The Kagetsu family hail from Motoyoshi Village within the Land of Fire. The were originally ordinary herb-sellers that, though poor, lived happy lives filled with laughter. When they discovered that the herbs growing in the surrounding mountainside were valuable, the family became rich. They also became serious and laughter disappeared from their lives. Tōbei Kagetsu, the head of the clan, fakes his death in an elaborate attempt to remind his children to smile again.
The family's name means "flowers and the moon", and is also an archaism for "refined leisure" or "elegant pastime".