Yumi

A yumi is a type of bow used by samurai. When unidentified, it is a long bow. You should not bash monsters with it, or throw it—instead, wield it in your hands, then throw arrows (or fire them from your quiver).

For non-samurai, a yumi is basically the same as a regular bow. Samurai, however, get the following bonuses:
 * +1 to-hit bonus when using a yumi (in addition to their normal bow bonus)
 * +1 multishot bonus when firing ya from a yumi
 * +1 damage bonus when firing ya from a yumi