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.

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.
Spectrum OSO Asia (Japan Office)
Business and competitive intelligence services. Tokyo office is located at NITTO Building 6F, 126 Yaraicho, Shinjuku-ku.
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.
Argus Research
Private investigator. Tokyo office located at Yamada Building 2F, 5-18-11 Nishi-Nippori, Arakawa-ku.
Japan Private Investigator
Private investigation and risk protection group.
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.
Private Detective AG
Private Detective Agency in Tokyo, Japan. Office located at 3-2-27 Nishi-Shinjuku.
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.