Nikkei press reported 2015 women's underwear market share in Japan. According to it, the top supplier was Kyoto-based Wacoal (41%).
Figure: 2015 Women's Underwear Market Share in Japan

| Manufacturer | Market share (%) | 
| Wacoal | 41.0 | 
| Triumph | 13.0 | 
| Gunze | 3.9 | 
| Charle | 3.1 | 
| Cecile | 3.0 | 
| Others | 36.0 | 
Source is Nikkei Sangyo Shimbun newspaper, the article on 2016 July 25th.
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