BCN Ranking published their data for the full-frame camera market in Japan from October 2017 to October 2018:
- For the time period shown, Nikon had one full-frame camera (Z7 was released in September and was still out of stock in October), Canon also had one full-frame camera (EOS R) released in October. Sony had two full-frame models released in the same time frame: Sony a7 III in April 2018 and Sony a7R III in October 2017.
- The Nikon Z6 sales were not included in the above graph.
- BCN Ranking collects real sales data from approximately 40% of the Japanese retailers.
- The new BCN graph also reflects the previous BCN full-frame mirrorless camera market share report (Sony: 67%, Canon: 22.1%, Nikon: 10.4%).
- The last global market share data I've seen can be found here.
Thanks Nakayamahanzaemon!