He worked for them in the R&D1 department, and later joined Nintendo Software Planning and Development. Tajima often collaborates with other composers, particularly Kenji Yamamoto. Tajima composed Metroid Prime Pinball (in collaboration with Yamamoto) and Metroid Prime 3: Corruption (in collaboration with Yamamoto and Minako Hamano), and provided music support for Metroid: Samus Returns. Tajima has also composed for games related to the Metroid series, such as Galactic Pinball, WarioWare: Touched!, Super Smash Bros. Brawl, Donkey Kong Country Returns and Super Smash Bros. for Nintendo 3DS and Wii U.