| Event Date Series |  Remarks |
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| 1998/3/1 Motegi Road Race Round 1 | 2 wheels | |
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GP125 | Qualifying | Finals | |
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| GP250 | Qualifying | Finals | |
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| NK4/SP250 | Qualifying | Finals | |
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| 1998/5/24 Motegi Road Race Round 2 | 2 wheels | |
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| GP125 | Qualifying Group A | Qualifying Group B | Overall Qualifying Final Heat 1 | Final Heat 2 | Overall Final |
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| GP250 | Qualifying | Finals | |
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| SP250/NK400 | Qualifying | Finals | |
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| 1998/7/5 Motegi Road Race Round 3 | 2 wheels | |
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| GP125 | Qualifying | Finals | |
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| GP250 | Qualifying | Finals | |
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| SP250/SP400 | Qualifying | Finals | |
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| ST250/NSR150 | Qualifying | Finals | |
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| November 8, 1998 Motegi Road Race Round 4 | 2 wheels | |
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| GP125 | Qualifying | Finals | |
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| GP250 | Qualifying | Finals | |
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| SP250 | Qualifying | Finals | |
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| SP400 | Qualifying | Finals | |
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| ST250/NSR150 | Qualifying | Finals | |
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| 1998/11/29 Motegi Road Race Round 5 | 2 wheels | |
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| GP125 | Qualifying | Finals | |
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| GP250 | Qualifying | Finals | |
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| SP250 | Qualifying | Finals | |
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| SP400/NK4 | Qualifying | Finals | |
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| ST250/NSR150 | Qualifying | Finals | |
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