Debuted as a composer in 1988 with ‘Utako / RUNNER’ (theme song for the TV drama ‘Family of Doubt’). Worked at Gen Planning from 1989 to 2005, Epicuras from 2006 to 2008, and has been with Capriccio Music Inc since 2015. Notable works include: Shōnen Tai / Believe (1990 AL) Mihoko Morikawa / 99 Generation (1994 SG) DOMINO (1996 SG) Miho Nakayama / ANGEL SOUL (1997 AL) Gigi Leung / Good Timing (2000 AL) Yumi Kakazu / Soul TWINS (2004 SG) Miho Morikawa / half of me (2021 AL)
Artist debut in 2000 with the single ‘largo/new world〜願い〜’ as the unit Largo with Utaiko. Released the album ‘a song’.
Formed the visual music unit kazsin with Kazuhiro Ishikawa in 2006. Nippon TV ‘Galileo's Gene (2008)’ Japan Swimming Federation official anthem ‘Suimu’ (2010) TV Asahi ‘Hōdō Station ~ New Sports Theme ’MOVE ON‘ (2010)’ TV Anime ‘Gifū Dōdō!! (2013)’ TV Asahi ‘FIA Formula Championship (2015)’ TV Asahi ‘Hōdō Station (2016)’ Nippon Broadcasting System ‘Show Up Nighter OP Theme’ (2017) TV Asahi ‘Saturday Station & Sunday Station’ (2017) TV Asahi ‘World Gymnastics Theme’ (2017) TV Asahi ‘Figure Skating GP Series Theme’ (2017) TV Asahi Sports Support Song ‘CAN DO’ (2020) etc.
In 2016, formed the music production unit Capriccio Project with Masayoshi Hanasaki. TV anime ‘Shimajiro's Wao!’ (2018), film ‘Lady in White’ (starring Miyu Yoshimoto) (2018), and released original CDs ‘Capriccio Project / Capriccio Music Library Vol.1 & Vol.2’ (2019), Aki Okui / Trophy (2019), the theme song ‘ENA / Tatoe tomoni’ for ‘Olympia Soirée’ (2020), and sound production for ‘Nostalgic New Japanese Songs (sung by Mariko, Aki Okui, Davy Bergier)’ (2022).
Additionally, he is actively pursuing a solo career, releasing his first single under his own name, ‘Shinya Naito / Ai no Kaze ni Notte’ (2021), and EP ‘Shinya Naito / Hug Myself’ (2022).
Most recently, he has expanded his scope, including music (kazsin) for TV Asahi's ‘Wellness’ (2024), LIV MOON/CRAVING (2024), Luminous/Wish〜Seeds of Love〜 (2024), and the stage play ‘Maeda Keiji Kabuki Journey’ (2025), as well as arranging the theme song ‘ENA/Dream Flutter’ for the game ‘Olympia Soirée catharsis’ (2025).
His motto is ‘Never rush; take your time to create good music!’ His dream is to one day participate in producing music for AKB48!!