Mitoma has earned 31 caps for his national team, scoring nine goals. In a March friendly at London's Wembley Stadium, he netted the decisive goal in Japan's 1-0 victory over England.
"Regarding the World Cup, I'm still unsure. We will be in contact with the Japanese federation. With this injury, we really need to be patient, and we can't provide a clear timeline. He will miss our next two matches, which is unfortunate for him. He was in good form and had a significant impact on our performances," stated Brighton manager Fabian Hürzeler, as reported by AFP.
His squad, who are set to face Leeds and Manchester United in their final two Premier League fixtures, currently sit seventh in the table, a position that guarantees participation in the Conference League.
In the World Cup's Group F, the Japanese team will sequentially play against the Netherlands, Tunisia, and Sweden. The World Cup kicks off in less than a month, on June 11th.