*Club domestic league appearances and goals, correct as of 22:24, 25 January 2025 (UTC) ‡ National team caps and goals, correct as of 19:15, 15 November 2024 (UTC)
In 2018, Morita joined Kawasaki Frontale. On 10 February, he made his professional debut as a substitute in the Japanese Super Cup against Cerezo Osaka. On 14 April, he made his first start in the league match against Vegalta Sendai.[3] After that, he managed to secure an active role in the team, and they would go on to win the J1 League title in 2018. In 2020, he was selected in the J-League Best Eleven,[4] along with eight other Kawasaki players as they would win the J1 League title again.
Santa Clara
On 8 January 2021, it was announced that Morita would sign for Portuguese club CD Santa Clara, in the Primeira Liga.[5] When he made his debut on 25 January, he netted his first goal for the club, scoring the winner in the 89th minute of a 2–1 victory over Rio Ave.[6]
Sporting CP
On 1 July 2022, it was announced that he would join Sporting CP on a permanent transfer.[7] He would go on to make his debut for the club against SC Braga on 7 August.[8] On 7 September, he made his Champions League debut against Eintracht Frankfurt.[9] On 30 September, he scored his first goal for the club in a win against Gil Vicente.[10]
International career
On 2 September 2018, Ryota Oshima and Hotaru Yamaguchi withdrew from the national team due to injury; Morita was called up to the Japan national team in their place for the first time in his first year as a professional.[11] He made his national team debut on 11 September, coming on against Costa Rica, the first game under new coach Hajime Moriyasu.
In January 2019, he was called up to the Japan national team for the AFC Asian Cup 2019 but withdrew due to injury.[12]
In March 2021, he was called up to the national team for the first time in just under two years, and on 30 March, he scored his first goal for the national team in a 14–0 win against Mongolia in the 2022 FIFA World Cup Asian Qualifiers.[13]