Round: 27 Ground: Hardcourt outdoor
| ITF Japan F5 MD | 2015/06/04 05:05 | Katayama S / Onozawa A v Nagao K / Oku H | 6-3,7-6 |
| ITF Japan F1 MD | 2017/03/08 04:45 | Cao/Johns v Katayama S / Onozawa A | 2-6,4-6 |
| Toyota, Japan, Doubles | 2016/11/14 03:55 | Katayama S / Onozawa A v クウォン・O・H/リム・H・C | 6-4,2-6,5-10 |
| ITF Korea F7 MD | 2016/08/31 07:35 | Katayama S / Onozawa A v Lim Y-K / Seol J-M | 3-6,6-2,10-12 |
| ITF Japan F7 MD | 2016/06/09 05:40 | Kibi Y / Niki T v Katayama S / Onozawa A | 6-4,6-7,10-8 |
| ITF Japan F6 MD | 2016/06/02 03:00 | Katayama S / Onozawa A v Han S M / Uesugi K | 6-1,6-7,9-11 |
| ITF Japan F6 MD | 2016/06/01 04:20 | Katayama S / Onozawa A v Kato S / Yoshida S | 6-3,6-2 |
| ITF Japan F5 MD | 2015/06/04 05:05 | Katayama S / Onozawa A v Nagao K / Oku H | 6-3,7-6 |
| ITF Japan F1 MD | 2017/03/07 04:25 | Hashimoto T / Tsunematsu T v Nagao K / Oku H | 2-6,6-7 |
| Challenger Kyoto MD | 2017/02/21 10:05 | ラティワタナ・SA/ワティワタナ・SO v Nagao K / Oku H | 7-5,6-3 |
| ITF Korea F8 MD | 2016/09/09 06:00 | ナム・チソン/ソン・ミンギュ v Nagao K / Oku H | 6-4,6-4 |
| ITF Korea F8 MD | 2016/09/08 06:30 | Kim Y S / Noh S-W v Nagao K / Oku H | 5-7,6-3,8-10 |
| ITF Korea F8 MD | 2016/09/07 06:00 | チョン・ボヨン/Kim v Nagao K / Oku H | 5-7,3-6 |
| ITF Korea F8 MD | 2016/09/05 07:30 | Lee H / Yoon S v Nagao K / Oku H | 6-3,3-6,5-10 |
| ITF Korea F7 MD | 2016/08/29 04:30 | チョイ・J・W/ムン・J・H v Nagao K / Oku H | 6-4,1-6,10-7 |
| ITF Japan F8 MD | 2016/06/18 05:05 | Nagao K / Oku H v イトウ,タツマ / ウエスギ,カイト | 6-4,6-2 |