Nabbout joins the J-League club after a breakthrough campaign for Newcastle Jets, scoring 10 goals in 22 appearances including an ESPN 'Goal of the Week' stunner against Western Sydney Wanderers.

"It's a bitter-sweet moment to be leaving," Nabbout said.

"We have got a great group of lads here and I'm loving my football but this is an opportunity I can't pass up, something I've worked for for such a long time."

The transfer fee is undisclosed, but reportedly "significant". 

Jets' coach Ernie Merrick had previously given Nabbout his blessing to join the club, which will further enhance his prospects of making the Socceroos' 2018 World Cup squad.

"The Red Diamonds are one of the biggest clubs in Asia," Merrick said.

"The transformation that I've seen from Andrew since arriving at the club has been nothing short of spectacular.

"He arrived at the club last season and had a strong year but he has raised the bar once again.

"I have no doubt he'll grab this opportunity with both hands."