On 28 December, Nagoya Grampus announced the signing of Kazuki Nagasawa from Urawa Red Diamonds.

[7] On 11 March, the Asian Football Confederation confirmed that Thailand would host Nagoya Grampus' group G games in the 2021 AFC Champions League.

[9] On 12 August, Nagoya Grampus announced the signing of Kim Min-tae on loan from Hokkaido Consadole Sapporo for the remainder of the season.

[10] On 9 December, Head Coach Massimo Ficcadenti left the club after his contract expired.

[11] Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.