Private Investigators & Detectives

English-speaking detectives that perform undercover work including stake outs, following cheating spouses or lovers, child abduction cases, divorce, mystery shopping, competitive intelligence, locating missing people and private investigative work.

Investigations Japan
Investigations Japan helps solve cases of fraud, blackmail, stalking, spousal infidelity, embassy proxy services, stop divorce, stop adoption, copyright search, pre-employment background check & more.
Japan Private Investigator
Private investigation and risk protection group.
Spectrum OSO Asia (Japan Office)
Business and competitive intelligence services. Tokyo office is located at NITTO Building 6F, 126 Yaraicho, Shinjuku-ku.
D-Quest Incorporated
Full range of intelligence and risk management services, from due diligence to background checks, competitor intelligence and intellectual property rights protection. Located at Ryumeikan-honten Building 12F, 3-4 Kandasurugadai, Chiyoda-ku.
Argus Research
Private investigator. Tokyo office located at Yamada Building 2F, 5-18-11 Nishi-Nippori, Arakawa-ku.
Competitive intelligence, fraud, spousal infidelity, locating missing people
Private Detective AG
Private Detective Agency in Tokyo, Japan. Office located at 3-2-27 Nishi-Shinjuku.
Teitan Co., Ltd. (Teikoku Private Detective Agency)
Japan private detective agency that provides investigative services such as: Background investigations, Spouse/partner surveillance, Missing persons, Undercover work, Stakeout, Photography, Japanese records research, Missing persons, Child abduction, Trad...
Tokyo Tantei Chosa-shi Kai
Nationwide hotline for people search.
Galu Agency
Detective agency for personal state and corporate relationship research. Located at Izumishoji Hitotsugi Building 5F, 3-19-9 Akasaka, Minato-ku, Tokyo 107-0052.