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Cheating Partner Investigation in Japan

Cheating, infidelity, adultery, being unfaithful, having an affair, whatever you call it. It is likely to be one of the most painful and devastating things that can happen to you.

If you suspect that your partner or spouse is cheating, you want to confirm your suspicion as soon as possible. You may try to uncover the truth yourself but oftentimes this could cause your partner to become even more secretive. Employing a private investigator to check on your partner is a difficult decision, however not knowing the truth could be more difficult.

It’s never easy to deal with suspicions of infidelity, but with us, you can get the information that you need to move forward with your life. Tokyo Private Eye is here because, without evidence, the truth is just an allegation.

Signs of Cheating

  • The phone goes everywhere with them – even the bathroom

  • They are more focus on their appearance

  • Unexplained expenses

  • Emotional intimacy has faded

  • They are always running late

  • You can’t find them or reach them

  • Their schedule is suddenly different



No matter how good your relationship is, there are times when you suspect your girlfriend, boyfriend, partner, fiance, or spouse of cheating. Infidelity is a common issue, although it’s a serious problem faced by people in a relationship. Handling the situation yourself can make do things which you might regret later on. It can be emotionally painful and physically tiring. Tokyo Private Eye will provide the necessary evidence to prove your suspicions with irrefutable and undeniable proof.



Want to know what someone is doing behind your back? We understand that all surveillance cases have their unique features. Our surveillance private investigators use the latest and best technology to document evidence and questionable activity. We will observe and record the subject’s movements and interactions.

If you are facing any problem that needs surveillance, we can help you solve your case with the best result within the shortest span.



Before committing to a relationship with a person, you want to know they are whom they say they are.

If you have doubts that your partner might still be married, or even living with someone, we are here to confirm the relationship status of that person.

We can also help you find out the previous relationships, love affairs, or any sort of commitments, and even marital and divorce history of that person.



If you have observed concerning behavior or are suspicious about the behavior of your partner, spouse, child’s fiance, etc. and want to determine whether your instincts are right, our expert investigators use covert surveillance.

It is the ideal way to gather the clearness you’ll need to progress your case or prove your point.

If you need any evidence or confirmation of your suspicions, this service is the best way to achieve your objectives.




28 Years Old / Tokyo / Female Lately, her boyfriend works too late and suddenly has a lot of business trips. Every time she tries to call him, he doesn't answer and instead just message her that his busy. She wants to know the truth if he's working during that time.

4 Hours x 1 Day............................. ¥ 70,000

Transportation Fee ...................... ¥ 15,000

Advice for the Situation............... ¥ 0

Introduce Experts based on need ¥ 0


¥ 85,000


43 Years Old / Nagoya / Female She wants to have a divorce with her husband, but her husband doesn't want to. She doesn't have enough proof of her husband's infidelity. She wants to have proof of his husband's infidelity and know the identity of her husband's lover.

3 Hours per day x 3 Days........... ¥ 144,000

Transportation Fee ...................... ¥ 25,000

Advice for the Situation............... ¥ 0

Introduce Experts based on need ¥ 0


¥ 169,000


55 Years Old / Tokyo / Male

His wife cheated on him many times with the same person. He wants to have proof of his wife's adultery. He wants to know more about the background of his wife's lover and to stop her wife from doing it again.

3 Hours per day x 3 Days........... ¥ 144,000 Background Investigation............ ¥ 50,000

Transportation Fee ...................... ¥ 45,000

Advice for the Situation............... ¥ 0

Introduce Experts based on need ¥ 0


¥ 239,000

The cost of a private investigator depends on the services required. Each case is different and there are different rates depending on the services required. The cost will depend on what you are looking for, the case scenario, the amount of work or time required, and the locations. We can provide a quote on the application once we have discussed and assessed your requirements.

We will always endeavor to work within your budget to get you the results you need. We always ensure clients fully understand what they will be paying before we start the investigation.