ITF - M15 Kashiwa 04/05 01:00 27 Kim, Cheong-Eui v Jumpei Yamasaki 4-6,6-3,4-6
ITF - M15 Kashiwa 04/04 01:00 26 Issei Okamura v Jumpei Yamasaki 3-6,2-6
ITF - M15 Kashiwa 04/03 06:15 25 Jumpei Yamasaki v Nam, Ji Sung 6-3,2-6,7-6
ITF - M15 Tsukuba 03/31 02:00 29 Jumpei Yamasaki v Shintaro Imai 4-6,4-6
ITF - M15 Tsukuba 03/30 01:00 28 Veldheer, Mick v Jumpei Yamasaki 2-6,2-6
ITF - M15 Tsukuba 03/29 01:00 27 Brymer, Gage v Jumpei Yamasaki 3-6,7-6,5-7
ITF - M15 Tsukuba 03/28 01:00 26 Tanaka, Yunosuke v Jumpei Yamasaki 2-6,6-1,3-6
ITF - M15 Tsukuba 03/27 02:25 25 Jumpei Yamasaki v Masamichi Imamura 6-1,4-6,6-4
Kofu, Qualifications Simples M-ITF-JPN-03A 03/24 01:30 29 Jumpei Yamasaki v Sho Shimabukuro 7-6,6-3
Kofu, Qualifications Simples M-ITF-JPN-03A 03/23 02:55 28 Jumpei Yamasaki v Tanuma, Ryota 6-2,6-4
Kofu, Qualifications Simples M-ITF-JPN-03A 03/22 03:50 27 Yusuke Takahashi v Jumpei Yamasaki 3-6,1-6
Kofu, Qualifications Simples M-ITF-JPN-03A 03/21 04:10 26 Jumpei Yamasaki v Song, Min-Kyu 7-5,6-1
Kofu, Qualifications Simples M-ITF-JPN-03A 03/19 01:00 25 Keisuke Saitoh v Jumpei Yamasaki 2-6,3-6
ITF - M15 Nishi-Tokyo 03/14 01:00 26 Shintaro Imai v Jumpei Yamasaki 3-6,6-3,6-3
ITF - M15 Nishi-Tokyo 03/13 02:20 25 Jumpei Yamasaki v Look, Michael 6-4,2-6,6-2
Nishi-Tama, Simples M-ITF-JPN-01A 03/09 01:00 28 Jumpei Yamasaki v Nam, Ji Sung 2-6,1-6
Nishi-Tama, Simples M-ITF-JPN-01A 03/08 06:50 27 Hong, Seong Chan v Jumpei Yamasaki 6-3,6-7,2-6
Nishi-Tama, Simples M-ITF-JPN-01A 03/08 02:30 26 Kikuchi, Gengo v Jumpei Yamasaki 6-7,6-4,3-6
Nishi-Tama, Simples M-ITF-JPN-01A 03/06 02:30 25 Jumpei Yamasaki v Blake Ellis 7-5,6-4
ITF M15 Claremont 02/07 18:00 26 Brooksby, Jenson v Jumpei Yamasaki 6-2,6-1
ITF M15 Claremont 02/06 18:00 25 Boyer, Dusty H v Jumpei Yamasaki 6-4,3-6,6-7
ITF M25 Weston 01/29 18:20 25 Jumpei Yamasaki v Patrick Kypson 2-6,3-6
Palm Coast, Singles M-ITF-USA-05A 01/23 18:05 25 Spec, Matic v Jumpei Yamasaki 6-3,7-6
Hong Kong, Simples M-ITF-HKG-04A 01/04 04:20 27 Jumpei Yamasaki v Evan Furness 0-6,4-6
Hong Kong, Simples M-ITF-HKG-04A 01/03 10:10 26 Jumpei Yamasaki v Avidzba, Alen 7-5,7-6
Hong Kong, Simples M-ITF-HKG-04A 01/02 08:05 25 Zsombor Piros v Jumpei Yamasaki 6-7,5-7
Hong Kong, Simples M-ITF-HKG-04A 01/01 02:00 45 Jumpei Yamasaki v Runhao Hua 6-2,6-0
Hong Kong, Simples M-ITF-HKG-04A 12/31 02:00 45 Jumpei Yamasaki v Magalit, Peter Alester 6-2,6-1
ITF Hong Kong F3 12/26 02:00 26 Denis Yevseyev v Jumpei Yamasaki 6-3,7-5
ITF Hong Kong F3 12/25 02:00 25 Jumpei Yamasaki v Tanuma, Ryota 4-6,7-6,6-4