| 26.06.17 | 1er ronda | Katsuki Nagao/Hiromasa Oku | Haru Inoue/Ryota Tanuma | 4-6, 6-3, 10-5 |  | match details | Hong Kong | Difícil |
| 26.06.17 | 1/4 | Anthony Jackie Tang/Chun Hun Wong | Katsuki Nagao/Hiromasa Oku | 6-1, 6-1 |  | match details |
| 19.06.17 | 1/2 | Tomohiro Masabayashi/Yuki Mochizuki | Katsuki Nagao/Hiromasa Oku | 6-3, 7-62 |  | match details | Hong Kong | Difícil |
| 19.06.17 | 1er ronda | Katsuki Nagao/Hiromasa Oku | Wing-Lun Lam/Ching Yeung Michael Tam | 6-2, 6-3 |  | match details |
| 19.06.17 | 1/4 | Katsuki Nagao/Hiromasa Oku | Anthony Jackie Tang/Chun Hun Wong | 3-6, 6-1, 10-7 |  | match details |
| 05.06.17 | 1/4 | Yosuke Watanuki/Yusuke Watanuki | Katsuki Nagao/Hiromasa Oku | 6-74, 6-4, 10-8 |  | match details | Japan F7 | Difícil |
| 05.06.17 | 1er ronda | Katsuki Nagao/Hiromasa Oku | Shuichi Sekiguchi/Takao Suzuki | 6-3, 6-4 |  | match details |
| 22.05.17 | 1er ronda | Katsuki Nagao/Hiromasa Oku | Jui-Chen Hung/Ching-Mou Yu | 6-4, 6-3 |  | match details | Singapore F1 | Difícil |
| 22.05.17 | 1/2 | Hiroyasu Ehara/Sho Katayama | Katsuki Nagao/Hiromasa Oku | 7-65, 6-2 |  | match details |
| 22.05.17 | 1/4 | Katsuki Nagao/Hiromasa Oku | Soichiro Moritani/Kento Takeuchi | 7-64, 1-6, 10-8 |  | match details |
| 03.04.17 | 1/4 | Katsuki Nagao/Hiromasa Oku | Ken Onoda/Masato Shiga | 6-3, 6-3 |  | match details | Japan F5 | Difícil |
| 03.04.17 | 1/2 | Katsuki Nagao/Hiromasa Oku | Kaito Uesugi/Yusuke Watanuki | 6-3, 2-6, 10-5 |  | match details |
| 03.04.17 | fin | Shintaro Imai/Takuto Niki | Katsuki Nagao/Hiromasa Oku | 6-4, 6-4 |  | match details |
| 03.04.17 | 1er ronda | Katsuki Nagao/Hiromasa Oku | Masaya Kobayashi/Sho Shimabukuro | 6-2, 7-62 |  | match details |
| 27.03.17 | 1/2 | Shintaro Imai/Kaito Uesugi | Katsuki Nagao/Hiromasa Oku | 6-1, 6-1 |  | match details | Japan F4 | Difícil |
| 27.03.17 | 1er ronda | Katsuki Nagao/Hiromasa Oku | Ken Onoda/Masato Shiga | 6-2, 6-4 |  | match details |
| 27.03.17 | 1/4 | Katsuki Nagao/Hiromasa Oku | Yusuke Takahashi/Tung-Lin Wu | 6-4, 6-74, 10-7 |  | match details |
| 20.03.17 | 1/4 | Katsuki Nagao/Hiromasa Oku | Max Purcell/Renta Tokuda | 6-4, 3-6, 10-5 |  | match details | Japan F3 | Difícil |
| 20.03.17 | 1/2 | Katsuki Nagao/Hiromasa Oku | Hiroyasu Ehara/Takuto Niki | 6-4, 6-4 |  | match details |
| 20.03.17 | fin | Katsuki Nagao/Hiromasa Oku | Yuichi Ito/Jumpei Yamasaki | 6-4, 6-74, 10-3 |  | match details |
| 20.03.17 | 1er ronda | Katsuki Nagao/Hiromasa Oku | Sho Katayama/Arata Onozawa | 6-4, 6-4 |  | match details |
| 13.03.17 | 1er ronda | Katsuki Nagao/Hiromasa Oku | Hong Chung/Jea Moon Lee | 6-2, 6-2 |  | match details | Japan F2 | Difícil |
| 13.03.17 | 1/4 | Katsuki Nagao/Hiromasa Oku | Masaya Kobayashi/Sho Shimabukuro | 6-4, 6-1 |  | match details |
