NAGOYA (Kyodo) Seventeen-year-old striker Ryo Miyaichi is set to join Arsenal after catching the eye in a trial with the Premier League giants this month, Kyodo News learned Tuesday.

Sources at Miyauchi's Chukyodai Chukyo High School said Arsenal officials will be arriving in Japan in the coming days to extend a preliminary contract.

Miyaichi, who went on trial earlier this month, is expected to sign a formal contract with the Gunners after he turns 18 in December. The sources said it would likely be a four-and-a-half year deal effective Jan. 1, 2011.

The fleet-footed 180-cm forward played for Japan at the Under-17 World Cup in Nigeria last year.