http://www.mobileindustry.biz/article.php?article_id=1775

According to Ministry of Internal Affairs of Communication state that the mobile industry has grown to 722.4 billion Yen (4.9 billion Euro) over the past 12 months – a rise of 39 per cent. The increase was boosted by mobile content sales, which rose by 21 per cent to reach 315 billion Yen (2.1 billion Euro). Sales of ringtones accounted for 161 billion Yen (1.09 billion Euro).