Nikkei newspaper estimated the 2013 market share of supermarket in Japan. According to it, Aeon was the biggest chain followed by Ito-yokado, Uny, Daiei and Life. The total sales of supermarkets were 19 trillion yen. The sales increased by 2.3% in comparison to 2012.
I use Life every weekday.
| Supermarket | Market share (%) |
| Aeon | 11.5 |
| Ito-yokado | 7.0 |
| Uny | 4.1 |
| Daiei | 3.5 |
| Life | 2.9 |
| Others | 71.0 |
The source of the market share is Nikkei Sangyo Shimbun newspaper, the article on 2014 July 28th.
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