Prefectures
| Prefecture Name | Companies |
|---|---|
| Tokyo | 2172 |
| Osaka | 408 |
| Aichi | 186 |
| Kanagawa | 170 |
| Hyogo | 103 |
| Fukuoka | 76 |
| Kyoto | 60 |
| Saitama | 56 |
| Shizuoka | 51 |
| Chiba | 47 |
| Hiroshima | 43 |
| Hokkaido | 35 |
| Niigata | 32 |
| Nagano | 31 |
| Gifu | 26 |
| Toyama | 23 |
| Ishikawa | 23 |
| Miyagi | 20 |
| Tochigi | 20 |
| Okayama | 20 |
| Gunma | 19 |
| Mie | 16 |
| Fukui | 15 |
| Kagawa | 14 |
| Yamaguchi | 12 |
| Ehime | 12 |
| Ibaraki | 11 |
| Shiga | 11 |
| Wakayama | 11 |
| Yamanashi | 10 |
| Fukushima | 9 |
| Iwate | 6 |
| Kumamoto | 6 |
| Oita | 6 |
| Okinawa | 6 |
| Yamagata | 5 |
| Nara | 5 |
| Tokushima | 5 |
| Kochi | 5 |
| Miyazaki | 5 |
| Kagoshima | 5 |
| Aomori | 4 |
| Tottori | 4 |
| Saga | 4 |
| Shimane | 3 |
| Akita | 2 |