Kyogo Furuhashi bagged his 30th goal of the season Sunday as Celtic sealed their second successive Scottish Premiership title with a 2-0 win away to a 10-man Hearts.
The Glasgow club, managed by former Yokohama F Marinos boss Ange Postecoglou, wrapped up the race with four games to spare, but still has a record points total to play for.
Furuhashi opened the scoring in the 67th minute after Reo Hatate's cross found him in front of goal.
"I thought a chance would definitely come. I'm really happy to have scored the opening goal in the title-clinching game," said Furuhashi, whose tally includes a league-best 24 goals in the Premiership.
Hearts were controversially reduced to 10 men with defender Alex Cochrane's red card on the stroke of halftime, with a video review determining he denied Daizen Maeda a goal-scoring opportunity near the area.
Oh Hyeon Gyu added the visitors' second 10 minutes from the end after coming off the bench for Furuhashi, who has 50 goals for Celtic since transferring from Vissel Kobe in July 2021.
The milestone follows the disappointment of being left out of Japan's 2022 World Cup squad, which Furuhashi has turned into a source of motivation.
"A lot of things have happened, but they've all contributed to my growth," Furuhashi said. "I'm improving my mentality and technical ability little by little."
The victory secured Celtic's 10th title in 11 seasons and they can claim a domestic treble if they beat Inverness in the Scottish Cup final on June 3. They can also reach a record 107-point total by winning the remainder of their league games.