Ken Hirai
is a Japanese R&B and pop singer. Since his debut, Hirai has worked as a model, actor, composer, lyricist, singer, and brand ambassador.
During his career, Hirai has released 45 singles and nine studio albums as of January 2019.Oricon
, established in 1999, is the holding company at the head of a Japanese corporate group that supplies statistics and information on music and the music industry in Japan and Western music. It started as, which was founded by Sōkō Koike in Nov ...
sales chart
Billboard Japan
''Billboard Japan'' is a sister organization of the U.S.-based music magazine ''Billboard''. It is operated by the Japanese Osaka-based company Hanshin Contents Link (a subsidiary of Hanshin Electric Railway), holding an exclusive licence from ''Bi ...