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Japan PI is a private investigation firm based in Japan.
- Name
- Japan PI Inc. / 株式会社Japan PI
- Company Number
- 0111-01-042541 (Incorporated in Japan)
- Address
- Tokyo
2-6-20-#504 Kitashinjuku Shinjuku Tokyo 1690074 Japan
Osaka
4-20-9-#204 Minamihorie, Nishi-ku, Osaka Osaka, 5500015, Japan
Honolulu
1888 Kalakaua Ave C312 HONOLULU HI 96815 USA - Established
- October 28, 2002
- Capital
- JPY 10 million
- CEO
Goro KOYAMA 小山 悟郎
- Contact Us
- https://www.japanpi.com/contact-us/
- FAX
- 03-4496-4663 (+81-3-4496-4663)
- PI Registration
- Tokyo 30160155
Osaka 62161286
Osaka Governor Registration - Legal Adviser
- Masako BANNO, Attorney at Law: Okuno & Partners
- Memberships
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The Specified Commercial Transactions Act
Interested in working for Japan PI as a Private Investigator, please go to our Jobs Page.
About Goro KOYAMA

When I was in university, I seriously practiced full contact martial arts powerhouse in the college league. But as I was not an elite athlete, I broke my elbow and both knees.
While attending university, I had a strong interest in field works of researching on the hidden side of life or society and international matters including migration. In that course, I experienced a variety of fishy or illegitimate part time works. And the lure of doing fieldwork was too exciting for me. So I dropped out of college to pursue my passion in life, to become a Private Investigator where your main goal is uncover the hidden side or life or society.
I took a job at a local PI firm in Tokyo in 1992 and apprenticed as an investigator for 10 years, then founded my own agency in 2002.
I have never lost my curiosity in foreign matters and hidden facts of life since my childhood, so I am addicted to learn English by preventing myself from watching or reading Japanese other than work and look up online articles about untold stories or tools to uncover hidden facts.
What I do for a living now will be fitting with all my traits from my youth.

News and Press

Goro Koyama, Bilingual PI: On-the-job learning works for undaunted, fearless PI
Japan Times Alpha Oct 30, 2020 (PDF)

Goro Koyama, PI: A private investigator who serves the international community
Japan Times Sep 27, 2020

Are Japan’s private investigators public enemy number one?
Beacon Reports Dec 27, 2017

コナンも驚く日本の「私立探偵」の地味な実態
Toyo Keizai Online Dec 29, 2017

Japan's 'evaporated people' have become an obsession for this French couple
PRI Radio (Apr 25, 2017)

Fallen Idol: A Kyoko Nakamura Mystery (Nakamura Detective Agency) by Percival Constantine
Contribution to Novel (Dec 24, 2016)
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