Ken Hirai Films Vol.13 『Ken Hirai 20th Anniversary Opening Special ! (shin
Amazon.co.jp: Ken Hirai Films Vol.13 『Ken Hirai 20th,ワードレコーズ・ダイレクト / 【通販限定特別価格】Ken Hirai,Amazon.co.jp: Ken Hirai Films Vol.13 『Ken Hirai 20th,JAPANESE SINGER - Album by Ken Hirai | Spotify,Hirai Ken to release an anniversary book | tokyohive