Japan was responsible for $13.5 billion, or 7.9% of Apple's revenues last year. Japan was also responsible for the largest operating margin that Apple was able to produce from any country at 50.7%. For the December 2013 quarter alone, Apple generated 8.6% of its revenue from Japan, which amounted to about $5 billion. 11.6% of its operating profit came from the country during Q4.
Besides Apple, Sony also did well in Japan during February. The highly regarded Sony Xperia Z1 f, which is a version of the Sony Xperia Z1 Compact made for NTT Docomo, captured 2.3% of the market, while the Sony Xperia Z1 accounted for an additional 2%.
source: BCN (translated) via Forbes