Japan PI

Private Investigators in Tokyo, Osaka and Honolulu

Serving Businesses, Law Firms and Individuals

About Us

Japan PI Inc. is a multilingual 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 specialize in online-based PI services with multilingual, real-time reporting and more competitive prices from the benefit of direct communication with field agents or researchers.

Who We Serve

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Starting or growing a 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 Due Diligence services for foreign businesses such as Company Investigation, Credit Reports and pre-Employment Screening.


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

We assist foreign Law Firms and Attorneys with legal support services such as Service of Process (Legal Docs), obtain Public Records, Witness services, and Asset Searches.  We respect and abide by all Japanese Laws, 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 insurance claims and disability fraud investigations, skip tracing services, or even surveillance.


We serve high net worth individuals with their Private Investigation needs. We help you find lost family members in Japan, missing people, perform background checks, handle child custody cases, or infidelity. Our surveillance practices are the best in Japan.

Why Japan PI?

Real time update

Online PI

We commit to the transparent pricing, quick updates with online-based services, including online contracts and reporting so that we can offer more user-friendly due diligence services and affordable PI services that best match the customer’s demands.

Advanced intelligence

Advanced Intelligence

We are the only full-service PI Agency in Japan that provides multilingual inbound investigation services. We are the leader in the industry regarding the best possible investigative technique based on the global standard.


Cultural Bridge

We are not only a PI agency but also serve as a “bridge” of local culture and business customs including translation and consulting services. We specialize in various issues such as international trade activities, employment, divorce, and inheritance, etc. 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 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.

Business Customs in Japan
Surveillance in Japan

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 also use a wide variety of databases, as well as our 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 using undercover operation. Therefore, we are ready to execute any covert approach with a 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

Contact Japan PI

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