Noglider,
I don't sell helmets since they are available at the local bicycle store. Only mountain bike & racer riders buy them. Since our city doesn't have any highways and Jitensha bicycles are used for commuting short distances like market, groceries and schools cyclists just simply wear hats and caps. Sad to say, there isn't any city ordinance or law that requires helmet usage for bicycles. As for me and my son we use helmets during long trips when using our bicycles.