Japan does not mess around when it comes to ice cream. Visit a 7-11 or other konbini (impeccably tended convenience store) to sample the wide range of delicious, but occasionally off-key, flavors that Haagen-Dazs' Japan unit only markets here.
My all-time favorite is Foret Noire, with runners up going to Opera Special Edition and 30th Anniversary Sakura.
Haagen-Dazs introduced two "Spoon Vege" vegetable flavors this year: orange/carrot and tomato/cherry. Not sure how healthy vegetables are when you drench them in milk fat, but go for it.