Derivation3

In those days, over 100 lower-classed samurai worked as craftsmen and immersed themselves in making Mage Wappa for daily use.
In particular, lunch boxes were made in all shapes and sizes to benefit the business style, such as a large round shaped one for farmers, a small koban-shaped (oval Japanese gold coin of the Edo period) for merchant varieties, and ones with a wood-lace for fishermen and boatmen to have a meal in a pitching boat.