What technology does sei.co.jp use?

sei.co.jp is built with Drupal, jQuery, Apache.

Is sei.co.jp secure (HTTPS)?

Yes. sei.co.jp uses TLS 1.3 with a certificate issued by DigiCert Inc, valid until Dec 3, 2026.

Hosting provider information for sei.co.jp is not available yet.

What is sei.co.jp's SEO score?

sei.co.jp scored 75/100 for SEO in the latest analysis (fair).

What is sei.co.jp's overall website score?

sei.co.jp has an overall SiteGraph score of 88/100, combining SEO, performance, security, and accessibility.

sei.co.jp

住友電工 | Connect with Innovation

Last scanned Jul 26, 2026, 4:17 PM · 1 view

Overall score

Great

Summary

独創的な研究開発を通じ、環境エネルギー、情報通信、自動車、エレクトロニクス、産業素材の5つの分野で、幅広く事業を展開し、社会インフラの発展に貢献する… This website uses Apache. SEO is good (75/100) and accessibility is excellent (100/100). Security scores excellent (100/100) and performance good (80/100). Top issue: Meta description longer than 160 characters.

独創的な研究開発を通じ、環境エネルギー、情報通信、自動車、エレクトロニクス、産業素材の5つの分野で、幅広く事業を展開し、社会インフラの発展に貢献するグローバルカンパニー。

Top issues to fix

7 issues found · 1 high priority

Slow estimated load (8.0s)
Performance
Use a CDN, enable caching/compression, and cut render-blocking assets — every extra second costs conversions.
2 cookies without Secure/HttpOnly flags
Security
Set Secure and HttpOnly on session cookies so they can't leak over HTTP or be read by injected scripts.
Meta description longer than 160 characters
SEO
Trim the meta description to under 160 characters to avoid truncation in search results.
No structured data (JSON-LD) found
SEO
Add JSON-LD (Organization, Article, Product…) to become eligible for rich results.
robots.txt not found
SEO
Publish /robots.txt with a Sitemap: directive to guide crawlers.
sitemap.xml not found
SEO
Publish an XML sitemap and reference it from robots.txt to speed up page discovery.

+1 more issue — details in the sections below.

SEO

4 issue(s) found

Performance

8.01 s

100

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Organization

Company details published in this site's own structured data.

LinkedIn YouTube Instagram

Meta tags

Title: 住友電工 | Connect with Innovation
Description: 独創的な研究開発を通じ、環境エネルギー、情報通信、自動車、エレクトロニクス、産業素材の5つの分野で、幅広く事業を展開し、社会インフラの発展に貢献するグローバルカンパニー。
Canonical: https://jp.kohoadm.is.sei.co.jp/jp/
Language: ja
Charset: utf-8
Viewport: width=device-width, initial-scale=1.0, user-scalable=no
Robots meta
Manifest

Technologies

Detected frameworks, languages, and tools.

Drupal jQuery Apache

Hosting & CDN

Hosting provider: —
CDN provider: —
IP address: —
ASN: —

DNS records

Type	Value
A	—
AAAA	—
MX	—
TXT	—
NS	—
CAA	—
CNAME	—
IPv6 support	No

TLS / SSL certificate

Version: TLS 1.3
Issuer: DigiCert Inc
Subject: sumitomoelectric.com
Valid from: Nov 3, 2025
Valid to: Dec 3, 2026
Days until expiry: 127
SAN domains: sumitomoelectric.com, www.sumitomoelectric.com

Security headers

Strict-Transport-SecurityEnabled
Content-Security-PolicyEnabled
X-Frame-OptionsEnabled
X-Content-Type-OptionsEnabled
Referrer-PolicyMissing
Permissions-PolicyMissing

Compression: gzip · 2 cookie(s) observed

Content & assets

Headings

H1 1 · H2 18 · H3 0

Links

137 internal · 15 external · 20 broken

Images

36 total · 0 missing alt

Scripts / Styles

11 scripts · 2 stylesheets

JS / CSS size

21.6 KB · 234 B

Page size

208 KB

Robots.txt & Sitemap

robots.txt: Not found
Disallow rules: 0
sitemap.xml: Not found
URLs in sitemap: 0

SEO issues

Meta description longer than 160 characters
No structured data (JSON-LD) found
robots.txt not found
sitemap.xml not found

Scan details

Requested URL: https://sei.co.jp
Final URL: https://sumitomoelectric.com/jp/
HTTP status: 200
HTTP version: HTTP/2
Response time: 8.00 s
HTML size: 208 KB
Redirect chain: https://sei.co.jp → https://sumitomoelectric.com/jp/

See something wrong on this report? Request a correction

Same technology stack

climatepartner.com

ClimatePartner ist Ihr Partner im Klimaschutz

apachedrupalgoogle-analytics

· CloudFront

uspto.gov

United States Patent and Trademark Office

apachedrupaljquery

· CloudFront

blauer-engel.de

Blauer Engel | Das deutsche Umweltzeichen

apachedrupaljquery

IPB - IPB Internet Provider in Berlin GmbH, DE

healthfinder.gov

MyHealthfinder | odphp.health.gov

apachedrupaljquery

AWS· CloudFront

gleneagleshospitals.co.in

Gleneagles Hospitals is a part of the IHH Healthcare Network

apachedrupaljquery

healthypeople.gov

Healthy People 2030 | odphp.health.gov

apachedrupalgoogle-analytics

AWS· CloudFront

Frequently asked questions

What technology does sei.co.jp use?: sei.co.jp is built with Drupal, jQuery, Apache.
Is sei.co.jp secure (HTTPS)?: Yes. sei.co.jp uses TLS 1.3 with a certificate issued by DigiCert Inc, valid until Dec 3, 2026.
Who hosts sei.co.jp?: Hosting provider information for sei.co.jp is not available yet.
What is sei.co.jp's SEO score?: sei.co.jp scored 75/100 for SEO in the latest analysis (fair).
What is sei.co.jp's overall website score?: sei.co.jp has an overall SiteGraph score of 88/100, combining SEO, performance, security, and accessibility.

Top issues to fix

Organization

Meta tags

OpenGraph & Twitter Card

Technologies

Hosting & CDN

DNS records

TLS / SSL certificate

Security headers

Content & assets

Robots.txt & Sitemap

SEO issues

Accessibility issues

Scan details

Related websites

Frequently asked questions