Japan handset shipments declined -4% annually in Q3 2017. Apple declined by -13% YoY, but dominated the Japan handset market with almost 50% share. Apple's iPhone 8 / 8 Plus / 7 / 7 Plus / SE, Samsung's Galaxy Feel and Sony's Xperia XZs were among the best-selling handset models through local operators. Apple continued to capture top positions through all local Japanese operators based on the robust volume of the latest flagships. Our extensive report tracks 17 handset vendors' marketshare by quarter at all major operators in Japan, including NTT Docomo, Softbank and KDDI from Q1 2012 to Q3 2017. The report can be used by handset vendors, component makers, content developers, vehicle manufacturers and others to identify winners and losers by carrier in the high-value Japanese mobile market.