1 Mon 'Ryuhei Eihō' - Kammu

Eiraku Tsūhō this is not. The Ryūhei Eihō was the third emission in Japan's Kōchōjūnisen series — twelve successive copper coinages issued between 708 and 958 as the imperial court attempted, largely without success, to establish a monetized economy among a population that preferred rice and cloth as exchange media. Kammu's reign saw aggressive fiscal and military expenditure, including the costly campaigns against the Emishi in northern Honshū, and the coinage was partly a mechanism for funding that ambition.

Circulation remained thin outside the capital region. By the time the series ended in the mid-tenth century, the experiment had effectively failed.