Ichiko Hashimoto (橋本一子) is a Japanese pianist, singer and composer whose career does not sit inside one genre, and a profile that treated her only as a jazz pianist would leave out most of what she has released. The jazz thread is real and it surfaces at intervals: the four-pianist concert LP Twilight Monologues in 1984 alongside Aki Takase, Masahiko Satoh and Takashi Kako; the keyboard chair in Kazumi Watanabe's Mobo band; two Miles Davis tribute piano-trio albums in 1999 and 2001; and the Ub-X trio from 2006. Around it sit new wave, ambient and Japanese-language pop records, bossa nova, and a large body of film, game and anime scoring, including RahXephon and Code Geass. Her own label's profile heads her name with "Improviser, Composer, SongWriter, Arranger" and describes the music as non-genre. Japanese Wikipedia says she came to be recognised as a jazz pianist while noting that several of her albums sit well away from jazz, and that is the fair way to read the catalogue.

She was born on 1 July 1952 in Kobe, left the city as a child, lived in Kumamoto and then settled in Tokyo. She began piano at five, attended Tokyo Metropolitan Ueno High School, and graduated from the piano department of Musashino Academia Musicae in 1975, having started performing while still a student. Her earliest credit on Discogs is from 1978: Sketch of My Life by the Yoshio Ikeda Quintet (Seven Seas), on which she is credited with vocals and piano next to Aki Takase on piano, Motohiko Hino on drums and Suetoshi Shimizu on saxophones.

In the spring of 1980 she joined the support band on Yellow Magic Orchestra's first domestic tour, Technopolis 2000-20, which ran from 21 March to 15 April; Japanese Wikipedia says she stood in for Akiko Yano, who was away on maternity leave. Discogs credits her on keyboards on TV-YMO (Alfa, 1993), a collection of the group's television appearances, alongside Ryuichi Sakamoto and Yano. In 1981 she and the multi-instrumentalist Atsuo Fujimoto released Colored Music as the duo Colored Music, an electronic new wave record that the club and reissue scene has since taken up again; it was reissued on CD in 2008 and again in 2018, the year the duo released a second album, Individual Beauty. Fujimoto has been her closest collaborator ever since, on drums, bass and guitar. Over the same months she was a keyboardist in Akira Sakata's Sakata Orchestra, credited on fortepiano on 4 O'Clock (Better Days, August 1981), where Kazutoki Umezu and the trombonist Shigeharu Mukai are in the band, and on piano and vocals on Berlin 28 (Better Days, 1982), recorded live at the Berlin Philharmonie on 6 November 1981 with Shuichi Ponta Murakami among the drummers.

The mid-1980s are where the jazz and non-jazz lines first cross. In 1984 she released Ichiko on JVC's Music Interior series, a record of solo piano and synthesizer-and-voice pieces that Discogs files under ambient and modern classical. The same year Lunatic Records issued Twilight Monologues, a live split LP of four pianists, Satoh, Takase, Hashimoto and Kako, recorded at Yamaha Hall in Hiroshima across four dates between 17 June and 22 July 1984. It has four tracks, one on each date, and Discogs does not say which is hers. She also played piano, keyboards and voice on Kazumi Watanabe's Mobo Club (1984), keyboards and vocals on Mobo Live (1985), and vocals on Mobo Splash (1985), the album with American saxophonists as guests; Umezu played on the last two, Sakata was a guest on Mobo Club and Mobo Live, and Murakami was on drums throughout. Watanabe produced her own Beauty (Domo, 1985), which Discogs tags as new wave and ambient, and she appears on piano, keyboards and vocals on Atsuo Fujimoto's Beat Jazz LP (Better Days, 1986) and on Umezu's Diva project (1988).

Her Polydor albums of 1986 to 1990 mix directions without settling on one. Vivant (1986), High Excentrique (1988) and D.M. (1989) are new wave and pop; Mood Music (1987) is an album of jazz and bossa nova standards, among them "The Girl from Ipanema," "Night and Day," "Moanin'" and "April in Paris"; and High Excentrique Piano Music (1989) is a live concert of Debussy and Messiaen recorded at Aoyama Round Theatre on 27 February 1989. The 1990s continued in the same way: the game score for Loom (1991), Japanese-language pop on Romantic Rain (1992), and the bossa nova album Under Water (1994), which includes Jobim's "Aguas de Marco" and which JazzTokyo later described as her guitar-and-vocal bossa record. In February 1994 she was recorded live at the New York jazz club Sweet Basil, on keyboards and voice, with the bassist Kiyoto Fujiwara's group, which included Thomas Chapin on alto saxophone and Peter Madsen on piano; the recording was released in Japan in 1999 as Live at Sweet Basil NYC.

