Lucky Trip Again, Solaris, Osaka, Japan, 2015
Umimachi, Zeit Foto Salon, Tokyo, Japan, 2015
Twin boat, Visuel art Gallery, Osaka, Japan, 2014
Lucky cat & Matatabi, Projektraum Fotografie, Dortmund, Germany, 2014
The Dog in France, Le 29 Librairie Photographie, Paris, France, 2014
My Favorite 21, Zen Photo Gallery Roppongi, Tokyo, 2013
I'm Full, Sorajuku,Tokyo, Athens,Osaka, 2012
Koji Onaka, Carré Amelot ,La Rochell, France, 2012
Sigeichi Nagano & Koji Onaka// Ce Qui Se Défait, Photo4 , Paris, 2011
SlowTokyo Candy Box, Le Plac'art Photo, Paris, 2010
Horse & Cactus 2, Emon Photo Gallery, Tokyo, 2010
Voayages, The Japan Foundation, Leira, Portugal, The Japan Foundation, Toluca, Mexico, 2010, The Japan Foundation ,Paris, Tokyo Metlopolitan Museum Of Photography, 2009
Daegu Photo Biennale, Culture And Art Center, Daegu Korea, 2010
Landscape Of Ashikaga, Ashikaga Art Museum, Tochigi Japan, 2010
Seitaka-Awadachiso/Nogata, Tanio Musium, Fukuoka Japan, 2009
The Manila Box, Kaida Gallery Manila Phillipin, 2009
The Dog In France, Nadar,Osaka, 2008
Horse&Cactus- In Mexico, Emon Photo Gallery, Tokyo, 2007
Dragonfly, Chukyo University Gallery C・Square, Tokyo, 2007
Japan Caught By Camera, Shanghai Museum, Shanghai, 2007
Recent Acquisitions, Tokyo Metropolitan Museum Of Photography, Tokyo, 2007
Grasshopper, Zeit Foto Salon, Tokyo, 2006
Latvia,Spain, Visual Arts Gallery, Tokyo, 2005
Takaramono/My Precious: Photos And Words Five Contenporary Japanese Photographers, Yokohama Citizens Gallery, Yokohama, 2005
Slow Boat, Photographers' Gallery, Tokyo
2003
Matatabi, Zeit Foto Salon, Tokyo, 2003
Black Out/Contemporary Japanese Photography, The Japan Foundation , Roma, Paris, Tokyo, 2002-2003
Tokyo1984-91/Reaview Mirror Part2, Photographers' Gallery, Tokyo, 2002
The18th Higasikawa Photofiesta, Higashikawa Culture Gallery, Hokkaido, 2002
Tokyo Candy Box, Place M, Tokyo, Visual Arts, Tokyo, Shinjuku Nikon Salon, Tokyo, 2001
Machikage, Studio Ebis Photo Gallery, Tokyo, 1998
Distance, Mole, Tokyo, Berg, Tokyo, 1996
Seitaka Awadachi-Sou, Ginza Nikon Salon, Tokyo, 1993, Gallery Kaido, Tokyo, 1988-91
Seitaka Awadachi-Sou No Aru Machi, Camp, Tokyo, 1983
Award
The Photographic Society Of Japan New Photographer Prize, Japan, 2006
The18th Higasikawa New Photographer Prize, Japan, 2002
The 4th Shasin-No-Kai Prize, Japan, 1992