Yon Tane-o Maku

The Yon Tane-o Maku, roughly translated to Four Seeds A Day, were special seeds created by the Agasha family. The seeds contained parts of all the elements, and if a person were to eat four such seeds a day they would require no other sustenance. They were sought after by all the clans, and the Crab Clan in particular would trade for them to give to their Hiruma Scouts. Way of the Dragon page 90