KWIC Example. - Tatsuya Hagino; Michio Honda; Akihiko Koga; Reiji Nakajima; Etsuya Shibayama; Taiichi Yuasa (The IOTA Programming System, 1983)

Supports for Cooperative Modular Programming. - Akihiko Koga; Taiichi Yuasa (The IOTA Programming System, 1983)

On Program Transformation with Tupling Technique. - Akihiko Koga (RIMS Symposia on Software Science and Engineering, 1984)

Study on the Models of the Collaborative Learning Systems and Proposal to the Standardization Activities. - Akihiko Koga (ICME, 2001)

Experiences of Community-Dwelling Older Adults Participating in an Occupation-Focused Distance Exchange Program: A Qualitative Study. - Akihiko Koga; Kunihiko Yasuda; Shinpei Saruwatari; Hiroki Murakami; Kazuki Takeshita; Shinya Hisano (HCI (44), 2023)

Experimental Design for Participants, Not for Ethics Review. - Masayuki Ihara; Hiroko Tokunaga; Akihiko Koga; Takashi Yukihira; Masashige Motoe (HCI (6), 2025)