86		Speed (J-pop, Ballad, Synth-pop, 1996-2012)
83		Miki Imai (J-pop, Pop Rock, Vocal, 1987-2000)
83		Shizuka Kudo (J-pop, Italo-Disco, Ballad, 1987-2000)
82		Maaya Sakamoto (J-pop, Pop Rock, Ballad, 1997-2015)
82		Kana Nishino (J-pop, Ballad, Vocal, 2009-2016)
80		Mai Kuraki (J-pop, Synth-pop, Ballad, 1999-2014)
78		Morning Musume (J-pop, Vocal, Pop Rock, 1998-2015)
78		Original Love (J-pop, Pop Rock, Future Jazz, 1991-2011)
77		Nami Tamaki (J-pop, Synth-pop, Ballad, 2003-2010)
76		Crystal Kay (J-pop, RnB/Swing, Ballad, 1999-2010)
75		Chisato Moritaka (J-pop, Synth-pop, Euro-Disco, 1987-2009)
75		AKB48 (J-pop, Karaoke, Vocal, 2006-2015)
75		Dreams Come True (J-pop, Fusion, Swing, 1989-2010)
74		Smap (J-pop, Karaoke, Breakbeat, 1994-2008)
74		Alan (J-pop, Ballad, Synth-pop, 2005-2014)
74		Misia (J-pop, Ballad, House, 1998-2016)
74		Takako Uehara (J-pop, Ballad, Electro, 1999-2004)
74		Beni Arashiro (J-pop, RnB/Swing, Ballad, 2004-2013)
74		Puffy (J-pop, Pop Rock, Synth-pop, 1996-2013)
73		Eriko Imai (J-pop, Pop Rock, Rhythm & Blues, 2000-2013)
73		Chage & Aska (J-pop, Pop Rock, Vocal, 1981-2001)
73		Tohoshinki (J-pop, Synth-pop, Ballad, 2004-2015)
72		Miliyah Kato (J-pop, RnB/Swing, Ballad, 2004-2016)
72		Nana Mizuki (J-pop, Synth-pop, Disco, 2000-2015)
72		Yuki (J-pop, House, Synth-pop, 2002-2016)
72		SE7EN (J-pop, Ballad, Electro, 2003-2013)
72		My Little Lover (J-pop, Pop Rock, Synth-pop, 1995-2008)
72		Maki Goto (J-pop, Synth-pop, 2001-2011)
72		Ryuichi Kawamura (J-pop, Ballad, Pop Rock, 1997-2013)
71		Negicco (J-pop, Disco, Synth-pop, 2003-2015)
71		Moumoon (J-pop, Synth-pop, Soft Rock, 2007-2015)
71		MEG (J-pop, Electro, House, 2001-2012)
71		Tomomi Kahala (J-pop, Synth-pop, Ballad, 1996-2014)
71		Hitomi Shimatani (J-pop, Synth-pop, RnB/Swing, 1999-2014)
70		Sakura Gakuin (J-pop, 2010-2015)
70		Joe Inoue (J-pop, Death Metal, Ballad, 2007-2010)
70		Megumi Hayashibara (J-pop, UK Garage, Latin, 1991-2003)
70		Hitomitoi (J-pop, Indie Pop, Synth-pop, 2005-2015)
69		Egoist (J-pop, Ballad, 2011-2015)
69		Dempagumi.inc (J-pop, 2010-2015)
69		Sotaisei Riron (J-pop, Experimental, 2008-2016)
69		AAA (J-pop, Synth-pop, Pop Rock, 2005-2014)
69		Aiko Kayō (J-pop, Euro House, 2003-2007)
69		m-flo (J-pop, House, Breakbeat, 1998-2007)
68		Kyoko Koizumi (J-pop, Acid House, House, 1982-2001)
68		Day After Tomorrow (J-pop, Pop Rock, Soft Rock, 2002-2005)
68		Tokyo Girls' Style (J-pop, Synth-pop, 2010-2013)
68		Namie Amuro (J-pop, Synth-pop, Ballad, 1994-2016)
67		Boa (J-pop, Synth-pop, Ballad, 1975-2015)
67		ACO (J-pop, Downtempo, Trip Hop, 1998-2015)
67		Kalafina (J-pop, Modern, Modern Classical, 2008-2015)
67		Minmi (J-pop, Hip-House, Pop Rap, 2003-2010)
67		Clammbon (J-pop, Downtempo, Post Rock, 1999-2015)
67		Leah Dizon (J-pop, Synth-pop, Ballad, 2007-2008)
67		Tommy february6 (J-pop, Synth-pop, New Wave, 2001-2013)
66		Chocolat (J-pop, Dance-pop, 1997-2001)
66		Tatsuro Yamashita (Soul, J-pop, Funk, 1976-2013)
66		Sound Horizon (J-pop, Prog Rock, Symphonic Rock, 2001-2015)
65		Dream (J-pop, Synth-pop, Hi NRG, 2000-2010)
65		Chara (J-pop, Pop Rock, Synth-pop, 1991-2009)
65		fripSide (J-pop, Vocal, Electro House, 2009-2016)
65		Bonnie Pink (J-pop, Indie Pop, Pop Rock, 1995-2012)
