bluelug.com

https://bluelug.com· First analyzed 11 May 2026· Updated 11 May 2026

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bluelug.com

Mobile

Sponsored

Hosting Provider

SAKURA Internet Inc.

IP Address

153.126.156.90

Site Location

🇯🇵 Japanvia phone

Server Location

🇯🇵 Sendai, Japan

ASN

AS7684

Organization

SAKURA Internet Inc.

Server

Apache

Nameservers

ns-1964.awsdns-53.co.uk.ns-952.awsdns-55.net.ns-1039.awsdns-01.org.ns-18.awsdns-02.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

2.3 s10%

Speed Index

3.0 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

1.6 MB

38 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Hybrid

🔀 Hybrid

Frontend

Framework

Nuxt.js

Infrastructure

Hosting

SAKURA Internet Inc.

Technology Stack

7 Technologies Detected

Analytics

Meta Frameworks

CSS Frameworks

Icon Libraries

Fonts

Web Servers

SEO Analysis

D51/100

Meta Tags7/15

Content10/12

Headings3/8

Technical13/25

E-E-A-T0/7

Images2/7

Links2/5

URL5/5

Social3/5

Freshness0/4

Mobile3/4

Indexability3/3

bluelug.combluelug.com

BLUE LUG

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Description truncated.

Title Length8 chars

Recommended: 50-60 chars (~52px / 580px)

Description Length409 chars

Recommended: 120-160 chars

Issues (1)

• Missing H1 tag — every page should have exactly one H1

14 issues found

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Crawlability

Sitemap

Type: index

7 URLs

7 sub-sitemaps

robots.txt

3 rules

Local SEO

Local Search Readiness

17/100

Poor

5 10 2

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

Sponsored

AI & LLM Readiness

F35/100

Bot Access

20/25

Machine Read.

9/25

Schema Data

0/25

Citation

6/25

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:4%

Words:677

Token eff.:Optimal

Structured Data

No Schema

Citation Readiness

Opening Summary10w

Descriptive Headingsavg 3.4w

Canonical URL

Open Graph3/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (12)

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

18/20

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

Semantic Structure

8/20

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.

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.

53/100

208 mg

CO₂e / view

1.6 MB

Page Weight

60%

Cleaner Than

New Visitor

238 mg

Returning (cached)

119 mg

Annual (10K/mo)

24.9 kg

Emission Segments

Data Center

46 mg

Network

50 mg

Device

112 mg

Resource Breakdown

JavaScript

169.4 KB

Images

1.5 MB

Fonts

2.1 KB

HTML

2.1 KB

Other

3.9 KB

Green Hosting Not Verified

SAKURA Internet Inc.

4 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

86%Very Good

Static / Informational

HTTPS

No WAF

88d

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

08.07.2025

Valid Until

07.08.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

bluelug.comwww.bluelug.com

SHA-256 Fingerprint

91:78:29:12:60:E0:13:6B:1C:8A:67:92:DA:5F:C2:0C:47:EF:C4:B4...

Recommendations

Security recommendation preview

Upgrade to view recommendations

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HTTP Headers

Developer Console

accept-ranges

bytes

cache-control

🔴 No Cache(no-store, no-cache, must-revalidate, max-age=0)

connection

Keep-Alive

content-encoding

📦 Gzip(gzip)

content-length

1832

content-type

text/html

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

mx01.lolipop.jp

Domain Information

bluelug.com

Domain Age

19y 7m

Created

11.10.2006

Expires

11.10.2026

Last Updated

10.09.2025

Registrar

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

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.

75/100

Mobile Friendly36 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

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Roboto + Source Sans Pro

WCAG Partial

64/100

Readability

/30

19/30

16px · LH --

Hierarchy

/20

8/20

WCAG

/25

17/25

1:1 min contrast

Performance

/25

20/25

2 fonts · 1 req

Heading Font

Roboto

Sans

Body Font

Source Sans Pro

Sans16px

Contrast Ratio

1:1

11 issues

Reading Comfort

~44 CPL

Narrow lines

34px

14px

16px

✅ Excellent readability: 16px body text is ideal for all devices.

⚠️ Partial contrast: 11 elements below WCAG AA threshold (min 1.0:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

✅ Lean font stack: 2 font families keeps load times fast.

✅ Smart font loading: font-display: swap prevents invisible text during load (FOIT).

GGoogle FontsFlesch 56

Color Palette

10 unique colors

5.4:1 AA Dark

#616c70

Other· 19.200000000000003%

#ffffff

Text· 12.9%

#7996a4

Primary· 10.5%

#8eb1be

Secondary· 7.5%

#5f5149

Secondary· 5%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

20 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(18)googletagmanager.com(1)

Website Identity

bluelug.com

international@bluelug.com

+81-03-6662-5042

19 years old

Location detected: 🇯🇵 Japanvia phone

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

Social Profiles

Instagram YouTube

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Last analyzed: 11 May 2026 at 06:29

Historical Analysis & Change Tracking