He is on the books of Eintracht Frankfurt and wears shirt number 26. At international level, he features for Japan U20. His main role on the pitch is Defender. He measures 168cm in height and weighs 64kg. His stronger foot is Left. His estimated market valuation currently stands at 5M €.

His latest transfer saw him join Eintracht Frankfurt from Djurgardens via Free on 2026-01-01. The move was reported at 6.5M €.

Across the Bundesliga 2025-2026, Keita Kosugi appeared in 7 matches and averaged 0 tackles, 0 interceptions, 0 clearances, and 0 blocked shots per game.