Ryuichi Kosugi

Ryuichi Kosugi was born on July 5, 1973 in Kyōto, Kyōto Prefecture, Japan. In 2014, Kosugi appeared in the film One Third, credited in the role of Ken. The work remains Kosugi’s only documented film credit according to available records.

Beyond the single listed filmography entry, no additional verified credits or professional details are recorded. Kosugi’s involvement in the film industry is therefore limited to this documented appearance. No other roles, departments, or collaborations are confirmed in the available data.