7

Links5/5

URL5/5

Social1/5

Freshness0/4

Mobile4/4

Indexability3/3

diners.co.jpdiners.co.jp

クレジットカードのダイナースクラブ

日本初のクレジットカードダイナースクラブウェブサイト。クレジットカードのダイナースクラブは、確かなキュレーション力で個人・法人のお客様へオーダーメイドのサービスをご提供します。

Title Length17 chars

Recommended: 50-60 chars (~105px / 580px)

Description Length90 chars

Recommended: 120-160 chars

Issues (1)

• Most images missing alt text (29/41) — critical for accessibility and SEO

10 issues found

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Local SEO

Local Search Readiness

3/100

Poor

1 14 2

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

Sponsored

AI & LLM Readiness

F32/100

Bot Access

20/25

Machine Read.

3/25

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:1%

Words:72

Token eff.:Too Short

Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary12w

Descriptive Headings

Canonical URL

Open Graph1/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

AI readiness recommendation preview...

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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.

66/100

Passed

Critical

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

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

5/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

4 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.

38/100

245 mg

CO₂e / view

1.9 MB

Page Weight

50%

Cleaner Than

New Visitor

280 mg

Returning (cached)

140 mg

Annual (10K/mo)

29.4 kg

Emission Segments

Data Center

55 mg

Network

59 mg

Device

132 mg

Resource Breakdown

JavaScript

272.8 KB

Images

1.6 MB

CSS

54.0 KB

HTML

7.4 KB

Other

3.2 KB

Green Hosting Not Verified

TOKAI

4 recommendations

•Carbon footprint recommendation preview...

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Security Score

26%Critical

Interactive

HTTPS

WAF

302d

Certificate Details

Type

Extended Validation (EV)

Certificate Authority

DigiCert Inc

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

28.01.2026

Valid Until

28.02.2027

OCSP Stapling

Enabled

Subject Alternative Names (2)

www.sumitclub.jpwww.diners.co.jp

SHA-256 Fingerprint

49:5D:02:0B:6C:A6:63:0F:D5:FA:A1:F6:09:EF:BF:5B:D9:75:16:65...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

cache-control

🟡 300s(max-age=300, public, must-revalidate)

connection

keep-alive

content-encoding

📦 Gzip(gzip)

content-length

7429

content-type

text/html

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

Domain Information

diners.co.jp

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

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.

68/100

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,minimum-scale=1.0

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

ヒラギノ角ゴ Pro W3

WCAG Partial

50/100

Readability

/30

17/30

15px · LH 1.60

Hierarchy

/20

6/20

1.47x ratio

WCAG

/25

12/25

2.93:1 min contrast

Performance

/25

15/25

1 font · 1 req

Heading Font

ヒラギノ角ゴ Pro W3

Sans22px

Body Font

ヒラギノ角ゴ Pro W3

Sans15px

Contrast Ratio

2.93:1

3 issues

Reading Comfort

Single Font Family

left aligned

22px

18px

15px

⚠️ Small text: 15px may strain on mobile. Use ≥16px for WCAG compliance.

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

⚠️ Partial contrast: 3 elements below WCAG AA threshold (min 2.9:1).

❌ 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.

❌ Pure vw font sizes: Viewport units alone break browser zoom (WCAG 1.4.4 fail). Use clamp(rem, vw, rem).

Buy on MyFonts

Color Palette

14 unique colors

Light

#ffffff

Background· 21.599999999999998%

#a37744

Secondary· 9.8%

#cdd2b9

Secondary· 9.6%

#2563a6

Accent· 9.3%

#134178

Primary· 7.7%

#424736

Secondary· 7.5%

#2b82ae

Primary· 7.4%

#0e2738

Accent· 7.3%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

27 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(8)px.ladsp.com(4)img.ak.impact-ad.jp(2)dmp.im-apps.net(2)s.yimg.jp(2)

Website Identity

diners.co.jp

Location detected: 🇯🇵 Japanvia tld

Sponsored

Last analyzed: 02 May 2026 at 08:39

Historical Analysis & Change Tracking