| 13.03.17 | 1/2 | Takuto Niki/Kaito Uesugi | Katsuki Nagao/Hiromasa Oku | 3-6, 6-4, 10-7 |  | match details |
| 06.03.17 | 1/4 | Katsuki Nagao/Hiromasa Oku | Sho Katayama/Arata Onozawa | 6-3, 3-6, 11-9 |  | match details | Japan F1 | Difícil |
| 06.03.17 | 1/2 | Katsuki Nagao/Hiromasa Oku | Yusuke Takahashi/Renta Tokuda | 7-62, 6-1 |  | match details |
| 06.03.17 | fin | Katsuki Nagao/Hiromasa Oku | Takuto Niki/Kaito Uesugi | 6-0, 7-62 |  | match details |
| 06.03.17 | 1er ronda | Katsuki Nagao/Hiromasa Oku | Taiki Hashimoto/Takumi Tsunematsu | 6-2, 7-610 |  | match details |
| 06.06.16 | 1/4 | Yosuke Watanuki/Yusuke Watanuki | Katsuki Nagao/Hiromasa Oku | 2-6, 6-3, 10-8 |  | match details | Japan F7 | Difícil |
| 06.06.16 | 1er ronda | Katsuki Nagao/Hiromasa Oku | Ryota Kishi/Yutaro Matsuzaki | 6-3, 6-2 |  | match details |
| 23.05.16 | 1er ronda | Katsuki Nagao/Hiromasa Oku | Neeraj Elangovan/Tetsuro Habusawa | 5-7, 6-2, 10-5 |  | match details | Guam F1 | Difícil |
| 23.05.16 | 1/2 | Sho Katayama/Yutaro Matsuzaki | Katsuki Nagao/Hiromasa Oku | 6-4, 2-6, 10-8 |  | match details |
| 23.05.16 | 1/4 | Katsuki Nagao/Hiromasa Oku | Masakatsu Noguchi/Masaki Sasai | 6-2, 6-2 |  | match details |
| 09.05.16 | 1er ronda | Katsuki Nagao/Hiromasa Oku | Dennis Novak/Thomas Statzberger | 6-4, 6-3 |  | match details | Turkey F19 | Difícil |
| 09.05.16 | 1/4 | Katsuki Nagao/Hiromasa Oku | Muhammet Haylaz/Keisuke Numajiri | 6-3, 6-4 |  | match details |
| 09.05.16 | 1/2 | Katsuki Nagao/Hiromasa Oku | Sarp Agabigun/Altug Celikbilek | 2-6, 6-3, 10-6 |  | match details |
| 09.05.16 | fin | Mikelis Libietis/Hugo Nys | Katsuki Nagao/Hiromasa Oku | 4-6, 6-2, 10-3 |  | match details |
| 02.05.16 | 1er ronda | Katsuki Nagao/Hiromasa Oku | Manuel Barros/Emiliano Franco Vecchia | 6-3, 6-0 |  | match details | Turkey F18 | Difícil |
| 02.05.16 | 1/2 | Sarp Agabigun/Altug Celikbilek | Katsuki Nagao/Hiromasa Oku | 7-5, 6-3 |  | match details |
| 02.05.16 | 1/4 | Katsuki Nagao/Hiromasa Oku | Dennis Novak/Thomas Statzberger | 6-74, 6-4, 10-7 |  | match details |
| 25.04.16 | 1/4 | Katsuki Nagao/Hiromasa Oku | Raphael Baltensperger/Marko Osmakcic | 7-5, 6-0 |  | match details | Turkey F17 | Difícil |
| 25.04.16 | 1/2 | Christoph Negritu/Marc Sieber | Katsuki Nagao/Hiromasa Oku | 6-3, 7-5 |  | match details |
| 25.04.16 | 1er ronda | Katsuki Nagao/Hiromasa Oku | Daniel Kossek/Maciej Smola | 6-3, 6-1 |  | match details |
| 04.04.16 | 1er ronda | Katsuki Nagao/Hiromasa Oku | Ryota Tanuma/Ching-Mou Yu | 6-4, 7-5 |  | match details | Japan F5 | Difícil |
| 04.04.16 | 1/4 | Katsuki Nagao/Hiromasa Oku | Ryota Hisamatsu/Kazuya Tamura | 6-2, 6-1 |  | match details |
| 04.04.16 | 1/2 | Yuichi Ito/Sho Katayama | Katsuki Nagao/Hiromasa Oku | 6-3, 6-2 |  | match details |
