| 1988 |
- JunBorn in Miyazaki Prefecture as the second son of Minoru and Aiko Ohta. Diagnosed with autism accompanied by intellectual disability at the age of 2.
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| 1992 |
- Began attending Matsuzawa Art Classes. Started painting and drawing in earnest.
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| 1994 |
- AprEntered Dazaifu Nishi Junior High School.
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| 1996 |
- AugWon the Fukuoka Prefectural Board of Education Award at the “Marine World Uminonakamichi Fish Painting Contest.”
- SepHeld his first exhibition at the Daiwa Bank lobby in Fukuoka City (has held solo exhibitions every year since then).
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| 2000 |
- AprBegan attending “Kobo Maru,” a welfare workshop in Fukuoka City.
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| 2002 |
- SepTwo of his artworks were exhibited in the “Naive Painting Exhibition” curated by the Fukuoka Art Museum, alongside works by Rousseau, Picasso, Taro Okamoto, Kiyoshi Yamashita, and Rokuro Taniguchi.
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| 2012 |
- AprKosuke’s older brother, Shinsuke Ohta, decided to live and work alongside his brother through art. He established “Etodoke Tonya Kousuke,” a business promoting the sale and rental of paintings, focusing on artists with disabilities, primarily Kosuke.
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| 2013 |
- MayHeld his 17th solo exhibition, “Kosuke Ohta: The Autistic Painter Born in Fukuoka,” at Shibayama Gallery in Ginza, Tokyo.
- DecWon the Grand Prize at the Wild Bird Society of Japan’s 80th Anniversary T-shirt Design Contest.
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| 2014 |
- MayThe exhibition “Kosuke Ohta: Autistic Painter – A 22-Year Trajectory” was held at the Fukuoka Asian Art Museum, organized by Kyushu Asahi Broadcasting (KBC).
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| 2016 |
- JulHis artwork “Sunflower” was featured on the Kesho-mawashi (ceremonial apron) of sumo wrestler Amuru from the Ōnomatsu stable.
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| 2017 |
- AugDesigned the original artwork and appeared for the giant plastic bottle cap art project on FBS Fukuoka Broadcasting’s “24-Hour Television,” held at Kokura Izutsuya.
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| 2018 |
- JanA collaboration event with calligrapher Shoko Kanazawa was held at Namiki Square in Chihaya, Higashi-ku, Fukuoka City, organized by “Shogai Shien Fukuoka Oyajitai.”
- JunHeld his first curated exhibition at Seijo Sakurasaku Gallery.
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| 2019 |
- FebHeld joint collaboration exhibitions in Nishinomiya, Fukuoka, and Kanazawa with Shinnosuke Matsumoto, an autistic illustrator based in Kanazawa.
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| 2020 |
- OctOpened “Gallery Kousuke” in Dazaifu City, Fukuoka Prefecture.
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| 2021 |
- AprThe NHK documentary “Art Gave Me Freedom: The Autistic Painter and His Family” was broadcast nationwide.
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| 2022 |
- MarHeld solo exhibitions at three locations in Hokkaido (Sapporo, Hakodate, and Asahikawa).
- MarHeld a solo exhibition at “Gallery Michikusa” in Ikebukuro, Tokyo.
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| 2023 |
- SepHeld his first overseas solo exhibition at Novotel Taipei Taoyuan International Airport in Taipei, Taiwan.
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