You buy it in boxes, at any station in the prefecture, and it comes wrapped piece by piece in a dark green leaf that looks like an aesthetic touch. Almost everyone unwraps it, sets it aside and never thinks about it again. It is exactly the other way round: the leaf is the part that explains the dish.

01 The problem: fish a day's walk away

Nara is one of Japan's eight landlocked prefectures. In a country where raw fish is the basis of the kitchen, that posed a serious practical problem before refrigerated transport: between the sea and the inland villages lay mountains, and crossing them took time.

The solution came from the south. In the middle of the Edo period, fishermen from Kishū — today's Wakayama — salted the summer mackerel caught in the Kumano Sea and sold it over a mountain pass to the villages along the Yoshino River. Salt was what allowed the fish to arrive at all.

The drawback was that it arrived too salty to eat as it was. What the local kitchen did was not complain about the transport but design a dish around its limitations.

02 Salt, vinegar and pressure

The assembly solves three things at once. The heavily salted mackerel is cut thin and laid on a block of vinegared rice: the rice adds bulk and acid, and the acid balances the salt in the fish. It is the same logic as any preserve, applied to a single bite.

A hand holding an opened piece of sushi on its green leaf: a thin sheet of silvery, translucent fish covering a compact block of white rice.
The piece unwrapped. The fish goes on in a thin sheet and the rice is pressed into a block: a portion designed to travel, not to be served at a counter.Kyu3a / CC BY-SA 4.0·CC BY-SA 4.0

Then the whole thing is pressed. That pressure compacts the rice, forces out the air and turns the piece into a firm block that will not fall apart in a basket or after several hours. None of this resembles counter sushi, made and eaten on the spot; this was designed from the start to last overnight.

03 Why a persimmon leaf

That leaves the part that names the dish. The persimmon leaf is not there because it looks good or adds flavour: it has antibacterial properties, and thanks to them kakinoha-zushi keeps considerably longer than ordinary sushi.

A hand holding a rectangular parcel completely wrapped in a grey-green leaf with strongly marked veins and the edges folded inward.
The piece as you buy it. The edges of the leaf fold inward and seal the mouthful: it is packaging, and it worked before packaging existed.Kyu3a / CC BY-SA 4.0·CC BY-SA 4.0

It also performs more prosaic and no less important jobs: it insulates each piece from the next, stops the edges of the rice drying out, lets you handle it without touching it with your fingers and allows a pile of identical mouthfuls to be stacked in a box without sticking together.

They did not wrap the fish in a leaf to make it pretty. They wrapped it because the alternative was not eating it.

04 How to eat it

Four things worth knowing before the first bite
  1. Do not eat the leaf
    You unwrap it and set it aside. It is packaging, not a garnish, and some people bite it by mistake thinking it is part of the mouthful.
    first thing
  2. Start with the mackerel
    It is the original version and the one that explains the dish. Salmon and other fish are later additions and considerably less salty.
    the classic
  3. Do not eat it straight away
    Unlike counter sushi, this improves with a few hours: the salt, the vinegar and the leaf need time to settle.
    counterintuitive
  4. Buy it for the train
    It is the perfect travel food and was conceived as such: eaten with your hands, it does not drip, does not smell and lasts all day in a bag.
    practical

05 What it says about a territory

It is worth pausing on what this dish reveals. Almost every Japanese coastal cuisine boasts of proximity: the day's catch, the market next door, the short journey. This kitchen does the opposite: it boasts of having solved distance.

A dark scalloped plate with two green leaf parcels tied with plant fibre and two opened pieces of white fish on rice, beside pink pickled ginger.
Pieces tied with plant fibre, served on a plate. Beyond its original function, the wrapping has also become the dish's badge of identity.Tomomarusan / CC BY-SA 3.0·CC BY-SA 3.0

And it should not be idealised: the origin has an unromantic side. The fishermen of Kishū did not cross the mountain out of gastronomic vocation but because they needed money to pay a high annual tribute, and selling salted mackerel inland was how to get it.

Which is why it is worth buying a box and eating it on the train heading south through the prefecture. You will be making, centuries apart and in the opposite direction, the same journey the fish made: across the mountains that separate these villages from the sea they were never part of.

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Lucía Montes

Worth Knowing editor — Meaning & Cultural Context · Flowtravel

Lucía Montes interprets the cultural meanings that make a travel experience make sense.