Japan PI

Bilingual Private Investigators in Tokyo, Osaka and Japan

Serving Businesses, Attorneys and Individuals

About Japan PI

Japan PI Inc. is a bilingual Private Investigations Agency located in Japan, with offices in Tokyo, Osaka, and Honolulu. We’ve been in business since 2002, and our lead agent, Goro Koyama, has 30 + years of experience as a Private Detective. Our concept is the fusion of private investigation and translation. We are the only field private investigators in Japan that specialize in international cases.

Who We Serve

At Japan PI, we offer a range of Due Diligence services for foreign businesses such as Company Investigations, Employee Surveillance, and pre-Employment Screening.

We offer a range of services for corporate investors such as Individual and Company Background Checks, Business Credit Reports, Intellectual Property Reports and more.

We assist foreign Law Firms and Attorneys with legal support services such as Service of Process (Legal Docs), obtain Government Records, Witness services, and Asset Searches.

Insurance companies deal with fraudulent claims all the time. But what if their claimant lives in Japan? At Japan PI, our bilingual agents investigate insurance claims and insurance fraud of all types.

We serve high net worth individuals with their Private Investigation needs including finding lost family or missing people, background checks, child custody investigation, or infidelity in Japan.

Why Japan PI?

We serve you with honesty and get things done with the best efficiency.


Integrity is at the heart of what we do. We will be totally honest and up front about the services we can or cannot provide.

Legal Assistance


Our services use the latest technologies and research methods. You will receive updates in real time as events occur.

Bilingual PI


Worried about misunderstandings? As one of few bilingual PIs in Japan, we can bridge the gap in JA culture and communications.

Reliable Private Detective Services in Japan

Since 2002, Japan PI is the leading bilingual Private Investigation firm in Japan. We take pride in delivering result-oriented services while keeping our clients updated in real-time.

Our investigative solutions can facilitate just about any intelligence solution you can imagine. Clients throughout the world benefit from our well-tailored information and unique insight.

These factors are crucial for protecting companies, assets, and people. We cater to the demands of private individuals, investors, businesses, law firms and insurance companies.

Since 2002, Japan PI is the leading bilingual Private Investigation firm in Japan. We take pride in delivering result-oriented services while keeping our clients updated in real-time.
20+ years of Experience and Expertise

20+ years of Experience and Expertise

Our firm has been providing highest quality investigative services since its establishment in 2002.

Mr. Goro Koyama, CEO of Japan PI, has been a Private Detective since 1993. We are the leading PI agency in Japan for surveillance, interviews, and desktop intelligence gathering.

We have an extensive range of database access, as well as our proprietary database to track available corporate and personal data.

Our Services

Track missing people, cheating spouses, dishonest employees or insurance fraud.

Company related information Investigation, Background Checks, Due Diligence.

Obtain counterfeited brand goods, forged items, parts, and trade mark infringements.

Find missing child/spouse, lost contacts, runaways, or fugitives.

Locate long lost family, heirs, or loved ones in Japan.

Personal background checks on marriage, money trouble, fraud, etc.

Our Locations

Latest Articles

Missing Persons

Statistics of Missing People in Japan

Statistics released by NPA Japan in 2022 detail the number of missing persons, including data on the type of people who went missing and the reasons behind their disappearance. The

"I cannot tell you how pleased I am for your work... Perhaps we shall meet some day, but if not, I hope you know you have made a fundamental difference in my life and with several other people. In my culture, we have a word, mensch, which means a really good person, one whom you can trust and respect. You, sir, are a mensch. It is an honor to have worked with you."
Mark D

Contact Japan PI

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