Travel guides advise tourists en route to Japan not to blow their nose or eat in public. Ice cream, however, is a notable exception that can be eaten anywhere--as well as eating on a train, where it is actually encouraged.
Now, drinking on Japanese trains is also encouraged--as long as it is wine from a can. Japan Rail East is offering the new wine in a can exclusively on limited express trains. Available in white or red, the wine comes from Monde Vineyard in Yamanashi Prefecture, Japan's small wine-producing region.