Isesaki
Isesaki City is the "silk city." Isesaki is in Gunma Prefecture. Population is about 210,000. Isesaki is famous for "Isesaki Kasuri." Silk fabric. Isesaki residents dedicate their lives to weaving silk. Silk is "slowly" woven. Isesaki residents also live "slowly." Isesaki is about 100km from Tokyo. Many Isesaki residents work locally. For Isesaki residents, "cars" are necessary. But not "hobbies." Isesaki has no circuit. Isesaki residents live in the silk city. Not interested in motorsport.
Isesaki averages 8–31°C year-round with wet summers (16–19 rain days June–August); spring (March–May) offers the optimal track-day season at 14–24°C with lower precipitation.
10-yr monthly averages Rain days Driving season
| Track | Location | Length km | Laps | Avg Time | Avg kph | Distance km |
|---|---|---|---|---|---|---|
| Gunma Cycle Sports Center | Minakami, Japan | 1.23 | 0 | — | — | 80.2 |
| Tsukuba Circuit | Ibaraki, Japan | 2.04 | 61 | 1:02.5 | 117 | 107.9 |
| Nikko Circuit | Utsunomiya, Japan | 1.03 | 7 | 0:43.4 | 85 | 112.9 |
| Mobility Resort Motegi - Twin Ring Motegi | Motegi, Japan | 4.8 | 9 | 2:18.2 | 126 | 152.2 |
| Fuji International Speedway | Shizuoka, Japan | 4.54 | 58 | 1:56.7 | 140 | 173.2 |
| Sodegaura Forest Raceway | Chiba, Japan | 2.4 | 17 | 1:16.2 | 114 | 209.1 |
| Ebisu Circuit | Nihommatsu, Japan | 2.06 | 9 | 1:09.7 | 107 | 289 |