The $500 Xbox One originally launched on November 22 in the United States, Australia, Austria, Brazil, Canada, France, Germany, Ireland, Italy, the United Kingdom, Mexico, New Zealand, and Spain. Microsoft has shipped more than 5 million systems to date.
Sony's PlayStation 4 has been available in Japan since February 22.
Historically, Microsoft's Xbox platforms have not performed very well in Japan, but that doesn't mean the company has lost hope for the region. Speaking to GameSpot earlier this year, Head of Xbox Phil Spencer maintained that console gaming is not dead in Japan.
"It's critical for us in the industry that we continue to invest there and see great games come out," he said at the time.