sekkaku.net

https://sekkaku.net· First analyzed 16 May 2026· Updated 16 May 2026

Export

sekkaku.net

Mobile

Sponsored

Hosting Provider

SAKURA Internet Inc.

IP Address

153.127.13.51

Site Location

🇯🇵 Japanvia ip

Server Location

🇯🇵 Osaka, Japan

ASN

AS7684

Organization

SAKURA Internet Inc.

Server

Apache

Nameservers

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

Performance

100

Core Web Vitals

Weight

First Contentful Paint

267 ms10%

Speed Index

347 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

16 KB

8 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

SAKURA Internet Inc.

Technology Stack

1 Technologies Detected

Web Servers

Apache

SEO Analysis

F33/100

Meta Tags5/15

Content3/12

Headings0/8

Technical10/21

E-E-A-T0/7

Images4/7

Links2/5

URL5/5

Social0/5

Freshness0/4

Mobile1/4

Indexability3/3

sekkaku.netsekkaku.net

せっかくネット

せっかくネットの日本語ドメイン用プレビューサイトです。メインページへお進み頂く為の入り口です。

Title Length7 chars

Recommended: 50-60 chars (~43px / 580px)

Description Length47 chars

Recommended: 120-160 chars

Issues (3)

• Very thin content (12 words). Search engines need substantial content for ranking.
• Missing H1 tag — every page should have exactly one H1
• Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

13 issues found

Upgrade to view details

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

F26/100

Bot Access

20/25

Machine Read.

1/25

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

Text ratio:5%

Words:11

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 (12)

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.

66/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

6/20

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.

57/100

A+

2 mg

CO₂e / view

16.5 KB

Page Weight

95%

Cleaner Than

New Visitor

2 mg

Returning (cached)

1 mg

Annual (10K/mo)

240 g

Emission Segments

Data Center

<0.001 g

Network

<0.001 g

Device

1 mg

Resource Breakdown

Images

12.4 KB

CSS

2.5 KB

HTML

1.6 KB

Green Hosting Not Verified

SAKURA Internet Inc.

4 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

76%Good

Static / Informational

HTTPS

No WAF

74d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

30.04.2026

Valid Until

29.07.2026

Subject Alternative Names (9)

ad.sekkaku.netbbs.sekkaku.netcard.sekkaku.netcount.sekkaku.netfm.sekkaku.netfortune.sekkaku.netsekkaku.netssl.sekkaku.net+1 more

SHA-256 Fingerprint

68:25:D4:88:C7:07:7C:11:C0:E1:49:CF:D1:9F:A4:FD:30:5A:43:6C...

Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

content-encoding

📦 Gzip(gzip)

content-length

1306

content-type

text/html

date

Sat, 16 May 2026 06:49:59 GMT

server

Apache

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (5)

alt1.aspmx.l.google.com

aspmx3.googlemail.com

aspmx2.googlemail.com

alt2.aspmx.l.google.com

+1 more

Domain Information

sekkaku.net

Domain Age

26y 9m

Created

24.08.1999

Expires

24.08.2027

Last Updated

28.04.2022

Registrar

GMO Internet Group, Inc. d/b/a Onamae.com

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.

27/100

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.

5 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

ＭＳゴシック

WCAG AAA

58/100

Readability

/30

13/30

12px · LH --

Hierarchy

/20

10/20

WCAG

/25

21/25

9.4:1 min contrast

Performance

/25

14/25

1 font

Heading Font

ＭＳゴシック

Body Font

ＭＳゴシック

Sans12px

Contrast Ratio

9.4:1

WCAG AAA (≥7:1)

Reading Comfort

~92 CPL

Wide lines

12px

❌ Critical: 12px body text is too small. Minimum 14px, recommend 16px+.

⚠️ Wide lines: ~92 chars/line. Use max-width: 65ch for comfortable reading.

✅ WCAG AAA contrast: All text meets 7:1 ratio (min 9.4:1).

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

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

Buy on MyFonts

Color Palette

5 unique colors

4.27:1 AA Large Light

#ffffff

Background· 94.50000000000001%

#7a7987

Other· 0.7%

Sponsored

Website Identity

sekkaku.net

26 years old

Location detected: 🇯🇵 Japanvia ip

GMO Internet Group, Inc. d/b/a Onamae.com📧 Google Workspaceja-JP

Sponsored

Last analyzed: 16 May 2026 at 06:50

Historical Analysis & Change Tracking