TLD Notes

Field Guide to Domains

Field Guide to Domains — A TLD Explorer

This site is an observational record and does not endorse any specific domain.

.co.jp

Classical Era (–2010)

Restricted to Japanese corporations. One domain per organization. The strongest trust signal in Japan.

Observer's Note

Armored like a fortress. Only those bearing the credential of corporate personhood may don this shell.

Vibe Tags

Corp Only Highest Trust Japan

Observed Specimens

Domain choices shown here reflect each organization's own decisions and are not endorsements by this site.

toyota.co.jp Toyota
Manufacturing / Hardware

Japan's largest automaker with global operations.

A symbol of Japanese corporate identity. While toyota.com exists, the official Japanese site uses .co.jp.

sony.co.jp Sony
Manufacturing / Hardware

Electronics and entertainment conglomerate.

A global brand, yet the Japanese corporate site uses .co.jp — a statement of trust and prestige.

nintendo.co.jp Nintendo
Gaming / Entertainment

Global gaming company. Switch, Mario, and more.

The pride of a Kyoto heritage company expressed through .co.jp.

freee.co.jp freee
Finance / FinTech

Cloud accounting software for SMBs and sole proprietors.

A SaaS company that chose .co.jp for its B2B nature. A trust signal for corporate clients.

panasonic.co.jp Panasonic
Manufacturing / Hardware

Diversified electronics manufacturer, from home appliances to industrial equipment.

A pillar of Japanese manufacturing. .co.jp asserts legitimacy as a Japanese corporation.

rakuten.co.jp Rakuten Group
E-Commerce / Retail

One of Japan's largest e-commerce malls, expanding into finance and telecom.

The gateway to the Rakuten ecosystem. A .co.jp domain symbolizing Japanese e-commerce culture.

honda.co.jp Honda
Manufacturing / Hardware

Automobile and motorcycle manufacturer, also entering robotics.

Like Toyota, the Japanese corporate site uses .co.jp. The split with honda.com is noteworthy.

cyberagent.co.jp CyberAgent
Media / Publishing

Operator of AbemaTV. Integrated IT company spanning advertising, media, and gaming.

An internet company that chose .co.jp — reflecting its stature as a TSE Prime-listed corporation.

dena.co.jp DeNA
Gaming / Entertainment

Mobile gaming, sports, and healthcare. Operates Yokohama DeNA BayStars.

A mobile-native company using .co.jp to project corporate legitimacy. Trust signal for a diversified conglomerate.

smarthr.co.jp SmartHR
SaaS / Web Services

Cloud-based HR and labor management software.

Chose .co.jp for the trust-sensitive HR domain. Designed to reassure corporate clients.

cybozu.co.jp Cybozu
SaaS / Web Services

Developer of groupware including kintone and Garoon.

A SaaS company powering Japan's work-style reform. .co.jp conveys "a Japanese company for Japanese companies."

plaid.co.jp PLAID
SaaS / Web Services

Developer of KARTE. Customer experience (CX) platform.

Uses .co.jp to differentiate from the US company plaid.com. Asserts legitimacy as a Japanese corporation.

yappli.co.jp Yappli
SaaS / Web Services

No-code app development platform.

.co.jp builds trust for an enterprise-facing no-code SaaS. Appeals to corporate clients.

visasq.co.jp VisasQ
SaaS / Web Services

Spot consulting matching platform.

A B2B knowledge-sharing platform. .co.jp ensures trust in business-to-business transactions.

medley.co.jp Medley
Healthcare / Medical

Healthcare IT company. Operates online medical consultation service "CLINICS."

.co.jp is an essential choice for healthcare IT. Trust from both patients and medical institutions is vital.

because-you.co.jp M3
Healthcare / Medical

Platform for healthcare professionals. Parent operator of m3.com.

Corporate domain is .co.jp, service domain is m3.com. Domain split by purpose.

recruit.co.jp Recruit Holdings
SaaS / Web Services

Major information services company covering HR, housing, dining, and travel.

One of Japan's largest information service companies. .co.jp supports corporate credibility across diverse business units.

ntt.co.jp NTT (Nippon Telegraph and Telephone)
Dev Tools / OSS

Japan's largest telecom group. Parent of NTT Docomo and others.

The backbone of Japan's telecom infrastructure. The gravitas of a 3-letter .co.jp. Former state-owned trust embedded in the domain.

kddi.co.jp KDDI
Dev Tools / OSS

Telecom carrier known for the au brand.

Consumer-facing is au.com, but the corporate site uses .co.jp. Separating consumer brand from corporate identity.

mitsui.co.jp Mitsui & Co.
Finance / FinTech

One of the "Big Five" trading companies. From resources and energy to DX.

A zaibatsu trading house dating back to the Edo period. .co.jp expresses centuries of history and prestige in the Japanese economy.

sumitomo.co.jp Sumitomo Corporation
Finance / FinTech

Big Five trading company. Metals, transportation, construction, and more.

Heir to the Sumitomo zaibatsu. .co.jp is the "formal attire" of Japanese corporations. Roots stay in Japan despite global expansion.

dentsu.co.jp Dentsu
Media / Publishing

Japan's largest advertising agency. Dominant share of the domestic ad market.

Group holding uses dentsu.com, but domestic operations keep .co.jp. A textbook example of domain identity splitting.

nomura.co.jp Nomura Securities
Finance / FinTech

Japan's largest securities firm. Asset management and investment banking.

.co.jp for financial institutions is a mark of trust for custodial assets. For securities firms, .co.jp matters more than .com.

dai-ichi-life.co.jp Dai-ichi Life Insurance
Finance / FinTech

One of the "Big Four" life insurance companies in Japan.

Even with hyphens, .co.jp credibility prevails. The domain contributes to the trust foundation of long-term insurance contracts.

keyence.co.jp Keyence
Manufacturing / Hardware

Sensor and measurement equipment maker. Known for exceptional profitability.

One of the highest market-cap manufacturers. For B2B manufacturers, .co.jp is a trust signal to business partners.

murata.co.jp Murata Manufacturing
Manufacturing / Hardware

Electronic components maker. World leader in ceramic capacitors.

A global leader in B2B electronics based on .co.jp. "Visible trust" for a company that makes invisible components.

View all specimens for this TLD →

Observed Habitats

Finance / FinTech Healthcare / Medical E-Commerce / Retail Media / Publishing

Prevalence

62

⚠ Caution

Requires legal corporate status. Strictly one domain per entity.

Snapshot: 2026-03