Masao Seki (関雅夫, Seki Masao) is a composer who wrote the music for Crossing Time..., an image song from the anime.
Masao has written the lyrics and has written the music for several other songs, and has been part of several other groups.
- His birthdate is August 13, 1955. He is currently 59 years old.
- His blood type is B.
- His birthplace is the Shizuko Prefecture in Japan .