The main draw of the Japan Open will begin on Monday 16th October, with the tournament concluding with both the singles and doubles finals taking place on Sunday 22nd October. The Japan Open is the longest-running ATP tournament in Asia, and this year the prestigious event will feature 11 of the world’s top 20 players when it begins next week.Īnd we, at Tennishead, have got everything you need to know about the ATP 500 event in Tokyo: When is the Japan Open 2023?