Seiko Yamada is a Japanese badminton player. Together with Shizuka Yamamoto, she won the women's doubles national champion in 2000 and 2003. Yamada competed in badminton at the 2004 Summer Olympics in women's doubles with partner Shizuka Yamamoto. They were defeated by Chin Eei Hui and Wong Pei Tty of Malaysia in the round of 32. She is currently ranked #7 in Japan.