is a Japanese video game composer. He is often regarded as one of the most influential innovators in chiptune and video game music, producing music in a number of genres including rock, jazz, symphonic, and various electronic genres such as house, electro, techno, and trance.
Koshiro has been cited as creating some of the most memorable game music of the 1980s and 1990s contributing for games such as Nihon Falcom's Dragon Slayer and Ys series, as well as Sega's The Revenge of Shinobi and Streets of Rage series. His mother, Tomo Koshiro, was a pianist. She taught him how to play the piano at the age of three, and by the age of five, he had a strong command of it. In 1975, he began taking music lessons from Joe Hisaishi and studied with him for three years. Everything Koshiro has learned after that has since been self-taught.
While he was still in high school during the early 1980s, Koshiro began composing music on the NEC PC-8801 as a hobby, including mockups of early arcade game music from Namco, Konami, and Sega. The sequencing skills and experience he gained from this would later be utilized in his early video game projects. The video games that influenced him most were The Tower of Druaga (1984), Space Harrier (1985), and Gradius (1985). The video game music soundtracks to these games inspired him to become a video game composer.
In a 1992 interview, Koshiro said that his favorite music genres are new wave, dance music, technopop, classical, and hard rock, and that his favorite Western bands are Van Halen and Soul II Soul.
Nihon Falcom (1986–1988)
Koshiro's first composing job was with Nihon Falcom in 1986 at the age of 18. Falcom used compositions from the PC-8801 demo tape he had sent them in their Dragon Slayer action role-playing game Xanadu Scenario II, for its opening theme and several dungeon levels. He also wrote the opening song in Romancia that same year. His compositions for these early games were influenced by arcade game music and Japanese bands such as The Alfee. He then produced the soundtrack to Dragon Slayer IV / Legacy of the Wizard (1987), which was influenced by the sounds of early Konami games. His most well-known Falcom works are his soundtracks for Sorcerian (1987) and the early Ys games, Ys I (1987) and Ys II (1988). These early music productions mainly featured rock and fusion music.
All of these early soundtracks were produced using the FM synthesis sound chip of the PC-8801. Despite later advances in audio technology, Koshiro would continue to use older PC-8801 hardware to produce many of his later video game soundtracks, including the Streets of Rage and Etrian Odyssey soundtracks. His soundtracks for early Nihon Falcom games, such as the Dragon Slayer and Ys series, are widely regarded as some of the most influential role-playing video game scores. and "progressive, catchy, techno-style compositions"
His soundtrack for ActRaiser (1990), on the other hand, was mainly classical and orchestral. funk and ethnic music. He also attempted to reproduce the Roland TR-808 and TR-909 beats and Roland TB-303 synths using FM synthesis. The soundtrack for Streets of Rage 2 in particular is considered "revolutionary" and ahead of its time, for its "amazing blend of swaggering house synths, dirty" electro-funk and "trancey electronic textures that would feel as comfortable in a nightclub as a video game." The soundtrack also features contributions by Motohiro Kawashima, who also worked at Ancient at the time.
His CD soundtracks became best-sellers in Japan during the early 1990s. In 1993, Electronic Games listed the first two Streets of Rage games as having some of the best video game music soundtracks they "ever heard." They described Koshiro as "just about universally acknowledged as the most gifted composer currently working in the video game field."
Koshiro composed the soundtrack to Streets of Rage 3 (1994), along with colleague Kawashima who contributed in a larger capacity than in 2. He created a new composition method called the "Automated Composing System" to produce "fast-beat techno like jungle." It was the most advanced techno technique of the time, incorporating heavily randomized sequences. The soundtrack also had elements of abstract, experimental, gabber, and trance music.
Koshiro was one of the first composers credited under his real name in a time when several other Japanese developers were credited under pen names.
Later career (1994–present)
Also in 1994, Koshiro co-composed the soundtrack with Kawashima for the Mega-CD version of Eye of the Beholder, a dungeon crawl role-playing video game ported over from the original by Japanese developer Opera House and published by Sega. That same year, his soundtrack for Beyond Oasis utilized a late romantic style of music, which he later also utilized for Legend of Oasis (1996), Merregnon (2004), and Warriors of the Lost Empire (2007).
