About fees
Investigation fees vary according to the number of investigators required, the hours involved, and the region. Rather than publishing a fixed price list, we provide a quotation after hearing the details of your situation.
Sakura Sachiko Detective Office
English-Speaking Private Detective Agency in Japan
Investigations in Japan, arranged in English
Sakura Sachiko Detective Office is a detective agency registered under The Detective Business Act of Japan. We operate from 30 offices nationwide and handle consultations and reporting in English.
We work with clients living in Japan as well as clients living overseas whose case concerns someone or something inside Japan.
Contact details (shown in the first view)
Phone (within Japan)
0120-089-390
Toll-free
Phone (from overseas)
+81-22-797-0289
Email
info@sakurasachiko.jp
Hours 10:00-17:00 (JST, UTC+9)
Credentials
Company Legitimacy
If you are contacting us from outside Japan, you may want to verify first that we are a legitimate, registered agency. Here is that information up front.
- Registration
- No. 10070117 (head office, Sapporo) / No. 30140203 (Tokyo office). All 30 offices are separately registered.
- Registered with
- Hokkaido Public Safety Commission (head office) / Tokyo Metropolitan Public Safety Commission (Tokyo office); each office with its own prefecture
- Established
- 1988
- Offices
- 30 offices across Japan
- Memberships
- World Association of Detectives (W.A.D.) / Japan Missing Person Search Cooperation Organization (MPS Japan)
Case Studies
In November 2024, our representative was invited to serve as a judge at the 2nd BugPan 2024 Black Box Challenge Match, held in Shenzhen, China. The event was organised by RC2 (Shanghai Ruikan Information Technology Consulting Co., Ltd.) and brought together information security specialists from a number of countries.
Services
What We Investigate
Most of our work is carried out within Japan, and we can also take on cases in a number of countries overseas. The following are the areas we handle most often.If your situation is not listed here, please still get in touch.
- Locating People in JapanWe trace the whereabouts of people in Japan who are otherwise unreachable.
- Background and Identity VerificationWe verify factual information about business contacts, partners, or anyone whose identity you need confirmed.
- Corporate InvestigationsWe confirm whether a company in Japan genuinely exists and operates, and we investigate incidents occurring inside those companies.
- SurveillanceWe observe and document subjects movements, and provide written reports.
- Infidelity and Divorce EvidenceWe investigate spousal or partner relationships and gather evidence.
- Bug and Hidden Camera DetectionWe inspect homes and offices for concealed listening or recording devices.
- Digital ForensicsWe preserve and analyse data held on electronic devices in a form that can be used in legal proceedings.
Coverage
30 Offices Across Japan
Wherever in Japan your case is located, we can begin from the nearest office.
We maintain 30 offices throughout Japan, each staffed with its own investigators. If the subject lives in a rural area, or if the investigation involves travel between regions, our offices coordinate with one another to cover it.
If you live outside Japan, you do not need to travel here. Everything from the first consultation to the delivery of the final report can be handled remotely.
Process
How It Works
If you have never worked with a detective agency before, here is how a case proceeds, in four stages.
- ConsultationContact us by phone, email, or LINE. There is no charge at this stage.*
- Quotation and contractWe provide a quotation based on what the investigation requires. We proceed to a contract only once you are satisfied with the quotation.
- InvestigationOur investigators carry out the work on the ground, and we keep you updated as it progresses.
- ReportWe compile the findings into a written report and deliver it to you.
Confidentiality
What you tell us, and anything we find during an investigation, is disclosed to no one but you. We are bound by confidentiality obligations under The Detective Business Act of Japan. Access to case information is restricted internally as well.
* You may consult us without giving your name at this stage.
Company
Company Information
| Company name | IIS Corporation |
|---|---|
| Trading as | Sakura Sachiko Detective Office |
| Established | 1988 |
| Head office | NCO Sapporo Bldg. 12F, Nishi 1-2-6, Kita 7-jo Kita-ku, Sapporo, Hokkaido 060-0807, Japan |
| Tokyo office | Pacific Century Place 13F, 1-11-1 Marunouchi, Chiyoda-ku, Tokyo 100-6213, Japan |
| Offices | 30 across Japan |
| Registration | No. 10070117 (Sapporo) / No. 30140203 (Tokyo), plus 28 further registrations |
| Memberships | World Association of Detectives (W.A.D.) / Japan Missing Person Search Cooperation Organization |
| Advisor | Narumi Sasaki, former detective (Assistant Inspector), Saitama Prefectural Police Headquarters |
FAQ
Frequently Asked Questions
- How much does an investigation cost?
Fees depend on the number of investigators, the hours involved, and the region, so we do not publish a single fixed rate. We will hear the details of your situation and then provide a quotation. There is no charge for the consultation or the quotation.
- Can I pay from outside Japan?
Yes. We accept payment by international bank transfer.
- Will the contract be in English?
Yes. We provide an English-language version of the contract.
- Can I receive the report in English?
Yes. We can provide the investigation report in English.
- Can you investigate outside Japan?
In principle, yes. However, there are countries and regions where we are unable to operate, depending on local law and conditions. Please tell us the country or region at the consultation stage and we will confirm whether we can take the case.
- Can I consult you anonymously?
Yes. You do not need to give your name at the consultation stage. When you enter into a contract, we are required to verify your identity under The Detective Business Act of Japan.
Contact
Contact Us
We can assist you in English. Please note that the number to call differs depending on whether you are calling from inside or outside Japan.
Hours 10:00-17:00 (JST, UTC+9)
If you are contacting us from a different time zone, messages received outside these hours will be answered on the next business day. Email is usually the easier option from abroad. We reply to email enquiries within five business days. If your matter is urgent, please call us during our opening hours.