Fuji (不二, Peerless) was Nintendo’s budget brand of kabufuda, mekurifuda, and other karuta decks. (It was not used for hanafuda decks.)
As a budget brand, it shared the same price range as Miyako no Hana, which was Nintendo’s budget brand of hanafuda decks. It ranks below Hi no De.
It was known to be used around the 1930’s, and was discontinued quite early.
Label from a two-deck box.