 Japan: Matsuyama - Singles - Main |
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| 1/16-finals | Katayama S. | Atmane T. | 0:2 (1:6, 2:6) | details | 04.11.2024 |
| Japan: M15 Tokyo 2 - Singles - Main |
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| Quarter-finals | Katayama S. | Imai S. | 0:2 (4:6, 2:6) | details | 12.07.2024 |
| 1/8-finals | Takahashi Y. | Katayama S. | WO. | details | 11.07.2024 |
| 1/16-finals | Katayama S. | Hazawa S. | 2:0 (6:3, 6:3) | details | 10.07.2024 |
| Japan: M15 Yanagawa 2 - Singles - Main |
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| 1/8-finals | Katayama S. | Hara Friend J. D. | 0:2 (3:6, 5:7) | details | 28.12.2023 |
| 1/16-finals | Shiraishi H. | Katayama S. | 0:1 RET. (3:6, 0:2) | details | 27.12.2023 |
| Japan: Matsuyama - Singles - Main |
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| 1/16-finals | Katayama S. | Blancaneaux G. | 0:2 (0:6, 4:6) | details | 07.11.2023 |
| Japan: Matsuyama - Singles - Main |
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| 1/16-finals | Hsu Y. H. | Katayama S. | 2:0 (7:5, 6:4) | details | 08.11.2022 |
| Japan: Toyota - Singles - Main |
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| Quarter-finals | Katayama S. | Kravchuk K. | 0:2 (2:6, 64:7) | details | 27.11.2015 |
| 1/8-finals | Jones G. | Katayama S. | 0:2 (5:7, 65:7) | details | 25.11.2015 |
| 1/16-finals | Van Peperzeel G. | Katayama S. | 0:2 (4:6, 2:6) | details | 23.11.2015 |
| Japan: Matsuyama - Doubles - Main |
|---|
| Quarter-finals | Katayama S./Uchida K. | Watanabe S./Takeru Y. | 0:2 (0:6, 3:6) | details | 07.11.2024 |
| 1/8-finals | Stevenson D./Willis M. | Katayama S./Uchida K. | 1:2 (6:2, 2:6, 8:10) | details | 05.11.2024 |
| Japan: M15 Yanagawa City - Doubles - Main |
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| Final | Katayama S./Kono Y. | Kawachi K./Matsuda K. | 2:0 (6:4, 6:2) | details | 01.11.2024 |
| Semi-finals | Honda N./Tomida Y. | Katayama S./Kono Y. | 0:2 (0:6, 1:6) | details | 31.10.2024 |
| Quarter-finals | Katayama S./Kono Y. | Kikuchi Y./Noguchi M. | 2:0 (6:4, 7:63) | details | 31.10.2024 |
| 1/8-finals | Katayama S./Kono Y. | Okamura I./Suzuki K. | 2:0 (6:2, 7:5) | details | 30.10.2024 |
| Japan: M25 Sapporo - Doubles - Main |
|---|
| Final | Kawahashi Y./Taguchi R. | Katayama S./Kusuhara Y. | 0:2 (5:7, 1:6) | details | 08.09.2024 |
| Semi-finals | Katayama S./Kusuhara Y. | Ogura K./Thompkins J. | 2:1 (613:7, 7:5, 10:7) | details | 07.09.2024 |
| Quarter-finals | Katayama K./Yoshimura D. | Katayama S./Kusuhara Y. | 0:2 (4:6, 4:6) | details | 06.09.2024 |
| 1/8-finals | Matsuda R./Shiraishi H. | Katayama S./Kusuhara Y. | 0:2 (64:7, 1:6) | details | 05.09.2024 |
| Japan: M15 Tokyo 2 - Doubles - Main |
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| Quarter-finals | Ito T./Katayama S. | Hazawa S./Ichikawa T. | 1:2 (7:67, 2:6, 7:10) | details | 11.07.2024 |
| 1/8-finals | Barki N. A./Rungkat C. | Ito T./Katayama S. | 0:2 (1:6, 4:6) | details | 10.07.2024 |
| Japan: M15 Tokyo - Doubles - Main |
