| Scale of sales (thousand ¥/month) | Number of shops | Percentage of total (%) | Cumulative percentage (%) |
| >50 | 143 | 28.0 | 28.0 |
| 50 - 100 | 165 | 32.3 | 60.3 |
| 100 - 200 | 84 | 16.4 | 76.7 |
| 200 - 300 | 23 | 4.5 | 81.2 |
| >300 | 96 | 18.8 | 100.0 |