In earlier times rice pounded by a mortar was called 舂米 (pronounced shomai, tsukishine or tsukiyone, the first character of which is not to be confused with the similar looking character for spring '春').
古くは臼で搗いた米を舂米（しょうまい/つきしね/つきよね、「春」ではない）と呼んだ。