without any weak spot; watertight (e.g. reasoning); impeccable
(not even) a bit of; (not even) a hint of; (not) an iota of
without any weak spot; watertight (e.g. reasoning); impeccable
ichibugin; Edo-period rectangular silver coin worth one quarter ryō
ichibukin; Edo-period rectangular gold coin worth a quarter ryō
ichibuban; Edo-period rectangular coin (usu. gold) worth a quarter ryō