I've been preparing dashi at home for quite a while now, gradually refining the variables of the way I make it and the ingredients I use — basically kombu and katsuobushi, but adjusting the quantities and timing — all with the aim of obtaining the optimum depth of flavour.
And after 30 years or so, I think I'm starting to get the hang of it. So it's time to take it one step further. Enter the new kezuri-ki...
Up to now, I've been using pre-shaved katsuobushi flakes, often buying them from vendors in the Tsukiji outer market (and freezing what I don't need immediately to preserve their goodness). But preparing your own is a whole different ballgame. Not perhaps as radically different as, say, grating your parmesan instead of pouring powdered cheese out of a packet. But still, to use whole katsuobushi is to take the freshness and flavour to the next level.
The equipment itself is a work of modest but perfect craftsmanship: the box is made of kiri (paulownia), which is good at keeping the moisture out, so I can store the katsuobushi inside the drawer at the bottom.
And the blade was forged by a local knife-maker, who is actually descended from a line of samurai sword makers. Apparently they are happy to tune it up and keep it razor sharp for as long as they/I are/am still around.
With a blade this sharp, just the basic action of "planing" the hard, wood-like fillets is a pleasure. Besides the incomparable aroma of the fresh shavings (which are properly called kezuribushi), the interior of the katsuobushi is an amazing dark-ruby red colour.
This one comes from Yaizu in Shizuoka, which along with Kochi, is a major centre for landing skipjack and processing them into katsuobushi.
I actually had a kezuri-ki that I used for a while — this was a couple of decades back — but I got out of the habit of using it for a number of reasons. Mainly because a) it was an entry-level model and hard to adjust, whereas this one is hand-crafted; and b) I was not that committed to using it and, after the blade dulled, I let it rust and then reverted to using pre-shaved. Not this time!
In Japanese, the whole katsuobushi are known colloquially as kame (literally "turtles") or kame-bushi. As for me, I just like to call them "umami logs."
A couple of incidental thoughts:
1) This was the very best present I got last Christmas. A big big thank-you to @hanabidreaming xxx !!
2) I came across a nice concise explanation of the way a kezuri-ki works on this site...
3) And about shaving katsuobushi on this site...
4) While I'm preparing katsuobushi, I always (well, quite a lot) think of this album. It's thanks to John — and Yoko of course — that I first discovered Japanese food. Listen here...
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