The jazz records proper begin in 1998, when she formed a piano trio with Fujimoto and the bassist Nobuyoshi Ino. Miles Away, recorded at GOK Sound on 14 and 15 August 1999 and issued on 25 November by Tokuma Japan's ONOFF imprint, is a trio album of Miles Davis-associated repertoire: "Milestones," "Blue in Green," "E.S.P.," "Freedom Jazz Dance," "Giant Steps," "Nefertiti" and others, closing with a vocal title track. Miles Blend, recorded on 19 and 20 December 2000 and released on 25 April 2001, repeats the formula with "All Blues," "Sorcerer," "Pinocchio" and "Fall" and adds three Hashimoto originals, "Aroma," "Edge of Circle" and "Depth." Her label's profile calls it her second jazz album after Miles Away. Between them, in 2000, she released Phantasmagoria, an electronic and string-quartet record that has nothing to do with either.

In 2002 she scored the television anime RahXephon and also voiced a character in it, Maya Kamina, repeating both roles for the 2003 film RahXephon: Pluralitas Concentio; the three television soundtrack albums and the film soundtrack are the releases she is best known for outside Japan. She was music director for the dance opera UZME at the 2005 Aichi Expo, and the trio's next move came in 2006, when the group was renamed Ub-X and released Ub-X on EWE Records on 22 March. All eleven pieces are Hashimoto compositions, with Ino on bass and Fujimoto on drums. Her label's profile says it topped the J-jazz charts at both Tower Records and HMV and that a German tour followed in May 2006. Vega (EWE, 18 April 2007) added Brazilian material, "Mais Que Nada" and "The Girl from Ipanema," to a set of originals, and Japanese Wikipedia records a joint live appearance with Naruyoshi Kikuchi in 2007. In 2009 she founded her own label, najanaja, whose first releases included Arc'd-X, a record of electronic jazz and bossa made with the programmer AQ Ishii.

The later work keeps both strands going. She scored the Code Geass: Akito the Exiled films, with soundtrack albums released in 2013 and 2016, and in 2016 recorded Duo, a bossa nova album with the guitarist and singer Yoshiro Nakamura; Kenny Inaoka reviewed their 24 March 2017 concert at Motion Blue Yokohama for JazzTokyo. view (najanaja, 21 July 2021) was her first solo album in twelve years and a return to jazz standards, with "All the Things You Are," "Giant Steps," "My Foolish Heart," "Blackbird," "Beijo Partido" and "Danny Boy" beside originals; the label's notes name Kikuchi on alto saxophone, Shinpei Ruike on trumpet and Fujimoto on drums. Ub-X was still playing in 2025, including a live-recording evening at Dogenzaka Classics in Tokyo on 11 October 2025. She turned 74 in July 2026.

Hashimoto is a borderline case for a jazz catalogue, and the plain description is that she is a pianist-composer who has a jazz career inside a wider one. The jazz-tagged records on Discogs cluster from 1998 onward, with Mood Music and the 1984 Twilight Monologues as earlier exceptions; the 1980s and 1990s are mostly new wave, ambient, pop and bossa nova, and the soundtrack work (Hakuchi, RahXephon, Code Geass, Loom) is a body of its own. The jazz identity is documented, though: Japanese Wikipedia and Last.fm describe her as a jazz pianist, the Jazz Shiryokan musician database lists her, and she plays regularly at jazz rooms such as Dolphy in Yokohama.

As a trio pianist she works from the Miles Davis repertoire on Miles Away and Miles Blend, choosing the modal and post-bop end of it: Wayne Shorter's "E.S.P.," "Nefertiti," "Pinocchio" and "Fall," Herbie Hancock's "Sorcerer," and the standards Davis recorded, such as "Green Dolphin Street" and "Stella by Starlight." The jazz sits at its most original on the two Ub-X albums, where the trio plays her own compositions (all eleven on Ub-X, seven of nine on Vega) and brings in bossa nova on the second. Her voice is part of that sound and she describes it as a "voice instrument" rather than conventional singing.

Outside the trio she moves between registers on purpose. The 1980s records come out of new wave and synthesizer pop, the 1990s bossa and piano records borrow from Jobim and João Gilberto, and the soundtracks use orchestral and electronic writing; Arc'd-X (2009) folds jazz harmony into breakbeat production. Her own list of collaborators, on her English-language profile, runs from jazz (Yosuke Yamashita, Aki Takase, Kazumi Watanabe, Irene Schweizer, Han Bennink) to contemporary classical (Yuji Takahashi, Aki Takahashi) and electronic music (YMO, DJ Cloud).