Japan PI

Private Investigators in Tokyo – Osaka – Honolulu

Japan’s Premiere Bilingual PI Agency

About Us

Japan PI Inc. is a bilingual full service Private Investigator 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 25 years of experience as a Private Detective. We are the only PI Agency where you can communicate with field agents directly both in English and Japanese.

Who We Serve

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Are you trying to find a loved one in Japan? Or wondering what your spouse is up to? We have helped hundreds of individuals across the world to locate or track people in Japan. We have found lost relatives, located missing children, tracked cheating wives and husbands and more.


Starting or growing a foreign company in Japan can be a daunting task. You need to hire the right people, and make the right decisions. Who can you trust? At Japan PI, we offer a range of services for businesses such as Company Investigation, Credit Reports, pre-Employee Screening, and Intellectual Property Reports.


Are you doing investment in Japan, but not sure if that person across the table is as legitimate as they claim to be?  We offer a range of services for corporate investors such as Individual and Company Investigation, Background Checks, Credit and Intellectual Property Reports and more.

Law Firms

Are you a Law Firm, and need some help in Japan? We assist foreign Law Firms and Attorneys with services such as Service of Summons (Service Process), Civil Process, and Asset Searches.  We respect and abide by all Japanese Laws, especially relating to privacy. Yet we deliver results.

Insurance Companies

Insurance companies deal with fraudulent claims all the time. But what if their claimant lives in Japan? At Japan PI, our bilingual agents provide claims investigation, disability fraud, skip tracing services and more.

Why Japan PI?

Real time update

Real Time Updates

While doing surveillance, we use the latest communication technologies to keep you updated realtime on the whereabouts of your subject. You can stay informed at all times.

Advanced intelligence

Advanced intelligence

At Japan PI, we pride ourselves on our in depth investigations. We leverage our unique proprietary database and professional PI skills to get you the best intelligence in Japan.


Cultural Bridge

We are not only a PI agency, but also serve as a “bridge” of local culture and business customs. We can explain to you in clear words what is possible, and not possible in Japan.

Reliable Private Detective Services in Japan

Since 2002, Japan PI is the leading bilingual Private Investigation firm in Japan. We take pride in delivering results oriented services, while keeping our clients updated in real-time. Our investigative solutions can facilitate just about any kind of intelligence solution you can imagine. Clients throughout the world benefit from our state-of-the-art intelligence, 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.

Business Customs in Japan
Surveillance in Japan

20+ years of Experience and Expertise

Our firm has been providing highest quality investigative services since it’s establishment in 2002. Mr. Goro Koyama, CEO of Japan PI, has been a Private Detective since 1993. We are specialized in Human Intel (HUMINT) operations business intelligence gathering, but also personal services. We have also use a wide variety databases, as well as our own proprietary DB to track available corporate and personal data. As CEO himself has been a full active field operator, our specialty is surveillance work and discreet intelligence gathering by means of undercover operation. Therefore, we are ready to execute any discreet approach with variety of disguised identities.

Our Services

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

Asset Search

Locate hidden assets based on court orders, bank accounts, real estate properties, etc.

Company Investigation

Company related information Investigation, Background Checks, Due Diligence.

Intellectual Property

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

People Search

Find missing family members, lost contacts, Runaways, or fugitives.

Find Lost Family

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

Background Checks

Perform individual background checks, employment, money trouble, fraud.

Pre-employment Screening

Verify applicant education, employment history and references.

"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, USA

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