openers.jp

https://openers.jp· First analyzed 19 May 2026· Updated 19 May 2026

Export

openers.jp

Mobile

Sponsored

Hosting Provider

Suzuyo Shinwart Corporation

IP Address

133.88.3.105

Site Location

🇯🇵 Japanvia tld

Server Location

🇯🇵 Chiyoda City, Japan

ASN

AS18068

Organization

Suzuyo Shinwart Corporation

Server

Nginx

Nameservers

ns-cloud-d2.googledomains.com.ns-cloud-d3.googledomains.com.ns-cloud-d1.googledomains.com.ns-cloud-d4.googledomains.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

6.6 s10%

Speed Index

8.6 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

615 KB

65 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Suzuyo Shinwart Corporation

Technology Stack

10 Technologies Detected

Analytics

Libraries

UI Components

Icon Libraries

Fonts

Tag Managers

Advertising

Web Servers

SEO Analysis

C65/100

Meta Tags7/15

Content11/12

Headings8/8

Technical17/25

E-E-A-T0/7

Images3/7

Links5/5

URL5/5

Social5/5

Freshness0/4

Mobile1/4

Indexability3/3

openers.jpopeners.jp

Web Magazine OPENERS

Web Magazine OPENERSは、「品性と知性の開拓者」をテーマに、こと・モノの背景に隠された選ぶ理由、選ばれる理由の物語を、編集者の視点を通して発信するライフスタイルマガジンです。

Title Length20 chars

Recommended: 50-60 chars (~130px / 580px)

Description Length96 chars

Recommended: 120-160 chars

Issues (1)

• Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

9 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

654 URLs

654 sub-sitemaps

robots.txt

3 rules

Local SEO

Local Search Readiness

6/100

Poor

2 13 2

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

Sponsored

AI & LLM Readiness

D47/100

Bot Access

20/25

Machine Read.

11/25

Schema Data

3/25

Citation

13/25

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:5%

Words:1,876

Token eff.:Optimal

Sections/1K:6.9

Depth:1/5

Structured Data

1 JSON-LD

WebSiteSearchAction

Citation Readiness

Opening Summary

Descriptive Headingsavg 12.5w

Canonical URL

Open Graph3/3

Twitter Card3/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (9)

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.

61/100

Passed

Critical

Warnings

Images & Alt Text

15/20

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

Semantic Structure

17/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

5/15

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

0/15

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.

42/100

76 mg

CO₂e / view

614.9 KB

Page Weight

80%

Cleaner Than

New Visitor

87 mg

Returning (cached)

44 mg

Annual (10K/mo)

9.1 kg

Emission Segments

Data Center

17 mg

Network

18 mg

Device

41 mg

Resource Breakdown

JavaScript

364.5 KB

Images

3.6 KB

Fonts

148.8 KB

HTML

98.0 KB

Green Hosting Not Verified

Suzuyo Shinwart Corporation

7 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

74d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

03.05.2026

Valid Until

01.08.2026

Subject Alternative Names (1)

openers.jp

SHA-256 Fingerprint

09:7D:AF:4C:24:F5:B4:D5:9A:EB:02:7C:CC:39:97:8C:3A:9C:6F:8E...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

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

content-type

text/html;charset=UTF-8

date

Tue, 19 May 2026 08:08:53 GMT

expires

Thu, 01 Jan 1970 09:00:00 +0900

pragma

no-cache

server

nginx

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

mail.openers.jp

Domain Information

openers.jp

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

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.

39/100

Not 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.

3 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Avenir

WCAG AAA

65/100

Readability

/30

19/30

14px · LH 1.65

Hierarchy

/20

14/20

1.79x ratio · ✓ H1→H6

WCAG

/25

23/25

16.49:1 min contrast

Performance

/25

9/25

3 fonts · 1 req

Heading Font

Avenir

Sans25px

Body Font

Avenir

Sans14px

Contrast Ratio

16.49:1

WCAG AAA (≥7:1)

Reading Comfort

Single Font Family

left aligned

25px

50px

18px

Minor Third

Scale

⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

⚠️ Hard to read: Flesch score 35/100. Simplify sentences for wider reach.

✅ WCAG AAA contrast: All text meets 7:1 ratio (min 16.5:1).

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

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

GGoogle Fonts Buy on MyFontsFlesch 35

Color Palette

9 unique colors

15.19:1 AAA Light

#ffffff

Background· 45.3%

#242628

Text· 7.9%

#384449

Secondary· 5.5%

Business & Marketing Stack

5 Tools Detected

Enterprise

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

Ad platforms and retargeting pixels

Social Media

Facebook SDKFree

Pinterest WidgetsFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

27 Resources

Scripts

Styles

Async

Defer

Top Script Sources

nrzrbfnxu4s7ucc9gsgt7ehg.global.ssl.fastly.net(7)connect.facebook.net(3)googletagmanager.com(3)securepubads.g.doubleclick.net(2)assets.pinterest.com(1)

Website Identity

openers.jp

Location detected: 🇯🇵 Japanvia tld

Social Profiles

Facebook X (Twitter)Instagram

Sponsored

Last analyzed: 19 May 2026 at 08:09

Historical Analysis & Change Tracking