A reading daily on Saturday cited an announcement by Twitter relating to its user-numbers for a country outside the US, and saying it had 35 million monthly active users in the world's third-largest economy as of the end of last year.

Facebook, on the other hand, had 25 million monthly active users in Japan at the end of 2015, a company spokesperson said.

Twitter provided the number of its users in Japan after the company's quarterly earnings fueled investors' concerns that the micro-blogging site's user growth has stalled.

Twitter last week said 320 million users signed into the platform at least once a month in the fourth quarter, the same as in the previous three months. Facebook, by comparison, had 1.59 billion monthly active users as of the end of last year, up 3 percent from the previous three months.

>> Click here to read more news on Twitter