Nikkei Press estimated the market share of temporary help firms (temporary staff service) in Japan in 2015. According to it, Recruit has the biggest share (7.4%). The industry-wide total sales were 5.6 trillion yen in 2015.
Figure: 2015 Market Share of Temporary Help Firms in Japan
|Firm||Market Share %|
Source is Nikkei Sangyo Shimbun newspaper, the article on 2016 July 25th.