64		Exile (J-pop, RnB/Swing, Disco, 2001-2015)
64		Hatsune (J-pop, Synth-pop, 2009-2011)
64		Supercell (J-pop, 2009-2013)
64		Lia (J-pop, Ballad, Trance, 1988-2015)
64		Halcali (J-pop, Pop Rap, Electro, 2003-2010)
64		Double (J-pop, RnB/Swing, Rhythm & Blues, 1999-2011)
63		Utada Hikaru (J-pop, Synth-pop, RnB/Swing, 1998-2016)
63		S.E.S. (J-pop, Ballad, Europop, 1997-2002)
63		UA (J-pop, Downtempo, Soul-Jazz, 1995-2016)
63		Girl Next Door (J-pop, Synth-pop, Ballad, 2008-2013)
63		Kahoru Kohiruimaki (J-pop, Synth-pop, Alternative Rock, 1985-2011)
62		True Kiss Destination (J-pop, RnB/Swing, 1999-2000)
62		melody. (J-pop, Progressive House, 2003-2007)
62		Aya Matsuura (J-pop, Techno, 2002-2004)
61		Ai (J-pop, RnB/Swing, Soul, 2001-2012)
61		Capsule (J-pop, Electro, House, 2001-2015)
61		Quruli (J-pop, Indie Rock, Synth-pop, 1997-2009)
61		Seiko Oomori (J-pop, 2012-2015)
60		Miho Nakayama (J-pop, Synth-pop, Disco, 1985-1996)
60		EeL (J-pop, Electro, Synth-pop, 1999-2011)
60		Earth (J-pop, Drum n Bass, Gabber, 2000-2001)
60		Hayami Kishimoto (J-pop, House, Synth-pop, 2003-2006)
60		Etsuko Yakushimaru (J-pop, Experimental, IDM, 2009-2014)
60		m.c.A·T (J-pop, Pop Rap, Pop Rock, 1993-2007)
59		Mari Iijima (Synth-pop, J-pop, Ballad, 1983-2014)
59		Mika Nakashima (J-pop, Downtempo, Smooth Jazz, 2001-2008)
59		MAX (J-pop, Synth-pop, Hi NRG, 1995-2015)
59		Kat-Tun (J-pop, Pop Rock, Hard Rock, 2006-2016)
59		Charisma.com (J-pop, Hip Hop, Pop Rap, 2013-2016)
59		High And Mighty Color (J-pop, Pop Rock, Hard Rock, 2005-2010)
57		Yasuyuki Okamura (J-pop, Electro, Synth-pop, 1987-2014)
57		Kumi Koda (J-pop, Synth-pop, Ballad, 2000-2016)
57		Kotoko (J-pop, Soundtrack, Theme, 2002-2013)
57		SCANDAL (J-pop, Garage Rock, Alternative Rock, 2008-2016)
57		Orange Caramel (J-pop, Dance-pop, Synth-pop, 2012-2014)
57		Reimy (J-pop, Synth-pop, 1984-1992)
56		Every Little Thing (J-pop, Pop Rock, House, 1996-2015)
55		(((sssurrounddd))) (J-pop, 2012-2015)
55		Nokko (J-pop, Synth-pop, Progressive House, 1992-2010)
55		Orange Range (J-pop, Alternative Rock, Techno, 2002-2007)
55		You'll Melt More! (J-pop, New Wave, Krautrock, 2013-2016)
55		Aya Hirano (J-pop, Pop Rock, Soundtrack, 2006-2013)
55		MOSAIC.WAV (J-pop, Europop, Synth-pop, 2004-2012)
54		Ami Suzuki (J-pop, Synth-pop, House, 1998-2014)
54		Ayumi Hamasaki (J-pop, Pop Rock, Synth-pop, 1995-2016)
54		Kumiko Yamashita (J-pop, Pop Rock, Synth-pop, 1980-1995)
54		Toshinobu Kubota (J-pop, Soul, Funk, 1986-2015)
54		Shiina Ringo (J-pop, Alternative Rock, Indie Rock, 1998-2015)
53		Kanon Wakeshima (J-pop, Neo-Classical, Baroque, 2008-2015)
53		Miki Nakatani (J-pop, Synth-pop, Dub Techno, 1996-2001)
53		dip in the pool (J-pop, New Wave, Ambient, 1985-2015)
52		Akiko Yano (J-pop, Synth-pop, Vocal, 1976-2014)
52		Sandii (Vocal, J-pop, Pacific, 1974-2008)
52		Neil & Iraiza (J-pop, Pop Rock, Lo-Fi, 1997-2003)
51		Mami Kawada (J-pop, Synth-pop, Pop Rock, 2005-2015)
51		Gunther Neefs (Ballad, Vocal, Chanson, 1991-2011)

Notes: Music similar to Ken Hirai, Music like Ken Hirai, Pop, Funk, Soul, Electronic, Hip Hop, Jazz, J-pop, Ballad, Soul, Pop Rap, Vocal, Bop, Rhythm, Blues, Euro House, House, RnB, Swing, Artists, Bands, Songs, Audio, Records, Albums, Singles, Releases, Music Similarities