Yun KōgaYun Kōga.

Risa Kimura (木村 理沙, Kimura Risa; born July 9, 1965), better known by her pen name Yun Kōga (高河 ゆん, Kōga Yun) is a Japanese manga artist. She is married to fellow manga artist Tatsuneko, from whom he took the name of Risa Yamada (山田 理沙, Yamada Risa). She is a graduate of Mita Senior High School, Tokyo.