Sanada was born in Shizuoka on March 6, 1968. After graduating from Juntendo University, he joined All Nippon Airways in 1990. He played as regular goalkeeper from first season. In 1992, he moved to new club Shimizu S-Pulse based in his local. Although he played in all matches in 1992, he battles with Sidmar for the position from 1993. After Sidmar retired end of the 1995 season, Sanada became completely regular goalkeeper. The club won the champion in the 1996 J.League Cup which is first major title in the club history. In 1999, the club won the 2nd place in J1 League. He was also selected Best Eleven. In Asia, the club won the champions 1999–2000 Asian Cup Winners' Cup which is their first Asian champions. From 2001, his opportunity to play decreased behind young goalkeepers Keisuke Hada and Takaya Kurokawa. He retired end of the 2004 season.