TOKYO -- Shohei Ohtani had another RBI double, 21-year-old right-hander Roki Sasaki reached 100 mph 21 times in 66 pitches and Japan beat the Czech Republic 10-2 on Saturday night to clinch a quarterfinal berth in the World Baseball Classic.

Shugo Maki hit his second home run of the tournament and new Boston Red Sox outfielder Masataka Yoshida had three RBIs, including a go-ahead, two-run double in the third inning off losing pitcher Ondrej Satoria as the Samurai Warriors overcame a 1-0 deficit.

Ohtani went 1-for-3 with a walk before a crowd of 41,637 in the Tokyo Dome, leaving for a pinch hitter in the eighth inning. He is 5-for-10 with 3 doubles, 4 RBIs and 5 walks for Japan (3-0), which has one more group game and will host a quarterfinal on Wednesday or Thursday. He also has pitched four scoreless innings.

Sasaki struck out eight in 3⅔ innings, and got the win. He allowed an unearned run, two hits and two walks.

Sasaki threw the 16th perfect game in Japanese major league history in April, then pitched eight perfect innings in his next start before being pulled after 102 pitches. He went 9-2 with a 2.02 ERA for the Pacific League's Chiba Lotte Marines last year, striking out 173 in 129⅓ innings.

In the opener, Rixon Wingrove had four RBIs as Australia (2-0) won in a 12-2 rout of China (0-3) in a game shortened to seven innings by the 10-run mercy rule.

In Group B at Taichung, Boston's Yu Chang hit a tiebreaking, second-inning grand slam that lifted host Chinese Taipei (2-1) to a 9-5 win over the Netherlands (2-1), and Panama (2-2) won 2-0 over Italy (1-2).

Also, Puerto Rico beat Nicaragua 9-1 in Miami.