While this is a straight forward favorite, probably world-wide, two small things do strike me as worthy of mention. Although brownies are available if you look hard enough, many if not most Japanese need to have the exact nature of a brownie explained to them. Not a cookie, not a cake, a brownie. Also, there is no basic chocolate ice cream available from Haagen Dazs. Plain vanilla is fine, but chocolate requires further categorization. ハーゲンダッツ
Photo is a web capture for explanatory purposes, copyright belongs to the company.