Etymology and distribution of 鰹屋.

Katsuya 【鰹屋】^{レベル2
About 20}  The Japanese surnames etymology dictionary.

Oosaka-fu , Fukuoka-ken . Thing . From a ladle made with Karat gold which is another name of bronze. Oosaka-fu Izumisano-shi tells that the shipper of Sato's surname in Edo era gold and silver was scooped with a cashier's scoop and he called it a shaku shop. 佐藤 Satou reference.