isvr.or.jp

https://isvr.or.jp· First analyzed 24 May 2026· Updated 24 May 2026

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isvr.or.jp

Mobile

Sponsored

Hosting Provider

Super.so

super.so

IP Address

103.82.32.139

Site Location

🇯🇵 Japanvia tld

Server Location

🇻🇳 Go Vap, Vietnam

ASN

AS38733

Organization

SuperHost Company Limited

Server

LiteSpeed

Nameservers

ns1.xserver.jp.ns5.xserver.jp.ns3.xserver.jp.ns2.xserver.jp.+1 more

Performance

Core Web Vitals

Weight

First Contentful Paint

2.3 s10%

Speed Index

2.9 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

6.5 MB

77 requests

Image Optimization

WebP

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPressv7.0

cms

ISVRv1.0Custom

by Weable Team

View Theme

Technology Stack

13 Technologies Detected

Plugins

Libraries

UI Components

Slick Carousel Fancybox

CSS Frameworks

Payments

Web Servers

Languages

SEO Analysis

C62/100

Meta Tags4/15

Content12/12

Headings3/8

Technical20/25

E-E-A-T0/7

Images2/7

Links5/5

URL5/5

Social3/5

Freshness4/4

Mobile4/4

Indexability0/3

isvr.or.jpisvr.or.jp

Trang chủ - 小型船舶再活用計画機構

No description available for this page.

Title Length23 chars

Recommended: 50-60 chars (~142px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (4)

• 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 (22/26) — critical for accessibility and SEO

12 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

6 URLs

6 sub-sitemaps

robots.txt

3 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

22/100

Needs Work

6 11 1

Sponsored

AI & LLM Readiness

D47/100

Bot Access

20/25

Machine Read.

11/25

Schema Data

4/25

Citation

12/25

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:13%

Words:2,109

Token eff.:Optimal

Sections/1K:10.4

Depth:2/5

Structured Data

4 JSON-LD

WebSiteBreadcrumbListSearchAction

Citation Readiness

Opening Summary765w

Descriptive Headingsavg 6.9w

Canonical URL

Open Graph1/3

Twitter Card1/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (8)

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.

81/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

13/20

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

15/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

3/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

2 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.

22/100

827 mg

CO₂e / view

6.5 MB

Page Weight

Cleaner Than

New Visitor

946 mg

Returning (cached)

473 mg

Annual (10K/mo)

99.3 kg

Emission Segments

Data Center

185 mg

Network

199 mg

Device

444 mg

Resource Breakdown

JavaScript

130.6 KB

Images

5.4 MB

CSS

1.0 MB

HTML

17.0 KB

Other

461 B

Green Hosting Not Verified

Super.so

7 recommendations

•Carbon footprint recommendation preview...

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Security Score

0%Critical

Critical / Transactional

HTTPS

No WAF

86d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

21.05.2026

Valid Until

19.08.2026

Subject Alternative Names (1)

isvr.or.jp

SHA-256 Fingerprint

24:AB:6C:17:78:D7:89:B7:B5:5E:71:F4:77:2B:97:A1:3D:84:49:2E...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=2592000, h3-29=":443"; ma=2592000, h3-Q050=":4...

cache-control

🔴 No Cache(no-store, no-cache, must-revalidate)

content-encoding

📦 Gzip(gzip)

content-length

17107

content-type

text/html; charset=UTF-8

date

Sun, 24 May 2026 20:54:53 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

isvr.or.jp

Domain Information

isvr.or.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.

65/100

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, shrink-to-fit=no

3 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Merriweather + Inter

WCAG Partial

56/100

Readability

/30

26/30

16px · LH 1.80

Hierarchy

/20

4/20

WCAG

/25

10/25

1:1 min contrast

Performance

/25

16/25

2 fonts · 8 req

Heading Font

Merriweather

Serif

Body Font

Inter

Sans16px

Contrast Ratio

1:1

18 issues

Reading Comfort

~39 CPL

Narrow lines

40px

28px

16px

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

✅ Easy to read: Flesch score 77/100 — accessible to general audiences.

⚠️ Partial contrast: 18 elements below WCAG AA threshold (min 1.0:1).

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

⚠️ Text justify detected: Justified text creates uneven word spacing, hurting readability on web.

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

Buy on MyFontsFlesch 77

Color Palette

13 unique colors

7.12:1 AAA Light

#ffffff

Background· 41%

#555956

Other· 4.9%

#121d1f

Secondary· 6.9%

#ceb994

Secondary· 6.3%

#ac9e8a

Secondary· 6.3%

#213937

Primary· 5.8%

#978266

Secondary· 5.4%

#58666b

Secondary· 5.1%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

isvr.or.jp(17)code.jquery.com(2)paypal.com(1)

Website Identity

Trang chủ - 小型船舶再活用計画機構

特定非営利活動法人(NPO)

isvr.or.jp/

Location detected: 🇯🇵 Japanvia tld

vi-VN

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Last analyzed: 24 May 2026 at 20:55

Historical Analysis & Change Tracking