To extract the soup stock from katsuobushi, put shaved pieces of katsuobushi into a pot of hot water and then immediately turn off the flame; when the shaved katsuobushi sinks, strain the extract-seeped hot water.
鰹節で出汁を取る際には、削った鰹節を投入してすぐ火をとめ鰹節が沈むのを待って漉（こ）して取る。