Seizo Watase (??? ???? or ?? ??, Watase Seizo) is a Japanese manga artist and illustrator born 15 February 1945 in Kobe, Hyogo Prefecture, Japan.
Outside of being an illustrator for numerous posters, books, and other works, he is most well known for his dramatic romance manga Heart Cocktail, which had sold over 5 million copies.He won the 1974 Shogakukan Big Comic Prize.
In 1987, Watase received the Bungeishunju Manga Award for his work Phillip, P.I.
(?????????, Shiritsu Tantei Firippu).In addition to various exhibits in Japan, Watase held his first major exhibit in the United States at the Japanese American Cultural and Community Center in Los Angeles, California in 1998.