The 26-year-old who can play in a variety of midfield and defensive positions, previously worked under Celtic manager, Ange Postecoglou at Yokohama F Marinos and joins former teammate Daizen Maeda in the growing contingent of Japanese players at Celtic Park.
After beginning his senior career at Oita Trinita, where he made over 100 appearances and scored 7 goals, Tomoki then moved to Yokohama F. Marinos where he played 66 times across two seasons.
Tomoki’s impressive performances helped the Yokohama F. Marinos lift the 2022 J. League Championship and saw him voted Player of the Year as well as being named in the League’s the ‘Best XI of the season’.