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| Final | Katayama S./Kono Y. | Kusuhara Y./Nakagawa S. | 0:2 (4:6, 66:7) | details | 06.07.2024 |
| Semi-finals | Katayama S./Kono Y. | Isomura K./Miyoshi K. | 2:0 (7:64, 6:1) | details | 05.07.2024 |
| Quarter-finals | Lee J. M./Song M.-K. | Katayama S./Kono Y. | 0:2 (63:7, 3:6) | details | 04.07.2024 |
| 1/8-finals | Shimomura R./Takagi T. | Katayama S./Kono Y. | 0:2 (3:6, 4:6) | details | 02.07.2024 |
| Japan: M15 Kashiwa - Doubles - Main |
|---|
| 1/8-finals | Ito T./Katayama S. | Kawachi K./Tokuda R. | 1:2 (3:6, 7:5, 6:10) | details | 02.04.2024 |
| Japan: M15 Yanagawa 2 - Doubles - Main |
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| Final | Katayama S./Nakagawa S. | Kawachi K./Sueoka Y. | 2:0 (6:2, 6:3) | details | 30.12.2023 |
| Semi-finals | Ichikawa T./Kono Y. | Katayama S./Nakagawa S. | 0:2 (63:7, 2:6) | details | 29.12.2023 |
| Quarter-finals | Saitoh K./Yamanaka T. | Katayama S./Nakagawa S. | 0:2 (1:6, 1:6) | details | 28.12.2023 |
| 1/8-finals | Katayama S./Nakagawa S. | Liu S./Zhang C. | 2:0 (6:0, 6:3) | details | 26.12.2023 |
| Japan: M15 Yanagawa - Doubles - Main |
|---|
| Quarter-finals | Isomura K./Sueoka Y. | Katayama S./Watanabe S. | 2:1 (2:6, 7:5, 14:12) | details | 23.12.2023 |
| 1/8-finals | Noguchi M./Yoshimura D. | Katayama S./Watanabe S. | 0:2 (1:6, 4:6) | details | 23.12.2023 |
| Japan: Matsuyama - Doubles - Main |
|---|
| 1/8-finals | Katayama S./Takeru Y. | Ho R./Romios M. C. | 0:2 (5:7, 3:6) | details | 08.11.2023 |
| Japan: M25 Sapporo - Doubles - Main |
|---|
| Final | Katayama S./Takeru Y. | Huang C. C./Kikuchi Y. | 2:0 (6:4, 6:4) | details | 09.09.2023 |
| Japan: M15 Karuizawa - Doubles - Main |
|---|
| 1/8-finals | Katayama S./Okamura I. | Han Seon Yong/Shin S. | 0:2 (2:6, 4:6) | details | 01.06.2023 |
| Japan: M25 Kashiwa - Doubles - Main |
|---|
| Semi-finals | Hsu Y. H./Huang T. | Katayama S./Takeru Y. | 2:0 (7:5, 6:4) | details | 07.04.2023 |
| Quarter-finals | Katayama S./Takeru Y. | Hazawa S./Shimizu Y. | 2:0 (6:0, 6:3) | details | 06.04.2023 |
| 1/8-finals | Kawachi K./Lee J. M. | Katayama S./Takeru Y. | 1:2 (7:5, 3:6, 4:10) | details | 04.04.2023 |
| Japan: Matsuyama - Doubles - Main |
|---|
| Semi-finals | Katayama S./Takeru Y. | Harris A./Smith J. P. | 0:2 (4:6, 4:6) | details | 11.11.2022 |
| Quarter-finals | Mochizuki S./Noguchi R. | Katayama S./Takeru Y. | WO. | details | 10.11.2022 |
| Japan: Toyota - Doubles - Main |
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| 1/8-finals | Katayama S./Onozawa A. | Kwon S./Lim Y-K. | 1:2 (6:4, 2:6, 5:10) | details | 14.11.2016 |
| Japan: Kyoto - Doubles - Main |
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| Quarter-finals | Bega A./Janvier M. | Ehara H./Katayama S. | 2:1 (5:7, 6:2, 10:7) | details | 25.02.2016 |
| 1/8-finals | Ehara H./Katayama S. | Bai Y./Chen T. | 2:1 (6:4, 2:6, 10:8) | details | 24.02.2016 |
| Japan: Toyota - Doubles - Main |
|---|
| 1/8-finals | Klein B./Reid M. | Katayama S./Kondo H. | 2:1 (5:7, 6:3, 10:6) | details | 23.11.2015 |