 The title means ""Kana" practice book Treasury of the loyal retainers".The "kana practice book" aspect refers to the coincidence that the number of "rōnin" matches the number of "kana", and the play portrayed the "rōnin" as each prominently displaying one kana to identify him.The forty-seven "rōnin" were the loyal retainers of Asano; the title likened them to a warehouse full of treasure.