1961 - Born in Tokushima Prefecture
1987 - B.F.A. in Oil Painting, Tokyo University of the Arts
1989 - M.F.A. in Oil Paintings, Techniques and Materials, Tokyo University of Arts
1990 - Research Student, Tokyo University of the Arts
1992-1997 - Studied in Nuremberg Academy of Art, Painting
1996 - 'Meisterschüler' by Prof. Günter Dollhopf, at Nuremberg Academy of Art
1998-2006 - Instructor, Oil Painting, Department of Techniques & Materials at Tokyo University of the Arts
2006-2007 - Assistant Professor, Oil Painting, Department of Techniques & Materials at Tokyo University of the Arts
2007-2011 - Associate Professor, Oil Painting, Department of Techniques & Materials at Tokyo University of the Arts

1989
Ginza Surugadai Gallery, Tokyo

1990
Ginza JBC Gallery ('90, '92, '96), Tokyo

1994
Gold/Pfeil, Nuremberg

1998
Gallery Fukuyama ('98, '00), Tokyo

1999
Fuji Gallery ('99, '00, '01, '02, '03, '04, '05, '06, '07, '08, '10) Osaka

2000
Yokohama Galeria Bellini Hill Gallery, Kanagawa

2002
Gallery Mori, Tokyo

2005
Gallery OPEN DOOR ('05, '07), Tokyo

2011
Galerie Omotesando, Tokyo

2012
The Chinretsukan Gallery, Tokyo University of the Arts, Tokyo

1987
Graduation Exhibition (B.F.A. Graduation Project "The Trout", Purchased by the University).

1989
Graduation Exhibition (M.F.A. Graduation Project "The Salmon", purchased by Daiwa Bank)

1993
Grosse Kunst Exhibition Munich, Haus der Kunst

1994
"Siebold und Japan", Siebold Foundation, Wuerzburg

1996
Dollhopf Class Exhibition, Schwabach

1997
From the Collection of the University Art Museum (Tokyo, Osaka, Kyoto, Nagoya)

1999
"At Center of Corridor" Yokohama Galeria Bellini Hill Gallery, Kanagawa "STOP OVER" Nuremberg Academy of Art, Nuremberg

2002
"NEW'S" The University Art Museum, Tokyo

2003
Art Workshop School Exhibition, Myoko Akakura Kogakuro, Niigata ('03, '04, '05, '06, '07, '08, '09, '10)

2004
Fuji Gallery and Teo Art Gallery, Japan-South Korea Exchange Exhibition, Teo Gallery, Busan
"Planaritym", Fuji Gallery, Osaka

2005
"Reflex-Development and Construction of Contemporary Methods of Gold Leaf and Tempera", The University Art Museum, Tokyo
"Coexistence in the Same Mind", Korean Craft Museum, Cheongju
Tokyo University of the Arts Faculty Exhibition, Nihonbashi Takashimaya, Tokyo ('06, '07, '08, '09)
Fuji Gallery and ZERO Group, Japan-South Korea Exchange Exhibition, Fuji Gallery, Osaka
"D/J Brand", The University Art Museum, Tokyo
National Cultural Festival in Fukui, Fukui City Art Museum, Fukui

2006
"Three Histories", PICI Gallery, Seoul
"The Legend of Minakami", Minakami Mizu Kiko Kan, Gunma
Japan-South Korea Exchange Exhibition, Changwon Gallery, Changwon

2007
Artist's Oil Color, The University Art Museum, Tokyo
Japan-South Korea Exchange Exhibition, The Museum of Kyoto, Kyoto
"The Artists in Connection with Myoko", Myoko City Community Center, Niigata
"Testimony of the Self-Portraits", The University Art Museum, Tokyo
"Japanese Art <NOW>", Nohonbashi Mitsukosi, Tokyo
"Geidai Tea Ceremony; Creative Tea Room", The University Art Museum, Tokyo
"The Circle of Beauty", Nitten Building, Tokyo

2009
"Layer/inner-sight", Galerie Omotesando, Tokyo
"Hiroshi Onishi + Ippei Nakajima + Yoko Nagano", Fuji Gallery Osaka
"Views of IKAI", The University Art Museum, Tokyo
"The Drawings for "View of IKA", Geidai Art Plaza, Tokyo
"Galerie Omotesando + MUSEE F; The 10th Anniversary Exhibition", Galerie Omotesando and MUSEEF, Tokyo
"Asian Contemporary Art Drawing Exhibition", The University Art Museum, Tokyo

2010
"ITSU-Japanese Paintings beyond Tradition", Hillside Forum, Tokyo
"SOFA", Park Avenue Armory, New York
The 620th Tea Ceremony, Chado Urasenke Chado Kaikan, Tokyo Shoen Memorial Tea Ceremony Konin Tei, Nezu Museum, Tokyo

2021
"Hiroshi Onishi. Bluescapes", ESCAPEMENT ART, Zurich

2018
„Von der Kunst ein Teehaus zu bauen“, Neues Museum Nürnberg

2016-2017
„Schnittmengen – Zeitgenössische Kunst und die Überlieferung“, Museum für Asiatische Kunst in Berlin

2015
RURIKO Galerie & Projektbüro, Lauf a.d. Peg., Germany

2014
„Seeing objects, painting objects“ Oil Painting, Department of Material and Techniques and other Artists’, The University Art Museum, Tokyo
RURIKO Galerie & Projektbüro, Lauf a.d. Peg., Germany

2013
Ceramic Class of Prof. Makoto Toyofuku, The University Art Museum, Tokyo

2012
View of Remembrance, Tokyo University of the Arts Geidai

2011
SIX Esprits – from West, Gallery EM, Nagasaki
„Tradition • Present • Break up“ painting exhibition, The University Art Museum, Tokyo
„Homage to Akihiko Takami“, Galerie Omotesando, Tokyo

Geidai University Art Museum in Tokyo
Daiwa Bank
Museum of East Asian Art in Berlin
Private collectors