Boston Red Sox slugger Masataka Yoshida batted .480 (12-for-25) in six games from May 1-7. His 16-game hitting streak ended two days later.
Sawamura spent two weeks on the COVID-19 injured list before rejoining his team last week.
Manager Toru Oniki's club has played 12 games this season, winning 10 times and earning two draws.