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Kudo, who played for Japan four times in 2013, joins the A-League club on a one-year-deal.
The striker is Kashiwa Reysol’s all-time leading goalscorer with 92 goals across 263 appearances for the club.
Kudo also won a J-League title in 2011 and an Emperor's Cup in 2012.
“It has been a long-term ambition of mine to play in Australia. When the opportunity came to play for Brisbane Roar, I couldn't turn it down,” Masato said in a statement released by the club.
“I cannot wait to meet up with the squad and push for the title this season. I will give everything I have for the Club and our fans.”