In the era of samurai (warriors), umeboshi became indispensable not only as preserved food but also for the sterilization of wounds and the prevention of food poisoning and contagious diseases on the battlefield.
武士の時代になると梅干しは保存食としてだけではなく、傷の消毒や戦場での食中毒、伝染病の予防になくてはならないものとなった。