| Rank | Manufacturer | Model | Sensor size | Share of sales (%) |
| 1 | Olympus | E-PL3 | MFT | 10.6 |
| 2 | Sony | NEX-5N | APS-C | 10.3 |
| 3 | Canon | EOS M | APS-C | 9.2 |
| 4 | Olympus | E-PM1 | MFT | 9.1 |
| 5 | Panasonic | GF5 | MFT | 8.9 |
| 6 | Nikon | J1 | 1" sensor | 8.3 |
| 7 | Pentax Ricoh | Q | 1/2.3" sensor | 5.9 |
| 8 | Sony | NEX-F3 | APS-C | 5.4 |
| 9 | Sony | NEX-C3 | APS-C | 5.3 |
| 10 | Olympus | E-PL5 | MFT | 3.5 |
BCNranking published the top 10 best selling mirrorless interchangeable lens cameras in Japan for the period of January to September October, 2012. Some interesting points:
- Fujfilm is completely missing from the top 10 list.
- Canon is already at the #3 spot after they announced their first mirrorless camera in July, 2012.
- Nikon 1 J1 sales are better then I expected (ranked #6).
- In January 2012 sales of mirrorless camera made for 52.4% of the total cameras sold in Japan (in September 2012 this number dropped to around 45%):
BCNranking's statistics are based on actual sales numbers from stores in Japan.
