5 Fun

Ōmori was a minor han in Iwami Province (present-day Shimane Prefecture), historically significant as one of Japan's richest silver-mining districts — though by the mid-nineteenth century those mines were in serious decline. This note was issued under the han's own monetary authority, one of hundreds of such domain currencies circulating in Tokugawa Japan that could not legally be used outside their issuing domain's borders.

The extremely narrow format was common to Iwami-region hansatsu, a practical adaptation to the long, thin strips of paper traditionally produced in that part of Honshū.