Hitomoji refers to Wakegi (a type of scallion or green onion). Hitomoji has been the name used for this vegetable in Kumamoto for some time now. In order to get the desired texture of the dish, the white root of the Hitomoji is lightly boiled, wrapped in fresh leaves, and seasoned in soy sauce beforehand. It is then enjoyed with either vinegared miso, or spiced miso. During the period of the 6th Hosokawa Lord of Kumamoto, as a means of restructuring the finances of the clan, laws regulating expenditures were initiated and as such this cheap, yet tasty side dish for sake was created.
(Taken from the "Kumamoto Prefecture tourism site, Nagomi Journey")