Pool B of the First Round of the 2017 World Baseball Classic was held at Tokyo Dome, Tokyo, Japan from March 7 to 10, 2017, between Australia, China, Cuba and Japan. Pool B was a round-robin tournament. Each team played the other three teams once, with the top two teams advancing to Pool E.
Two-time champions Japan concluded Pool B with a 3âÂÂ0 record, whereas China lost all three games after their poor performances and must now qualify for the 2021 World Baseball Classic. Cuba defeated Australia to advance to the second round.
<onlyinclude></onlyinclude> Pool B MVP: Yoshitomo Tsutsugoh