BCN Ranking published their digital camera ranking for the first half of 2018:
Olympus was the #1 mirrorless camera maker in 2017 with 27.7%, but in 2018 Canon took the lead (no surprise here). The actual surprise is that in the first half of 2018, Nikon got at the #1 spot in the fixed lens camera segment with a market share of 31% (Canon is now at the #2 spot). Nikon doesn't have any interesting Coolpix offering (except the P900), while Canon continues to produce high-end compact cameras.
There is no mention of Sony or Fuji in the BCN+R article. BCN+R collects sales data from approximately 2/3 of all Japanese retail stores.
June’s BCN ranking camera sales report: the top 11 spots taken by Nikon and Canon
Source: BCN+R Via NikonRumors