| Artist: | Ken Hirai |
| Studio: | 10 |
| Video: | 13 |
| Compilation: | 2 |
| Tribute: | 3 |
| Option: | 1 |
| Option Name: | Remix album |
| Singles: | 40 |
The discography of Japanese R&B and pop singer Ken Hirai consists of ten studio albums, two compilation albums, one remix album, three cover albums, thirteen video albums and numerous singles and promotional singles. Hirai debuted as a musician under Sony Music Records in 1995 with the single "Precious Junk", but found success five years later with the single "Lakuen" and his third album, The Changing Same.
Hirai's success continued through the 2000s, with the single "Ōki na Furudokei" (2002), a Japanese-language version of "My Grandfather's Clock", an 1876 song by American composer Henry Clay Work, "Hitomi o Tojite" (2004), the theme song for the film Crying Out Love, In the Center of the World and "Pop Star" (2005), the theme song of the Misaki Ito-starring drama Kiken na Aneki.
In addition to his studio albums, Hirai has released a series of acoustic cover albums entitled Ken's Bar, named after a series of concept live concerts he performs.
All release dates pertain to their release in Japan, unless stated.
| Title | Album details | Peak positions | Sales (JPN)[1] | Certifications | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| JPN [2] | KOR Overseas [3] | TWN [4] | TWN East Asian [5] | |||||||||
| Un-balanced |
| 57 | — | — | — | 18,000 | ||||||
| Stare At |
| — | — | — | — | |||||||
| The Changing Same |
| 1 | — | — | — | 1,265,000 |
Million[6] | |||||
| Gaining Through Losing |
| 1 | — | — | — | 1,081,000 | ||||||
| Life Is... |
| 1 | — | — | — | 806,000 |
| |||||
| Sentimentalovers |
| 1 | — | — | 1 | 1,661,000 |
| |||||
| Fakin' Pop |
| 2 | — | 6 | 2 | 332,000 |
| |||||
| Japanese Singer |
| 3 | 10 | — | 12 | 141,000 |
| |||||
| The Still Life |
| 4 | — | — | — | 72,000 | ||||||
| 2 | — | — | — | 25,521 (physical) | ||||||||
| "—" denotes items which were released before the creation of the G-Music or Gaon Charts, or items that did not chart. | ||||||||||||
| Title | Album details | Peak positions | Sales (JPN) | Certifications | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| JPN | KOR Overseas | TWN | TWN East Asian | |||||||||
| 1 | — | 3 | 1 | 2,107,000 |
| ||||||
| 5 | 51 | — | 15 | 44,000 | |||||||
| 2 | — | — | — | 77,000 | |||||||
| "—" denotes items which were released before the creation of the G-Music or Gaon Charts, or items that did not chart. | ||||||||||||
| Title | Album details | Peak positions | Sales (JPN) | Certifications | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| JPN | KOR [15] | KOR Overseas | TWN East Asian | |||||||||
| Ken's Bar |
| 2 | — | — | — | 492,000 |
| |||||
| Ken's Bar II |
| 2 | — | — | 6 | 122,000 |
| |||||
| Ken's Bar III |
| 4 | 22 | 68 | 6 | 58,000 | ||||||
