Tora-ya Honke in Tsu City, which advertises itself as the inventor of ichigo daifuku, claims 'it did not apply for a patent because it was afraid its manufacturing method could leak out.'
元祖を名乗る津市「とらや本家」は、「製法が外部に流出するのを恐れて特許などの申請を行わなかった」と主張している。