jrtk.jp

https://jrtk.jp· First analyzed 13 May 2026· Updated 13 May 2026

Export

jrtk.jp

Mobile

Sponsored

Hosting Provider

JR East Japan Information Systems Company

IP Address

157.74.66.95

Site Location

🇯🇵 Japanvia tld

Server Location

🇯🇵 Chuo, Japan

ASN

AS131932

Organization

JR East Japan Information Systems Company

Nameservers

ns2.dns.ne.jp.ns1.dns.ne.jp.

Performance

Core Web Vitals

Weight

First Contentful Paint

2.5 s10%

Speed Index

3.2 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

10.9 MB

80 requests

Image Optimization

WebP

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

JR East Japan Information Systems Company

Technology Stack

8 Technologies Detected

Analytics

Libraries

UI Components

CSS Frameworks

Fonts

Tag Managers

SEO Analysis

C66/100

Meta Tags10/15

Content10/12

Headings8/8

Technical15/21

E-E-A-T0/7

Images2/7

Links5/5

URL5/5

Social4/5

Freshness0/4

Mobile4/4

Indexability3/3

jrtk.jpjrtk.jp

JR東日本グループのデベロッパー株式会社ジェイアール東日本都市開発

JR東日本グループのデベロッパー「ジェイアール東日本都市開発」のホームページ。会社案内、当社の事業、ショピングセンター、店舗案内、物件検索、採用情報等をご覧いただけます。

Title Length34 chars

Recommended: 50-60 chars (~210px / 580px)

Description Length85 chars

Recommended: 120-160 chars

Issues (1)

• Most images missing alt text (2/2) — critical for accessibility and SEO

7 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

D45/100

Bot Access

20/25

Machine Read.

14/25

Schema Data

1/25

Citation

10/25

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:308

Token eff.:Optimal

Sections/1K:19.5

Depth:3/5

Structured Data

1 JSON-LD

BreadcrumbList

Citation Readiness

Opening Summary10w

Descriptive Headingsavg 1.5w

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.

65/100

Passed

Critical

Warnings

Images & Alt Text

5/20

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

1/15

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.

9/100

1.38 g

CO₂e / view

10.9 MB

Page Weight

Cleaner Than

New Visitor

1.57 g

Returning (cached)

787 mg

Annual (10K/mo)

165.4 kg

Emission Segments

Data Center

308 mg

Network

331 mg

Device

740 mg

Resource Breakdown

JavaScript

257.9 KB

Images

509.3 KB

CSS

10.1 MB

Fonts

1.8 KB

HTML

42.8 KB

Green Hosting Not Verified

JR East Japan Information Systems Company

9 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

56%Poor

Interactive

HTTPS

No WAF

256d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert Inc

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

24.12.2025

Valid Until

24.01.2027

OCSP Stapling

Enabled

Subject Alternative Names (2)

www.jrtk.jpjrtk.jp

SHA-256 Fingerprint

0E:5B:9D:7C:E1:D8:38:39:16:06:2E:72:CC:20:19:BE:04:B8:D8:0E...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

connection

Keep-Alive

content-type

text/html; charset=UTF-8

date

Wed, 13 May 2026 20:15:29 GMT

keep-alive

timeout=5, max=100

strict-transport-security

max-age=15768000

transfer-encoding

chunked

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

mail.jrtk.jp

Domain Information

jrtk.jp

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

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.

57/100

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,initial-scale=1.0

2 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Hiragino Kaku Gothic ProN

WCAG AA

59/100

Readability

/30

12/30

14px · LH 2.00

Hierarchy

/20

17/20

✓ H1→H6 order

WCAG

/25

15/25

4.87:1 min contrast

Performance

/25

15/25

2 fonts · 1 req

Heading Font

Hiragino Kaku Gothic ProN

Sans0

Body Font

Hiragino Kaku Gothic ProN

Sans14px

Contrast Ratio

4.87:1

WCAG AA (≥4.5:1)

Reading Comfort

~37 CPL

Narrow lines

16px

24px

14px

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

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

❌ Very complex text: Flesch score 0/100. Consider shorter sentences and simpler words.

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 4.9:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

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

GGoogle Fonts Buy on MyFontsFlesch 0

Color Palette

10 unique colors

3.85:1 AA Large Light

#ffffff

Background· 41.2%

#888082

Other· 5.6%

#f3f2eb

Primary· 14.8%

#dac2ba

Secondary· 7.7%

#cfddd3

Secondary· 6.1%

#a7beb6

Secondary· 5%

#b4dac3

Secondary· 4.6%

#e6dfe7

Secondary· 4.6%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

18 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(7)googletagmanager.com(2)google-analytics.com(1)

Website Identity

jrtk.jp

Location detected: 🇯🇵 Japanvia tld

Sponsored

Last analyzed: 13 May 2026 at 20:16

Historical Analysis & Change Tracking

jrtk.jp

JR東日本グループのデベロッパー 株式会社ジェイアール東日本都市開発

Accessibility

Carbon Footprint

Mobile Compatibility

Color Palette

jrtk.jp

JR東日本グループのデベロッパー株式会社ジェイアール東日本都市開発