Jomai originally means the annual rice tax from Edo bakufu directly controlled land (so-called 'tenryo'), but later, it means the rice stocked by the bakufu or fudai daimyo domain (a domain of a daimyo in hereditary vassal to the Tokugawa family) as provisions of rice for the army.
城米（じょうまい）とは、本来は江戸幕府直轄地（いわゆる「天領」）からの年貢米を指すが、後に兵糧米のために幕府・譜代大名藩などに備蓄された米のことを指した。