Nikkei press reported 2015 tissue and toilet paper market share in Japan. According to it, the top supplier was Daio Paper (15%).
Figure: 2015 Tissue and Toilet Paper Market Share in Japan
|Manufacturer||Market share (%)|
|Tokushu Tokai Paper||1.5|
|Kitakami HiTec Paper||0.4|
Source is Nikkei Sangyo Shimbun newspaper, the article on 2016 July 25th.