He also composed the soundtrack for Sega's Shenmue (1999) alongside Takenobu Mitsuyoshi and various others, with Koshiro contributing fifteen original compositions to the soundtrack. Three other staff members of Ancient also worked on Shenmue. He later composed the soundtracks for the Wangan Midnight series (2001 onwards) and Namco × Capcom (2005). These were the first projects where he wrote the lyrics along with the music. For the Wangan Midnight series in particular, his compositions were mostly trance music, a style he was previously unfamiliar with. He was brought back to compose for Streets of Rage 4 in 2020, along with Kawashima and several others. The same year, he composed the theme song "Koroneraiser Inu-More!" for Hololive's virtual YouTuber Inugami Korone. Koshiro also created the opening and ending jingles for the YouTube channel Masahiro Sakurai on Creating Games.
Notable works
{| class="wikitable sortable" width="auto"
! Year !! Title !! Role(s)
|-
! scope=row rowspan="2" | 1986
| Xanadu Scenario II
| Music with Takahito Abe
|-
| Romancia
| Opening theme
|-
!scope=row rowspan="3" | 1987
| Ys I: Ancient Ys Vanished
| Music with Mieko Ishikawa
|-
| Legacy of the Wizard
| Music with Mieko Ishikawa
|-
| Sorcerian
| Music with several others
|-
! scope=row rowspan="2" | 1988
| Ys II: Ancient Ys Vanished – The Final Chapter
| Music with Mieko Ishikawa and Hideya Nagata
|-
| The Return of Ishtar
| Music; MSX version
|-
! scope=row rowspan="2" | 1989
| The Revenge of Shinobi
| Music
|-
| Bosconian
| Music with Hideya Nagata; X68000 version
|-
! scope=row rowspan="2" | 1990
| Misty Blue
| Music
|-
| ActRaiser
| Music
|-
! rowspan="3" scope="row" | 1991
| The G.G. Shinobi
| Music
|-
| Streets of Rage
| Music
|-
| Sonic the Hedgehog
| Music; Master System / Game Gear version
|-
! rowspan="4" scope="row" | 1992
| Super Adventure Island
| Music
|-
| Eye of the Beholder
| Music with Shinji Hosoe; PC-98 version
|-
| The G.G. Shinobi II: The Silent Fury
| Music with Motohiro Kawashima
|-
| Streets of Rage 2
| Music with Motohiro Kawashima
|-
!scope=row rowspan="2" | 1993
| Slap Fight MD
| Music, arrangements
|-
| ActRaiser 2
| Music
|-
! rowspan="3" scope="row" | 1994
| Streets of Rage 3
| Music with Motohiro Kawashima
|-
| Eye of the Beholder
| Music with Motohiro Kawashima; Sega CD version
|-
| Beyond Oasis
| Producer, music
|-
! scope=row rowspan="1" | 1995
| Terranigma
| "Genius's Playground"
|-
!scope=row rowspan="2" | 1996
| Zork I: The Great Underground Empire
| Music with Motohiro Kawashima; PlayStation version
|-
| The Legend of Oasis
| Music, producer
|-
! rowspan="1" scope="row" | 1997
| Culdcept
| Music with Takeshi Yanagawa
|-
! scope=row rowspan="1" |1999
| Shenmue
| Music with several others
|-
!scope=row rowspan="3" | 2001
| Wangan Midnight Maximum Tune
| Music
|-
| Shenmue II
| Music with several others
|-
| Car Battler Joe
| Music with Tomonori Hayashibe
|-
! scope=row rowspan="2" | 2004
| Amazing Island
| Music with Motohiro Kawashima and Tomonori Hayashibe
|-
| Wangan Midnight Maximum Tune
| Music
|-
! scope=row rowspan="3" | 2005
| Wangan Midnight Maximum Tune 2
| Music
|-
| Namco × Capcom
| Opening and ending themes
|-
| Dance Dance Revolution Extreme 2
| "You Gotta Move It"
|-
! scope=row rowspan="2" | 2006
| The Law of Ueki
| Music with Motohiro Kawashima and Takeshi Yanagawa; PlayStation 2 version
|-
| Castlevania: Portrait of Ruin
| Music with Michiru Yamane
|-
!scope=row rowspan="3" | 2007
| Etrian Odyssey
| Music
|-
| Wangan Midnight Maximum Tune 3
| Music
|-
| Katekyo Hitman Reborn! Dream Hyper Battle!
