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tristone.co.jp

https://tristone.co.jp· First analyzed 17 May 2026· Updated 17 May 2026
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tristone.co.jp
Desktop screenshot of tristone.co.jp
Mobile screenshot of tristone.co.jp
Mobile

Sponsored

Hosting Provider

KDDI

IP Address

27.85.187.177

Site Location

🇯🇵 Japanvia tld

Server Location

🇯🇵 Tomobuchichō, Japan

ASN

AS2516

Organization

KDDI

Server

Apache

Nameservers

ns-347.awsdns-43.com.ns-955.awsdns-55.net.ns-1260.awsdns-29.org.ns-2009.awsdns-59.co.uk.

Performance

73

Core Web Vitals

Weight

First Contentful Paint
6.5 s10%
Speed Index
8.5 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
18.9 MB
123 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
KDDI

Technology Stack

4 Technologies Detected

Analytics

2
Google Analytics
Segment

Libraries

1
jQueryv2.1.4

Web Servers

1
Apachev2.2.15

SEO Analysis

D41/100
12
7
3
Meta Tags4/15
Content10/12
Headings0/8
Technical9/21
E-E-A-T0/7
Images1/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
T
tristone.co.jptristone.co.jp

Tristone Entertainment Inc.

No description available for this page.

Title Length27 chars

Recommended: 50-60 chars (~161px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (3)

  • • Missing meta description — important for click-through rates in SERPs
  • • Missing H1 tag — every page should have exactly one H1
  • • Most images missing alt text (78/91) — 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

F30/100
Bot Access
20/25
Machine Read.
7/25
Schema Data
0/25
Citation
3/25

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:3%
Words:290
Token eff.:Too Short
Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary
Descriptive Headings
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.
B
77/100
10
Passed
2
Critical
0
Warnings
Images & Alt Text
20/20
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
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.
8/100
F
2.40 g
CO₂e / view
18.9 MB
Page Weight
5%
Cleaner Than
New Visitor
2.74 g
vs
Returning (cached)
1.37 g
Annual (10K/mo)
287.9 kg
Emission Segments
Data Center
536 mg
Network
576 mg
Device
1.29 g
Resource Breakdown
JavaScript
402.5 KB
Images
18.4 MB
CSS
71.3 KB
HTML
44.3 KB
Green Hosting Not Verified
KDDI
8 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
A

Security Score

81%Very Good
Static / Informational

HTTPS

No WAF

41d

Certificate Details

Type

Domain Validated (DV)

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

16.06.2025

Valid Until

27.06.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

tristone.co.jpwww.tristone.co.jp

SHA-256 Fingerprint

8D:1B:A0:D6:5B:57:57:F6:56:4A:A1:CD:B7:38:2F:AB:7F:97:7C:A5...

Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges
bytes
connection
close
content-length
45053
content-type
text/html
date
Sun, 17 May 2026 17:19:11 GMT
etag
"62196-affd-64e87d2d33825"
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

70

SPF
DKIM
DMARC

DMARC Policy

None (Monitor Only)

MX Records (2)

mail.tristone.co.jp
tristone.co.jp

Domain Information

tristone.co.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.
D
43/100
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=1040
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

ヒラギノ角ゴ Pro W3

WCAG AAA
64/100
Readability
/30
13/30

10px · LH 1.60

Hierarchy
/20
13/20

1.2x ratio · ✓ H1→H6

WCAG
/25
24/25

19.56:1 min contrast

Performance
/25
14/25

1 font

Heading Font

ヒラギノ角ゴ Pro W3

Sans12px

Body Font

ヒラギノ角ゴ Pro W3

Sans10px

Contrast Ratio

19.56:1

WCAG AAA (≥7:1)

Reading Comfort

Single Font Family

left aligned
12px
h1
10px
p

❌ Critical: 10px body text is too small. Minimum 14px, recommend 16px+.

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

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

✅ WCAG AAA contrast: All text meets 7:1 ratio (min 19.6:1).

✅ 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.

Buy on MyFontsFlesch 0

Color Palette

7 unique colors
Light
#ffffff
Background· 99.2%
#736856
Primary· 0.2%
#a59e91
Secondary· 0.2%
#dbd8d0
Secondary· 0.1%
#c4bfb4
Secondary· 0.1%
#e8e6e3
Secondary· 0.1%

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

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Scripts & Styles

26 Resources

20
Scripts
6
Styles
3
Async
0
Defer

Top Script Sources

local(14)youtube.com(2)maps.google.com(2)google-analytics.com(1)ssl.google-analytics.com(1)

Website Identity

tristone.co.jp

Location detected: 🇯🇵 Japanvia tld

Sponsored

Last analyzed: 17 May 2026 at 17:20

Historical Analysis & Change Tracking