He worked in marketing at Dentsu and Mixi, and was involved in consulting for various companies.
In 2013, he established ""Digramlabo.
Currently, he is conducting research on ""Digram,"" which uses psychology x statistics to analyze human nature and provide counseling.
He is a visiting professor at Kyoto University of Arts.
His latest book is ""Moshi Anata Ga Tabemono Dattara Seikaku Shindan"" (If You Were Food, Personality Diagnosis) (POPLAR PUBLISHING CO., LTD.).
He has also appeared on ""Honma-dekka! TV (Fuji Television Network) and ""Sukkiri! （Nippon Television Network Corporation) and ""Ariyoshi Seminar"" (Nippon Television Network Corporation).

About the Digram diagnosis :
A personality assessment program based on statistics and psychology.
Psychological tests with 20 questions based on the egogram are regularly conducted on 370,000 research monitors. A statistically processed database is being built.
More than 50 million diagnoses have been made. As of March 2023
The system is designed to provide feedback on the basic personality, interpersonal relationships, love, work, and other tendencies of people with the same personality type by referring to the database after the subject answers the 20-question psychological test.
Basic personality types are graphed and displayed as waveforms (high/low) of five indicators: CP (harshness), NP (gentleness), A (rationality), FC (free-spiritedness), and AC (cooperativeness). Currently, there are 31 waveform patterns.