Tomomi Miyamoto and Mio Otani both scored twice as Japan's women made a perfect start to their Athens Olympic Asian zone qualifying campaign with a 7-0 thrashing of Vietnam in Group C on Sunday.
Gunning for their first Olympic appearance since the 1996 Games in Atlanta, Japan took the lead when Otani set up Miyamoto to score after three minutes at Komazawa Stadium in Tokyo.
Otani doubled the lead four minutes later and Miyamoto completed her brace in the 41st minute to put the game out of reach.
Otani weighed in with her second in the 59th minute, and substitute Karina Maruyama and Emi Yamamoto also found the target before star striker Homare Sawa wrapped up the scoring in the dying stages.