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nikkei-science.com

https://nikkei-science.com· First analyzed 21 May 2026· Updated 21 May 2026
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nikkei-science.com
Desktop screenshot of nikkei-science.com
Mobile screenshot of nikkei-science.com
Mobile

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Hosting Provider

Cloudflare
cloudflare.com

IP Address

104.18.24.230

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

alexandra.ns.cloudflare.com.arvind.ns.cloudflare.com.

Performance

78

Core Web Vitals

Weight

First Contentful Paint
2.5 s10%
Speed Index
3.3 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
783 KB
126 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
WordPress
cms
Nikkei Sciencev1.0Custom
by ディーキューブ & Sure
View Theme

Technology Stack

18 Technologies Detected

Advertising

4
Google AdsGoogle AdSenseCriteoOutbrain

Plugins

4
Wordpress Popular Posts
Wp Pagenavi
Wp Jquery Lightbox
Wp Table Reloaded

Analytics

3
Google Analytics
Google Analytics 4
Facebook Pixel

Libraries

1
jQueryv3.5.1

UI Components

1
Lightbox

CSS Frameworks

1
Tailwind CSS

Icon Libraries

1
Material Icons

Fonts

1
Google Fonts

Payments

1
Square

CDN

1
Cloudflare

SEO Analysis

D56/100
14
11
1
Meta Tags8/15
Content10/12
Headings6/8
Technical9/21
E-E-A-T0/7
Images4/7
Links5/5
URL5/5
Social3/5
Freshness0/4
Mobile3/4
Indexability3/3
N
nikkei-science.comnikkei-science.com

日経サイエンス | 一般読者向けの月刊科学雑誌「日経サイエンス」のサイトです。

一般読者向けの月刊科学雑誌「日経サイエンス」のサイトです。

Title Length39 chars

Recommended: 50-60 chars (~239px / 580px)

Description Length29 chars

Recommended: 120-160 chars

Issues (1)

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

12 issues found

Upgrade to view details

Crawlability

Sitemap
robots.txt

64 rules

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

F35/100
Bot Access
20/25
Machine Read.
4/25
Schema Data
0/25
Citation
11/25

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:11%
Words:8,184
Token eff.:Excessive
Sections/1K:1

Structured Data

No Schema

Citation Readiness

Opening Summary18w
Descriptive Headingsavg 3.6w
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...
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.
B
70/100
11
Passed
3
Critical
1
Warnings
Images & Alt Text
10/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
14/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
10/15
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
6/15
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.
59/100
B
79 mg
CO₂e / view
783.0 KB
Page Weight
80%
Cleaner Than
New Visitor
90 mg
vs
Returning (cached)
45 mg
Annual (10K/mo)
9.5 kg
Emission Segments
Data Center
4 mg
Network
23 mg
Device
52 mg
Resource Breakdown
JavaScript
437.3 KB
Images
290.6 KB
CSS
44.0 KB
HTML
11.2 KB
Green Hosting Verified
Cloudflare
GWF Verified
3 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
C

Security Score

65%Fair
Critical / Transactional

HTTPS

WAF

79d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

11.05.2026

Valid Until

09.08.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

nikkei-science.com*.nikkei-science.com

SHA-256 Fingerprint

0D:38:4E:D9:EA:1E:72:92:51:8F:AA:8C:33:19:D2:FF:CD:AC:6B:82...

Upgrade to view header details

HTTP Headers

Developer Console

cache-control
🔵 1 Week(max-age=604800, public)
cf-cache-status
DYNAMIC
cf-ray🇮🇹 Milan
9ff12207efe283ac-MXP
content-encoding
📦 Gzip(gzip)
content-security-policy
default-src * 'unsafe-eval' 'unsafe-inline' gap://ready file...
content-type
text/html; charset=UTF-8
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

0

SPF
DKIM
DMARC

Domain Information

nikkei-science.com

Domain Age
24y 5m

Created

06.12.2001

Expires

06.12.2026

Last Updated

06.12.2025

Registrar

PSI-Japan, Inc.

DNSSEC
Not Enabled

Privacy & Compliance

Quantcast Choice

Cookie Consent Banner
Quantcast Choice
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
CMP: Quantcast Choice
Privacy policy page linked
Legitimate interest basis mentioned

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.
D
55/100
Not Mobile Friendly11 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.
3 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Open Sans

WCAG Partial
60/100
Readability
/30
14/30

12px · LH 1.33

Hierarchy
/20
15/20

1.5x ratio

WCAG
/25
15/25

2.48:1 min contrast

Performance
/25
16/25

2 fonts · 32 req

Heading Font

Open Sans

Sans18px

Body Font

Open Sans

Sans12px

Contrast Ratio

2.48:1

28 issues

Reading Comfort

~71 CPL

Optimal (45–75)
18px
h1
12px
h2
12px
h3
12px
p

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

⚠️ Tight line spacing (1.33). Increase to 1.4–1.6 for better readability.

✅ Optimal line length: ~71 chars/line (ideal 45–75 CPL).

⚠️ Partial contrast: 28 elements below WCAG AA threshold (min 2.5:1).

⚠️ Minor heading issue: 0 level skip(s) detected. Maintain sequential order for screen readers.

✅ Modern fluid typography: clamp() with rem units ensures zoom accessibility (WCAG 1.4.4).

GGoogle FontsFluid Type (rem)

Color Palette

8 unique colors
5.74:1 AA Dark
#666666
Other· 30.799999999999997%
#ffffff
Background· 21.7%
#3fb135
Primary· 0%
#184714
Accent· 25.4%
#22251b
Secondary· 7.4%
#3e5143
Text· 7.2%
#488069
Secondary· 1.7%

Business & Marketing Stack

5 Tools Detected

Enterprise

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

Advertising

2
Google AdsEnterprise
Facebook PixelMid-Market

Ad platforms and retargeting pixels

Social Media

2
Facebook SDKFree
Twitter/X WidgetsFree

Social widgets and sharing tools

3

Categories

5

Total Tools

1

Enterprise

1

Mid-Market

Assessment: Sophisticated marketing and sales technology infrastructure

Ad Networks

Google AdSenseMedia.netSovrnPubMaticOpenXIndex Exchange

Sponsored

Scripts & Styles

27 Resources

19
Scripts
8
Styles
7
Async
2
Defer

Top Script Sources

nikkei-science.com(6)pagead2.googlesyndication.com(3)connect.facebook.net(3)fundingchoicesmessages.google.com(2)local(2)

Website Identity

nikkei-science.com

24 years old
Location detected: 🇨🇦 Canadavia ip
PSI-Japan, Inc.ja

Sponsored

Last analyzed: 21 May 2026 at 05:21

Historical Analysis & Change Tracking