1933 Born in Ibaraki Prefecture, Japan
1950 First acceptance into the 35th Saiko Inten Exhibition (Restored Japan Art Institute Exhibition)
1951 First acceptance into the 7th Nitten Exhibition
1967 Received Nomination to become Inyu Ranking Member of the Japan Art Institute
1972 Met his mentor, Toshio Matsuo, and on his recommendation, entered the tutelage of Nanpu Katayama
1977 Participated in the creation of a mural at the Kodosan Hon-butsuden Temple in Kanagawa Prefecture, under the commission of Nanpu Katayama, alongside Toshio Matsuo and Mitsuei Saito.
1979 Painted a “Cloud Dragon” (Unryu-zu) on the Romon gate of Nasu Shrine in Tochigi Prefecture, under the supervision of Nanpu Katayama, together with his father, Kosei Nabatame.
1981 Advised by his mentor, Toshio Matsuo, to “paint pictures that are truly yours,” he returned to creating works of familiar flowers and landscapes based on thorough sketching.
1983 Received the Honourable Mention Award at the 38th Spring Inten Exhibition (’84, ’85 Minister for Foreign Affairs Award, ’86, ’89, ’90)
Received the Honourable Mention Award at the 68th Saiko Inten Exhibition (’85, ’87-’89)
1984 Received Nomination to become Tokutai Ranking Member of the Japan Art Institute
Received the Japan Art Institute Award (Taikan Award) at the 69th Saiko Inten Exhibition (’86, ’90)
1986 Received the 5th Japan Art Institute Scholarship Foundation Awards (Seison Maeda Award)
1990 Received Nomination to become Donin Ranking Member of the Japan Art Institute
1992 Created the cover for “NHK Hobby Encyclopedia: Tanka” (-’94)
1995 Received the Minister of Education, Culture, Sports, Science and Technology Award at the 80th Saiko Inten Exhibition
1999 Received the Prime Minister’s Award at the 84th Saiko Inten Exhibition
2000 Received the Japan Art Academy Award at the Japan Art Academy
2002 Appointed as a member of the Japan Art Academy
2005 ”Through the Four Seasons – Koichi Nabatame Nihonga Exhibition” (Nihombashi Mitsukoshi Main Store, then toured nationwide)
2006 Assumed the position of Director of the Japan Art Institute
2008 Received the Order of the Rising Sun, Gold Rays with Neck Ribbon
2015 ”Koichi Nabatame Exhibition: A Pure and Elegant Artistic Realm” (Sogo Museum of Art / Kanagawa Prefecture)
2017 ”Koichi Nabatame Nihonga Exhibition” (Nihombashi Mitsukoshi Main Store, Nagoya Sakae Mitsukoshi)
2022 ”Koichi Nabatame Exhibition: Celebrating His 88th Birthday” (Nihombashi Mitsukoshi Main Store)
2024 Received the 2024 Person of Cultural Merit commendation from the Government of Japan
Present Member of the Japan Art Academy (Nihon Geijutsuin), Donin Ranked Member and Representative Director of the Japan Arts Institute (Nihon Bijutsuin)