According to a Football Insider report, Celtic is willing to pay big dollars to release Postecoglou from the Japanese club, before formally unveiling the Australian as its new manager.
Postecoglou's Yokohama: tactical analysis
The 55 year-old former Socceroos manager led Marinos - part of the City Group's portfolio of clubs - to the domestic title in 2019, becoming the first Australian to achieve the milestone.
He'd previously guided the Australia national team to the Asian Cup title in 2015, having amassed a decorated A-League management portfolio.
In 2019 Postecoglou turned down an opportunity to coach in Greece, a decision that may bear more fruit, with the SPFL glamour club set to announce his signing in the coming days.