Koichi Yamakawa
| Lastname: | Yamakawa |
| Firstname: | Koichi |
| Country: |
 Japan |
| Date of birth: |
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Starts
2022
#19
Subaru BRZ (ZC6)
RH2
16.
16. JAF Kyushu
16. JMRC Kyushu
6. class RH2
16. JAF Kyushu
16. JMRC Kyushu
6. class RH2
2021
#10
Subaru BRZ (ZC6)
RH2
8.
8. JMRC Kyushu
8. JAF Kyushu
4. class RH2
8. JMRC Kyushu
8. JAF Kyushu
4. class RH2
#11
Toyota GT86
RH2
11.
10. JMRC Kyushu
9. JAF Kyushu
6. class RH2
10. JMRC Kyushu
9. JAF Kyushu
6. class RH2
2020
#16
Subaru BRZ (ZC6)
RH2
27.
24. JMRC Kyushu
22. JAF Kyushu
6. class RH2
24. JMRC Kyushu
22. JAF Kyushu
6. class RH2
2019
#12
Toyota GT86
RH2
E4
E4
12.
3. TGR Joint Cup Kyushu
12. JMRC Kyushu
3. class E4
4. class RH2
3. TGR Joint Cup Kyushu
12. JMRC Kyushu
3. class E4
4. class RH2