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ospn.jp

https://ospn.jp· First analyzed 14 May 2026· Updated 14 May 2026
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ospn.jp
Desktop screenshot of ospn.jp
Mobile screenshot of ospn.jp
Mobile

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Hosting Provider

Vectant

IP Address

124.35.85.85

Site Location

🇯🇵 Japanvia tld

Server Location

🇯🇵 Ikejiri, Japan

ASN

AS17506

Organization

Vectant

Server

Nginx

Nameservers

ns-808.awsdns-37.net.ns-1473.awsdns-56.org.ns-1583.awsdns-05.co.uk.ns-232.awsdns-29.com.

Performance

97

Core Web Vitals

Weight

First Contentful Paint
989 ms10%
Speed Index
1.3 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
347 KB
18 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Bootstrap
Infrastructure
Hosting
Vectant

Technology Stack

6 Technologies Detected

CSS Frameworks

2
Bootstrap
Tailwind CSS

Icon Libraries

1
Font Awesome

Fonts

1
Google Fonts

Analytics

1
Facebook Pixel

Web Servers

1
Nginx

SEO Analysis

D51/100
15
5
1
Meta Tags4/15
Content6/12
Headings8/8
Technical13/21
E-E-A-T0/7
Images0/7
Links5/5
URL5/5
Social3/5
Freshness0/4
Mobile4/4
Indexability3/3
O
ospn.jpospn.jp

オープンソースカンファレンス

No description available for this page.

Title Length14 chars

Recommended: 50-60 chars (~86px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

  • • Missing meta description — important for click-through rates in SERPs

6 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

F36/100
Bot Access
20/25
Machine Read.
7/25
Schema Data
0/25
Citation
9/25

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
nav
Text ratio:9%
Words:79
Token eff.:Too Short
Sections/1K:30
Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary
Descriptive Headingsavg 1w
Canonical URL
Open Graph2/3
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.
A
85/100
13
Passed
1
Critical
0
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
20/20
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
6/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
1 recommendation
  • •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.
50/100
A
43 mg
CO₂e / view
346.5 KB
Page Weight
90%
Cleaner Than
New Visitor
49 mg
vs
Returning (cached)
25 mg
Annual (10K/mo)
5.1 kg
Emission Segments
Data Center
10 mg
Network
10 mg
Device
23 mg
Resource Breakdown
JavaScript
41.0 KB
CSS
241.1 KB
Fonts
60.4 KB
HTML
4.0 KB
Green Hosting Not Verified
Vectant
5 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
B

Security Score

76%Good
Static / Informational

HTTPS

No WAF

66d

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

Valid From

21.04.2026

Valid Until

20.07.2026

Subject Alternative Names (5)

event.ospn.jpospn.jpregister.ospn.jpwiki.ospn.jpwww.ospn.jp

SHA-256 Fingerprint

52:A0:C0:77:3D:CE:0C:2F:7D:99:0C:81:AB:7A:C9:98:E9:92:04:E9...

Recommendations

Security recommendation preview

Upgrade to view recommendations
Upgrade to view header details

HTTP Headers

Developer Console

content-encoding
📦 Gzip(gzip)
content-length
3816
content-type
text/html; charset=UTF-8
date
Thu, 14 May 2026 17:56:13 GMT
server
nginx
strict-transport-security
max-age=15768000; includeSubdomains
Good Warning Issue

Email Infrastructure

Google Workspace

Score

73

SPF
DKIM
DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

smtp.google.com

Domain Information

ospn.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.
C
67/100
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
1 recommendation
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

-apple-system

WCAG Partial
71/100
Readability
/30
26/30

18px · LH 1.50

Hierarchy
/20
11/20

1.64x ratio · ✓ H1→H6

WCAG
/25
14/25

3.98:1 min contrast

Performance
/25
20/25

System fonts

Heading Font

-apple-system

Sans29px

Body Font

-apple-system

Sans18px

Contrast Ratio

3.98:1

9 issues

Reading Comfort

~36 CPL

Narrow lines
29px
h1
26px
h2
18px
p

✅ Excellent readability: 18px body text is ideal for all devices.

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

⚠️ Partial contrast: 9 elements below WCAG AA threshold (min 4.0:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

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

✅ System fonts: Zero font loading delay — best possible LCP impact.

GGoogle Fonts

Color Palette

8 unique colors
Light
#ffffff
Primary· 54.10000000000001%
#c0fdfe
Accent· 8.8%
#e2f1fe
Accent· 8.2%
#93f0fe
Accent· 8%
#202228
Text· 7.1%
#ace5fc
Accent· 6.1%
#3d464c
Secondary· 4.6%
#aec9dc
Secondary· 3.1%

Business & Marketing Stack

4 Tools Detected

Advanced

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

Advertising

1
Facebook PixelMid-Market

Ad platforms and retargeting pixels

Social Media

2
Facebook SDKFree
Twitter/X WidgetsFree

Social widgets and sharing tools

3

Categories

4

Total Tools

0

Enterprise

1

Mid-Market

Assessment: Well-developed marketing technology stack

Sponsored

Scripts & Styles

12 Resources

9
Scripts
3
Styles
3
Async
0
Defer

Top Script Sources

local(3)connect.facebook.net(2)platform.twitter.com(2)kit.fontawesome.com(1)b.st-hatena.com(1)

Website Identity

ospn.jp

Location detected: 🇯🇵 Japanvia tld
📧 Google Workspaceja

Social Profiles

FacebookX (Twitter)

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Last analyzed: 14 May 2026 at 17:56

Historical Analysis & Change Tracking