Yasuo Tanaka  

Yamada, 田中 安雄

Yamada, also known as Yasuo Tanaka, is one of Nobita's classmates and a background character in the 1979 anime. He can be easily identified by his consistent wearing of a baseball cap. Along with Haruo, he frequently appears throughout the series. In the 2005 anime episode "The Horror of Gians Pizza," Yamada is shown to have a younger sister. His name translates to "Young Man A" in English credits.