Liquor and a cigarette cannot buy less than 20 years old.
The person who sold liquor and a cigarette is arrested.
The salesclerk of the convenience store which sold a cigarette was really arrested.
未成年へのタバコ、酒類の販売
There is law which forbids drinking of minority in Japan.
窶督「ツ青ャ窶扼ナステ塚?ケナステー窶ケテ滅ス~窶邸
http://www.houko.com/00/01/T11/020.HTM