The following is Open Game Content from a 3PP Source
Yumi: The asymmetrical composite longbow of the samurai, the yumi has a grip that is generally 1/3 of the way along the length of the bow, with 2/3 of the bow shaft above it. The asymmetrical nature of the bow allowed it to be used from horseback without difficulty and in fact many samurai were quite practiced at the art of mounted archery. It was also generally used from castle walls and behind portable bamboo walls used as cover.
There are four basic types of arrows used by samurai with the yumi — standard arrows, rope cutter arrow, flesh terror arrow, and humming bulb arrow. The damage and critical listed is for when the samurai is firing a standard arrow.
The stats and description of the yumi specifically refer to the daikyu (longbow) yumi. If the samurai is using a hankyu (shortbow) yumi, use the stats for a masterwork shortbow.
|Samurai Weapons||Cost||Dmg (S)||Dmg (M)||Critical||Range||Weight||Type||Special|
|Yumi||400 gp||1d6||1d8||x3||110 ft||4 lbs.||P||—|