Hotaka Yamakawa homered twice and drove in five runs while 43-year-old Tsuyoshi Wada pitched seven innings Wednesday as the Pacific League-leading SoftBank Hawks trounced the Rakuten Eagles for the second straight night, 12-0. A day after the Hawks hammered Rakuten 21-0, Yamakawa hit a three-run home run in a five-run first and a two-run shot in a four-run second at Kyocera Dome Osaka. Wada (2-0) allowed three hits and no walks over seven innings en route to his 160th career win in Japan. Yamakawa started the day tied with Yakult’s Munetaka Murakami for Nippon Professional Baseball’s home run …