kestrel.jp

https://kestrel.jp· First analyzed 03 May 2026· Updated 03 May 2026

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kestrel.jp

Mobile

Sponsored

Hosting Provider

SRS SAKURA Internet Inc.

IP Address

210.224.185.56

Site Location

🇯🇵 Japanvia tld

Server Location

🇯🇵 Osaka, Japan

ASN

AS9371

Organization

SRS SAKURA Internet Inc.

Server

Nginx

Nameservers

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

Performance

100

Core Web Vitals

Weight

First Contentful Paint

532 ms10%

Speed Index

692 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

23 KB

1 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

SRS SAKURA Internet Inc.

Technology Stack

1 Technologies Detected

Web Servers

Nginx

SEO Analysis

F32/100

Meta Tags4/15

Content0/12

Headings6/8

Technical7/21

E-E-A-T0/7

Images4/7

Links2/5

URL5/5

Social0/5

Freshness0/4

Mobile1/4

Indexability3/3

kestrel.jpkestrel.jp

さくらのレンタルサーバ

No description available for this page.

Title Length11 chars

Recommended: 50-60 chars (~68px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (3)

• Missing meta description — important for click-through rates in SERPs
• Very thin content (15 words). Search engines need substantial content for ranking.
• Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

13 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.

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AI & LLM Readiness

F26/100

Bot Access

20/25

Machine Read.

4/25

Schema Data

0/25

Citation

2/25

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

Text ratio:1%

Words:14

Token eff.:Too Short

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 (11)

AI readiness recommendation preview...

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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.

74/100

Passed

Critical

Warnings

Images & Alt Text

20/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

14/20

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.

1 recommendation

•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.

50/100

A+

3 mg

CO₂e / view

23.2 KB

Page Weight

95%

Cleaner Than

New Visitor

3 mg

Returning (cached)

2 mg

Annual (10K/mo)

348 g

Emission Segments

Data Center

<0.001 g

Network

<0.001 g

Device

2 mg

Resource Breakdown

HTML

23.2 KB

Green Hosting Not Verified

SRS SAKURA Internet Inc.

5 recommendations

•Carbon footprint recommendation preview...

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Security Score

0%Critical

No SSL

No WAF

N/A

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HTTP Headers

Developer Console

content-type

text/html

date

Sun, 03 May 2026 06:43:07 GMT

server

nginx

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

kestrel.jp

Domain Information

kestrel.jp

DNSSEC

Not Enabled

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.

38/100

Not Mobile Friendly

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.

3 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Times New Roman

WCAG Partial

65/100

Readability

/30

17/30

10px · LH 1.40

Hierarchy

/20

15/20

1.4x ratio · ✓ H1→H6

WCAG

/25

19/25

2.85:1 min contrast

Performance

/25

14/25

1 font

Heading Font

Times New Roman

Serif14px

Body Font

Times New Roman

Serif10px

Contrast Ratio

2.85:1

1 issue

Reading Comfort

Single Font Family

left aligned

14px

10px

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

✅ Optimal line spacing: 1.40 ratio (ideal range 1.4–1.6).

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

✅ 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.

✅ Lean font stack: 1 font families keeps load times fast.

Buy on MyFonts

Color Palette

5 unique colors

3.12:1 AA Large Light

#ffffff

Background· 96.89999999999999%

#9a8f95

Other· 0.6%

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Website Identity

kestrel.jp

Location detected: 🇯🇵 Japanvia tld

Sponsored

Last analyzed: 03 May 2026 at 06:43

Historical Analysis & Change Tracking