Premieres Fall 2024. Source for the teaser image is from the official Twitter account. This announcement comes as the finale for season 1 aired today. Check out the ANN article for additional information. Season 1 synopsis from AniList:
The story begins with Igarashi, who was disqualified as a pro golfer after a certain "incident" and thus moves to Kagoshima Prefecture's Tokara Islands to step out of the limelight. On these islands known as "Japan's last unexplored wilderness," he encounters a naive girl named Tonbo.
As it turns out, these supposedly unexplored islands have a homemade golf course, where Tonbo plays every day. She demonstrates genius-level prowess, playing every kind of shot with just one golf club, a 3-iron. Igarashi is amazed at Tonbo's talent, even as he harbors doubts about her only using a 3-iron. Yet, hidden deep in Tonbo's heart lies a painful, sad past….
This is so sweet of you to share my work like this, thank you! I'm also pretty excited for Season 2 of Tonbo! as it was a surprisingly touching tale emotionally, even with all the technical golf talk.