Kotaro Arima is a professional footballer from JPN and is currently 26 years old. He is on the books of Oita Trinita and wears shirt number 9. His main role on the pitch is Forward. He measures 181cm in height and weighs 71kg. His stronger foot is Right. His estimated market valuation currently stands at 400K €.

His latest transfer saw him join Oita Trinita from Iwaki FC via on 2025-01-20.

During the Japanese J2 League 2025 campaign, Kotaro Arima made 27 appearances, scoring 5 goals and adding 1 assists. He averaged 0.2 goals per match from 64 shots, with 14 on target.