Kyoto Challenger 2015ChallengerCourt speedLost Q1Q121 FebMakoto OchiM. OchiMakoto OchiSets won: 2Set 1: 6Set 2: 66Set 3: 7Keita KoyamaK. KoyamaKeita KoyamaSets won: 1Set 1: 4Set 2: 78Set 3: 5
Kofu 2015FUTURESCourt speedLost Q3Q1Keita KoyamaK. KoyamaKeita KoyamaSets won: 2Set 1: 6Set 2: 7Masaki HaradaM. HaradaMasaki HaradaSets won: 0Set 1: 2Set 2: 5Q2Keita KoyamaK. KoyamaKeita KoyamaSets won: 2Set 1: 6Set 2: 6Ryota HisamatsuR. HisamatsuRyota HisamatsuSets won: 0Set 1: 3Set 2: 2Q3Ryota TanumaR. TanumaRyota TanumaSets won: 2Set 1: 6Set 2: 6Keita KoyamaK. KoyamaKeita KoyamaSets won: 0Set 1: 3Set 2: 2
Kaohsiung 2015FUTURESCourt speedLost R32R32Tsung Hua YangT. Hua YangTsung Hua YangSets won: 2Set 1: 6Set 2: 6Keita KoyamaK. KoyamaKeita KoyamaSets won: 0Set 1: 3Set 2: 3
Nishitōkyō 2015FUTURESCourt speedLost R32R32Shintaro ImaiS. ImaiShintaro ImaiSets won: 2Set 1: 6Set 2: 6Keita KoyamaK. KoyamaKeita KoyamaSets won: 0Set 1: 0Set 2: 2
Nishitama 2015FUTURESCourt speedLost R16R16Duck Hee LeeD. Hee LeeDuck Hee LeeSets won: 2Set 1: 6Set 2: 6Keita KoyamaK. KoyamaKeita KoyamaSets won: 0Set 1: 0Set 2: 2R32Keita KoyamaK. KoyamaKeita KoyamaSets won: 2Set 1: 5Set 2: 7Set 3: 6Masato ShigaM. ShigaMasato ShigaSets won: 1Set 1: 7Set 2: 5Set 3: 3