| "—" denotes items which were released before the creation of the G-Music or Gaon Charts. | ||||||||||||
| Title | Year | Peak chart positions | Sales (JPN) | Certifications | Album | |||
|---|---|---|---|---|---|---|---|---|
| Oricon Singles Charts | Billboard Japan Hot 100 [18] | TWN | TWN East Asian | |||||
| "Precious Junk" | 1995 | 50 | — | — | — | 44,000 | Un-balanced | |
| — | — | — | — | |||||
| — | — | — | — | Stare At | ||||
| 1996 | — | — | — | — | ||||
| "Stay with Me" | — | — | — | — | ||||
| "Heat Up" | 1997 | — | — | — | — | Non-album single | ||
| "Love Love Love" | 1998 | — | — | — | — | The Changing Same | ||
| "Lakuen" | 2000 | 7 | — | — | — | 549,000 |
(physical): Platinum[19]
| |
| "Why" | 8 | — | — | — | 211,000 |
| ||
| "Love or Lust" | 6 | — | — | — | 264,000 |
| Gaining Through Losing | |
| "Even If" | 3 | — | — | — | 333,000 |
| ||
| "Miracles" | 2001 | 4 | — | — | — | 240,000 |
| |
| "Kiss of Life" | 2 | — | — | — | 555,000 |
| ||
| "Missin' You (It Will Break My Heart)" | 2002 | 4 | — | — | — | 115,000 |
| Life Is... |
| "Strawberry Sex" | 13 | — | — | — | 49,000 | |||
| 1 | — | — | — | 772,000 |
| |||
| "Ring" | 1 | — | — | — | 322,000 |
| ||
| "Life Is..." | 2003 | 3 | — | — | — | 191,000 |
| |
| "Style" | 12 | — | — | — | 44,000 |
| Sentimentalovers | |
| 2004 | 2 | — | — | — | 893,000 |
| ||
| 5 | — | — | — | 161,000 |
| |||
| 1 | — | — | — | 272,000 |
| |||
| "Pop Star" | 2005 | 1 | 91 | — | — | 244,000 |
| Utabaka / Fakin' Pop |
| 2006 | 2 | — | — | — | 81,000 |
| Fakin' Pop | |
| 2007 | 5 | — | — | — | 119,000 |
| ||
| 5 | — | — | — | 103,000 |
| |||
| "Fake Star" | 6 | — | — | — | 32,000 |
| ||
| 2008 | 6 | 5 | — | — | 40,000< | --39,540--> |
| |
| 80 | ||||||||
| "Itsuka Hanareru Hi ga Kite mo" | 19 | 17 | — | — | 19,000 |
| ||
| "Candy" | 2009 | 7 | 2 | — | — | 14,000 | Japanese Singer | |
| "Boku wa Kimi ni Koi o Suru" | 3 | 1 | — | 16 | 70,000 |
| ||
| "Sing Forever" | 2010 | 7 | 5 | — | — | 16,000 | ||
| "Aishiteru" | 9 | 12 | — | — | 34,000 |
| ||
| "Itoshiki Hibi yo" | 2011 | 7 | 6 | — | — | 31,000 |
| |
| 2012 | 5 | 6 | — | — | 44,000 |
| The Still Life | |
| 2013 | — | 16 | — | — | ||||
(featuring Namie Amuro) | 2014 | 4 | 4 | 17 | 3 | 51,000 |
| |
| < | --Released chronologically before "Soredemo Shitai"--> | 13 | — | 12 | 13,000< | --13,106--> | ||
| 10 | ||||||||
| 2015 | 18 | 18 | — | 11,000 | ||||
| "Plus One" | 2016 | 15 | 20 | — | 10,000< | --10,189--> | ||
| "Time" | 54 | — | ||||||
| 15 | 4 | — | — | 12,000 |
| |||
| 2017 | 7 | 7 | — | — | 17,000 | Ken Hirai Singles Best Collection Utabaka 2 | ||
| "Nonfiction" | 10 | 5 | — | — | 18,000 |
| ||
| 2018 | 18 | 13 | — | — | 7,000 | Anata ni Naritakatta | ||
| 16 | 35 | — | — | 7,000 | ||||
| "Half of Me" | 15 | 17 | — | — | 13,000 |
| ||
| 2019 | — | 39 | — | — | ||||
| "#302" | 11 | 18 | — | — | 9,000 | |||
| 2020 | — | 15 | — | — |
