7‑Nov‑1983 | Taipei | Carpet | QF | 78 | 76 | Nduka Odizor [NGR] d. Michibata | 7-5 6-4 | | | | | | | | | |
7‑Nov‑1983 | Taipei | Carpet | R16 | 78 | | Michibata d. Jim Gurfein [USA] | 7-5 7-6 | | | | | | | | | |
7‑Nov‑1983 | Taipei | Carpet | R32 | 78 | 56 | Michibata d. (6)Tom Gullikson [USA] | 4-6 6-3 7-5 | | | | | | | | | |
31‑Oct‑1983 | Hong Kong | Hard | R32 | 79 | | Drew Gitlin [USA] d. Michibata | 6-0 6-2 | | | | | | | | | |
24‑Oct‑1983 | Tokyo Indoor | Carpet | QF | | 3 | (2)Jimmy Connors [USA] d. (Q)Michibata | 6-3 6-1 | | | | | | | | | |
24‑Oct‑1983 | Tokyo Indoor | Carpet | R16 | | 55 | (Q)Michibata d. Mike Bauer [USA] | 7-6 6-2 | | | | | | | | | |
24‑Oct‑1983 | Tokyo Indoor | Carpet | R32 | | 22 | (Q)Michibata d. (8)Steve Denton [USA] | 7-6 6-4 | | | | | | | | | |
17‑Oct‑1983 | Tokyo Outdoor | Hard | R64 | 100 | | Larry Stefanki [USA] d. Michibata | 3-6 6-3 6-4 | | | | | | | | | |
25‑Sep‑1983 | Maui | Hard | QF | | 82 | Brad Gilbert [USA] d. Michibata | 7-5 6-3 | | | | | | | | | |
25‑Sep‑1983 | Maui | Hard | R16 | | | Michibata d. Shozo Shiraishi [JPN] | 6-4 6-2 | | | | | | | | | |
25‑Sep‑1983 | Maui | Hard | R32 | | | Michibata d. (Q)David Pate [USA] | 7-6 6-1 | | | | | | | | | |
12‑Sep‑1983 | Dallas | Hard | R16 | | 20 | (5)Sandy Mayer [USA] d. Michibata | 6-3 5-7 6-2 | | | | | | | | | |
12‑Sep‑1983 | Dallas | Hard | R32 | | | Michibata d. Drew Gitlin [USA] | 7-5 7-5 | | | | | | | | | |
30‑Aug‑1983 | US Open | Hard | R64 | | 45 | Pat Cash [AUS] d. Michibata | 6-4 1-6 7-6 6-4 | | | | | | | | | |
30‑Aug‑1983 | US Open | Hard | R128 | | 34 | Michibata d. John Fitzgerald [AUS] | 6-4 5-7 6-7 6-1 6-4 | | | | | | | | | |
15‑Aug‑1983 | Cincinnati | Hard | R32 | | 12 | (9)Steve Denton [USA] d. (Q)Michibata | 6-7 6-4 6-2 | | | | | | | | | |
15‑Aug‑1983 | Cincinnati | Hard | R64 | | 55 | (Q)Michibata d. Mike De Palmer [USA] | 6-4 6-2 6-4 | | | | | | | | | |
8‑Aug‑1983 | Montreal / Toronto | Hard | R64 | | 61 | Marcos Hocevar [BRA] d. Michibata | 6-1 6-1 | | | | | | | | | |
6‑May‑1983 | Davis Cup AME SF: ECU vs CAN | Clay | RR | | 17 | Andres Gomez [ECU] d. Michibata | 6-2 6-4 3-6 6-2 | | | | | | | | | |
6‑May‑1983 | Davis Cup AME SF: ECU vs CAN | Clay | RR | | | Raul Antonio Viver [ECU] d. Michibata | 6-4 6-4 | | | | | | | | | |
21‑Feb‑1983 | La Quinta | Hard | R32 | | 11 | (2)Yannick Noah [FRA] d. Michibata | 6-1 6-2 | | | | | | | | | |
21‑Feb‑1983 | La Quinta | Hard | R64 | | | Michibata d. (Q)Bill Maze [USA] | 4-6 5-0 RET | | | | | | | | | |