On 8 March 2019, it was announced that Wakatsuki would join the team as a specially designated player for the 2019 season.
It was also announced that he would join the senior team permanently in the 2020 season.
[6] On 28 December 2021, it was announced that his loan would be expiring and he would be returning to Shonan.
[11] In October 2019, Wakatsuki was called up to the 2019 FIFA U-17 World Cup.
[12] He scored a brace in the opening group stage match against Netherlands U17s on 28 October 2019.