| 28.03.16 | 1/4 | Issei Okamura/Kento Takeuchi | Katsuki Nagao/Hiromasa Oku | 4-6, 6-1, 12-10 |  | match details | Japan F4 | Difícil |
| 28.03.16 | 1er ronda | Katsuki Nagao/Hiromasa Oku | Daiki Hirota/Yuta Kawahashi | 6-0, 6-0 |  | match details |
| 21.03.16 | 1/4 | Sora Fukuda/Kaichi Uchida | Katsuki Nagao/Hiromasa Oku | 6-76, 7-5, 10-7 |  | match details | Japan F3 | Difícil |
| 21.03.16 | 1er ronda | Katsuki Nagao/Hiromasa Oku | Shuichi Sekiguchi/Karunuday Singh | 1-6, 7-64, 10-7 |  | match details |
| 14.03.16 | 1er ronda | Xin Gao/Bowen Ouyang | Katsuki Nagao/Hiromasa Oku | 7-5, 6-3 |  | match details | Japan F2 | Difícil |
| 07.03.16 | 1er ronda | Hiroki Kondo/Takuto Niki | Katsuki Nagao/Hiromasa Oku | 3-6, 6-3, 10-8 |  | match details | Japan F1 | Difícil |
| 24.08.15 | 1/4 | Katsuki Nagao/Hiromasa Oku | Jea Moon Lee/Daniel Yoo | Jea Moon Lee/Daniel Yoo - walk over |  | match details | Korea F5 | Difícil |
| 24.08.15 | 1/2 | Ji Sung Nam/Sang-Woo Noh | Katsuki Nagao/Hiromasa Oku | 6-4, 3-6, 10-3 |  | match details |
| 24.08.15 | 1er ronda | Katsuki Nagao/Hiromasa Oku | Hogi Kang/Hyeong Don Kim | 6-0, 6-1 |  | match details |
| 17.08.15 | 1er ronda | Jae-Won Choi/Ju-Hae Moon | Katsuki Nagao/Hiromasa Oku | 6-3, 6-3 |  | match details | Korea F4 | Difícil |
| 08.06.15 | 1er ronda | Yuuya Kibi/Takuto Niki | Katsuki Nagao/Hiromasa Oku | 6-4, 6-73, 10-3 |  | match details | Japan F6 | Difícil |
| 25.05.15 | 1er ronda | Katsuki Nagao/Hiromasa Oku | Joshua Cepeda/Brian Tuncap Jr | 6-0, 6-1 |  | match details | Guam F1 | Difícil |
| 25.05.15 | 1/2 | Masakatsu Noguchi/Masaki Sasai | Katsuki Nagao/Hiromasa Oku | 4-6, 6-2, 16-14 |  | match details |
| 25.05.15 | 1/4 | Katsuki Nagao/Hiromasa Oku | Chas Okamoto/Mark Oljaca | 7-64, 6-3 |  | match details |
| 27.04.15 | 1er ronda | Ken Onoda/Masato Shiga | Katsuki Nagao/Hiromasa Oku | 6-4, 6-74, 10-7 |  | match details | Thailand F2 | Difícil |
| 20.04.15 | 1er ronda | Warit Sornbutnark/Kittiphong Wachiramanowong | Katsuki Nagao/Hiromasa Oku | 7-65, 1-6, 10-7 |  | match details | Thailand F1 | Difícil |
| 30.03.15 | 1er ronda | Ryota Kobori/Yuto Sakai | Katsuki Nagao/Hiromasa Oku | 6-3, 1-6, 10-7 |  | match details | Japan F4 | Difícil |
| 23.03.15 | 1er ronda | Yuichi Ito/Chu-Huan Yi | Katsuki Nagao/Hiromasa Oku | 6-3, 6-3 |  | match details | Japan F3 | Difícil |
| 16.03.15 | 1er ronda | Katsuki Nagao/Hiromasa Oku | Chih-Jen Ho/Jui-Chen Hung | 6-3, 6-4 |  | match details | Japan F2 | Difícil |
| 16.03.15 | 1/4 | Yuichi Ito/Chu-Huan Yi | Katsuki Nagao/Hiromasa Oku | 4-6, 7-69, 10-8 |  | match details |
| 09.03.15 | 1/4 | Yuichi Ito/Arata Onozawa | Katsuki Nagao/Hiromasa Oku | 0-6, 6-2, 10-7 |  | match details | Japan F1 | Difícil |
| 09.03.15 | 1er ronda | Katsuki Nagao/Hiromasa Oku | Jarryd Chaplin/Ben Mclachlan | 6-2, 6-73, 11-9 |  | match details |