"I am glad that I can have a challenge overseas, which I have always wanted," Asano said in Hiroshima, where he currently plays for J-League side Sanfrecce Hiroshima, Jiji Press reported.
"I want to play aggressively."
Asano, 21, who is in line for the Japanese squad at the Rio Olympic Games, was rookie of the year in Japan last season and has been on two J-League title-winning teams.
Guardiola wants Arteta in 'coaching role' at Manchester City
The move to Arsenal in the English Premier League is still subject to a medical and the club are yet to reveal details of the deal.
Arsenal manager Arsene Wenger said he was looking forward to working with Asano, who he described as "a talented young striker and very much one for the future", on Arsenal's website.
Bellerin in Spain's Euro 2016 squad
Takuma signed for Sanfrecce Hiroshima aged 18 and scored 11 goals in 56 appearances for the club.
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