Arthur Fils defeated Ugo Humbert in the final, 5–7, 7–6(8–6), 6–3 to win the singles tennis title at the 2024 Japan Open.

[1] He saved a championship point en route to his third ATP Tour title (and first on hardcourt).

Humbert was contending to become the first player in ATP Tour history to win his first seven finals.

[2] Ben Shelton was the defending champion,[3] but lost in the quarterfinals to Fils.

[4]