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About Us 弊社概要

Yaminotantei is an American and Japan-based private investigation agency that seeks information and investigates corruption on behalf of our various clients. We are a licensed private investigator that can complete assignments and do background checks, corporate investigations, license plate checks, perform surveillance for extended periods and detect and reveal information that may be hidden or unavailable through a usual search, and much more. Also, when investigations initiate for relatives or friends, it is important to ensure the parties are within legal compliance so that violations of the law do not occur with any local, state, or federal regulations governing licensed private investigators in these situations. If these offenses affect the individual, there are extensive fines that usually cause a significant financial burden along with some jail time in certain instances. It is worthy of note that we are professionals with years of experience in the investigation field. We seek to provide the greatest amount of safety to clients when taking on a case. This means we can handle ourselves, and we are dedicated to the clients at all times.




We are aware that running a standard private investigation agency can be demanding which is why we are well trained and equipped to perform excellently well. Yaminotantei is a client-focused and result-driven private investigation agency that provides broad-based investigative services and other tactical solution services at an affordable fee that won’t in any way put a hole in the pocket of our clients.


We will offer standards and professional detective services such as the search for information about legal, financial, and personal matters in many places, depending on the assignment or case. It could be spending more time in offices, researching cases on computers, and sometimes in the field, conducting interviews and performing surveillance. Private detectives and investigators often work irregular hours to bring satisfying results to all our clients, and corporate clients at local, state, national, and international levels.


We will ensure that we work hard to meet and surpass our clients’ expectations whenever they contract their investigation concerns to our organization. At Yaminotantei, our client’s best interest would always come first, and everything we do is guided by our values and professional ethics. We will ensure that we hire professionals who are well experienced in a wide variety of private security services.






Yaminotantei will at all times demonstrate her commitment to sustainability, both individually and as a firm, by actively participating in our communities and integrating sustainable business practices wherever possible. We will ensure that we hold ourselves accountable to the highest standards by meeting our client’s needs precisely and completely. We will cultivate a working environment that provides a human, sustainable approach to earning a living, and living in our world, for our partners, employees, and our clients. We plan to position Yaminotantei to become one of the leading brands in the private investigation services industry in the United States of America, Japan, and throughout the world.


Detective Masaji is the owner of Yaminotantei. He has more than 20 years of experience in the industry and will bring in professional investigative agents to carry out service operations. We will make sure that we take all our investigative agents through the required training that will position them to meet the expectation of the agency and to compete with other players in the United States, Japan, and throughout the globe.


Mission Statement


Our mission is to provide professional and trusted private investigation services that assist individuals, businesses, and non-profit organizations. We are to position the business to become the leading brand in the private investigation services industry in the whole of the United States and Japan.


Vision Statement

Our vision is to build a private investigation service company that will become the number one choice for clients throughout the United States and Japan. To achieve this vision, we will be the leading provider of private investigation services establishing ourselves as the trusted detective partner of corporations, private clients, and governments worldwide, and providing trustworthy, fully vetted investigative information on a global scale.






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