also: はなかつお
noun
dried bonito shavings; katsuobushi flakes
Thin, paper-like shavings of dried bonito, used as a topping or in dashi. Common in Japanese cooking.
冷奴に花鰹をたっぷりかける。
I put plenty of dried bonito shavings on chilled tofu.
お好み焼きの上に花がつおがのっている。
There are bonito flakes on top of the okonomiyaki.
鰹節 is the whole dried bonito block, while 花鰹 refers to the thin shavings.
From 花 (flower) and 鰹 (bonito), referring to the thin, petal-like shavings of dried bonito.