| Music with Motohiro Kawashima and Takeshi Yanagawa
|-
! scope=row rowspan="2" | 2008
| Super Smash Bros. Brawl
| Arrangements
|-
| Etrian Odyssey II
| Music
|-
! scope=row rowspan="2" | 2009
| 7th Dragon
| Music
|-
| Half-Minute Hero
| Music with several others
|-
!scope=row rowspan="5" | 2010
| Dragon Ball Online
| Music
|-
| Etrian Odyssey III
| Music
|-
| Protect Me Knight
| Music
|-
| Jaseiken Necromancer: Nightmare Reborn
| Music with Takeshi Yanagawa
|-
| Criminal Girls
| Opening theme
|-
! scope=row rowspan="2" | 2011
| 7th Dragon 2020
| Music
|-
| Wangan Midnight Maximum Tune 4
| Music
|-
!scope=row rowspan="4" | 2012
| Kid Icarus: Uprising
| Music with several others
|-
| Etrian Odyssey IV
| Music
|-
| Layton Brothers: Mystery Room
| Music with Takeshi Yanagawa
|-
| Time and Eternity
| Music with Takeshi Yanagawa
|-
! scope=row rowspan="3" | 2013
| 7th Dragon 2020-II
| Music
|-
| Etrian Odyssey Untold: The Millennium Girl
| Music
|-
|Code of Joker
|"Shine Radiantly", "Innate Ability"
|-
!scope=row rowspan="5" | 2014
| Wangan Midnight Maximum Tune 5
| Music
|-
| Persona Q: Shadow of the Labyrinth
| "Disturbances - The One Called from Beyond"
|-
| Gotta Protectors
| Music with several others
|-
| Super Smash Bros. for Nintendo 3DS and Wii U
| Arrangements
|-
| Etrian Odyssey 2 Untold: The Fafnir Knight
| Music
|-
!scope=row rowspan="4" | 2015
| Etrian Mystery Dungeon
| Music with Takeshi Yanagawa
|-
| Chunithm
| "Grab Your Sword"
|-
| 7th Dragon III Code: VFD
| Music
|-
| Project X Zone 2
| Opening and ending themes
|-
!scope=row rowspan="2" | 2016
| Puzzle & Dragons X
| Music with Kenji Ito, Akira Yamaoka, and Keigo Ozaki
|-
| Etrian Odyssey V
| Music
|-
!scope=row rowspan="1" | 2017
| Etrian Mystery Dungeon 2
| Music
|-
!scope=row rowspan="7" | 2018
|A Certain Magical Virtual-On
| Music
|-
| Secret of Mana
| Arrangements with several others
|-
| Chrono Ma:Gia
| Music
|-
| Wangan Midnight Maximum Tune 6
| Music
|-
| Etrian Odyssey Nexus
| Music
|-
| Monster Boy and the Cursed Kingdom
| Music with several others
|-
| Super Smash Bros. Ultimate
| Arrangements
|-
!scope=row rowspan="4" | 2019
| SolSeraph
| Opening theme
|-
| Sega Genesis Mini
| Menu theme; dedicated console
|-
| Gotta Protectors: Cart of Darkness
| Music
|-
| The TakeOver
| Opening stage theme
|-
! scope=row rowspan="3" | 2020
| Gibiate
| Anime
|-
| Streets of Rage 4
| Music with several others
|-
| The Wonderful 101: Remastered
| Arrangements with several others
|-
! scope=row rowspan="2" | 2021
| Actraiser Renaissance
| Music, arrangements
|-
| Royal Anapoko Academy
| "As God and As Man"
|-
!scope=row rowspan="3" | 2022
|Sol Cresta
| Music
|-
| Sin Chronicle
|"Hikari・Kibou"
|-
| Sega Genesis Mini 2
| Menu theme; dedicated console
|-
!scope=row rowspan="1" | 2023
| Cubic Stars
| Main theme
|-
! rowspan="2" scope="row" | 2025
| Earthion
| Music, game direction
|-
| Shinobi: Art of Vengeance
| Music with Tee Lopes
|-
! rowspan="1" scope="row" | 2026
| Mina the Hollower
| Two tracks
|}