Nikkei newspaper group estimated the 2016 convenience store market share in Japan. According to it, 7-Eleven is the largest chain in Japan.
Figure : Convenience Store Market Share in Japan, 2016

| Chain | Market share (%) |
| 7-Eleven | 40.4 |
| Familymart | 26.9 |
| Lawson | 21.9 |
| Ministop | 3.0 |
| Yamazaki | 1.7 |
| Others | 6.1 |
Source is Nikkei Sangyo Shimbun newspaper, the article on 2017 July 24th.
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