There are many beer claiming to be non-alcoholic ... but I only see beer that truly nonalcoholic and zero carols ... Actually it is not an alcoholic beverage at all so kids can buy them (although what kind of kids like to drink beer like drink).
When you are in Japan, try it. 100% alcoholic free beers are available from SUNTORY and ASAHI ... KIRIN is also 100% alcohol free but has some calories.