The Japanese defender made only one first-team appearance before being loaned out in January.
Inamura, 24, joined Celtic from Albirex Niigata for around £250,000 but struggled to make an impact in Glasgow. He left for FC Tokyo six months after signing a four-year contract.
🚨Exclusive: FC Tokyo has finalized the permanent transfer of Hayato Inamura from Scottish club Celtic. An agreement has already been reached between the clubs. The transfer fee is estimated at €1.5 million. done deal 100% #稲村隼翔
— Kazu Kakiuchi (@kazubaggio) June 6, 2026
According to Japanese reports, Celtic have now struck an agreement with Tokyo to make the move permanent in a deal worth around £1.3 million.
Despite his limited first-team involvement, the club is set to make a significant profit on the defender.
Inamura, who previously expressed his frustration over the lack of opportunities at Parkhead, said: “I didn’t expect it to be so tough to get opportunities.
“I just want to play regularly and show what I can do.”