| |||
| Title | Year | Peak chart positions | Album | |
|---|---|---|---|---|
| Billboard Japan Hot 100 | ||||
| "K.O.L." | 2000 | — | The Changing Same | |
| "Gaining Through Losing" | 2001 | — | Gaining Through Losing | |
| "One Love Wonderful World" | — | KH Re-mixed Up 1 | ||
| "Come Back" | 2003 | — | Life Is... | |
| — | ||||
| "The Rose" | — | Ken's Bar | ||
| "Lovin' You" | — | |||
| "Miagete Goran Yoru no Hoshi o" | — | |||
| "You've Got a Friend" | — | |||
| "Faith" | — | |||
| "When You Wish upon a Star" | — | |||
| "ABC" | — | |||
| 2004 | — | Sentimentalovers | ||
| 2007 | — | Fakin' Pop | ||
| 2008 | 49 | |||
| "Stardust" (with Hibari Misora) | 2009 | 54 | Ken's Bar II | |
| "Because of You" | 69 | |||
| "Love (Destiny)" | 77 | |||
| "Heart of Mine" | 68 | |||
| "Wakareuta" (with Masamune Kusano) | 91 | |||
| 2011 | — | Japanese Singer | ||
| "Girls 3x" | — | |||
| "Virtual Insanity" | 2014 | — | Ken's Bar III | |
| "1995" | 2021 | — | Anata ni Naritakatta |
| Title | Album details | Peak positions |
|---|---|---|
| JPN | ||
| Ken Hirai Films Vol. 1 |
| — |
| Ken Hirai Films Vol. 2 |
| — |
| Ken Hirai Films Vol. 3 |
| 17 |
| Ken Hirai Films Vol. 5 |
| 14 |
| Ken Hirai Films Vol. 7 |
| 5 |
| Ken Hirai Films Vol. 9 |
| 49 |
| Ken Hirai Films Vol. 12 |
| 4 |
| Ken Hirai Films Vol. 12 |
| |
| Title | Album details | Peak positions | |
|---|---|---|---|
| JPN | |||
| Ken Hirai Films Vol. 4: Live Tour 2001 Gaining Through Losing at the Budokan |
| 3 | |
| Ken Hirai Films Vol. 6: MTV Unplugged Ken Hirai |
| 8 | |
| Ken Hirai Films Vol. 8: Ken Hirai 10th Anniversary Tour Final at Saitama Super Arena |
| 9 | |
| Ken Hirai Films Vol. 10: Ken Hirai Live Tour 2008 Fakin' Pop |
| 18 | |
| Ken Hirai Films Vol. 11: Ken's Bar 10th Anniversary |
| 6 | |
| Ken's Bar 10th Anniversary Christmas Eve Special |
| 6 | |
| Ken Hirai Films Vol. 13: Ken Hirai 20th Anniversary Opening Special at Zepp Tokyo |
| 19 | |
| Ken Hirai Films Vol.14 Ken’s Bar 20th Anniversary Special |
| 17 | |
| Title | Year | Album | ||
|---|---|---|---|---|
| "Moonstruck" (Chaka with Ken Hirai) | 1996 | With Friends< | --1996-09-21--> | |
| "Holding On to Promises" (Gerry DeVeaux featuring Ken Hirai) | Back to You< | --1996-12-21--> | ||
| 1998 | Setsunai: Tokyo Heart Break Original Soundtrack< | --1998-08-26--> | ||
| (K Dub Shine featuring Ken Hirai) | 2000 | Ikiru< | --2000-12-13--> | |
| "Eyes on You" (Akina Nakamori) | 2002 | Resonancia< | --2002-05-22--> | |
| "You Are the Sunshine of My Life" | 2003 | Conception: Stevie Wonder Tribute< | --2003-03-12--> | |
| "Got Me a Feeling" (Bonnie Pink featuring Ken Hirai) | 2005 | Reminiscence< | --2005-06-22--> | |
| (Ohashi Trio featuring Ken Hirai) | 2012 | White< | --2012-09-19--> | |
| (Toko Furuuchi featuring Ken Hirai) | 2013 | And Then...: 20th Anniversary Best< | --2012-09-19--> |