A Feast Nurtured by a Volcano

Sakurajima, an active volcano in southern Japan. Surprisingly, there is a technique called “Haiboshi” that maximizes the flavor of seasonal fish using its volcanic ash. Let's explore the phantom technique that was once lost.

Sakurajima - Kagoshima Sea
Fish from Kagoshima Bay
Volcanic ash of Sakurajima
Mr. Nagi, founder of Sakurajima-Haiboshi bento
Ash-dried grilled fish (yellowtail)
Net-fishing in Kagoshima Bay

Transcript

00:01

Have you heard about the uniquely Japanese culture of "EKIBEN"?

00:07

Ekiben are lunch boxes sold at train stations that you can enjoy on your train journeys.

00:14

You'll find them brimming with various local charms.

00:18

Let's embark on a journey to encounter the best of Japan's Ekiben.

00:23

EKIBEN JAPAN!

00:29

In this episode, we're taking a look at an Ekiben with a deep connection to the active volcano Sakurajima:

00:38

the Sakurajima-Haiboshi Bento!

00:42

This Ekiben comes from Kagoshima Prefecture in Kyushu.

00:50

You're looking at Kagoshima Bay, created by Sakurajima's massive eruption about 30,000 years ago.

01:01

Look at this beautiful sea!

01:05

It's home to about 40 types of coral and over 1,000 species of fish.

01:11

It's truly a treasure trove of marine bounty!

01:18

Today, we're taking a ride on the IBUSUKI NO TAMATEBAKO,

01:22

running along a beautiful coastline, while enjoying a delightful Ekiben.

01:30

Let's see what's inside the Sakurajima-Haiboshi Bento purchased at the station.

01:37

It's impressively packed with 10 different items: a vibrant array of meat, fish and vegetables!

01:50

The star of the show is this beautifully grilled and sizeable fish fillet.

02:05

Now, let's see where this fish originally came from.

02:17

As golden hues begin to adorn Kagoshima Bay, a small fishing boat appears.

02:28

They're local fishermen, Mori Mitsuhide & Chitose, veterans of this trade for 20 years.

02:38

Each morning, they come to haul up the nets that were set the previous evening.

02:46

What's their catch?

02:48

Flounder.

02:49

Also...

02:50

Parrotfish.

02:52

And even more, harvested from the ocean's bounty.

03:00

This is a Marbled Rockfish, a high-grade catch.

03:03

They taste good fried or in Miso soup.

03:09

The Moris not only wholesale these fish to the market, but also sell them directly to locals.

03:16

They're much fresher, you see,

03:19

because the fish are prepared on the spot
before we take them home.

03:25

Sometimes it's tough because my hands get so cold.

03:28

Today was especially cold.

03:33

When we catch a big one,
it motivates us to work hard again.

03:44

In Kagoshima Bay, a variety of fish can be caught throughout the year.

03:51

The biggest catch of the day is this enormous Yellowtail.

03:56

Midwinter is peak season for this fish.

04:01

Mori is personally delivering these special fish.

04:06

- Hi.
- Hello.

04:08

He delivers them to a bento shop near the fishing port.

04:12

This is Nagi Shunko, the creator of the Sakurajima-Haiboshi Bento.

04:18

Thank you!

04:19

Please make something delicious with it.

04:23

It's not always determined which will be the main fish for the Ekiben.

04:28

Today, he is preparing the winter season Yellowtail,

04:33

as well as Parrotfish, a unique fish from the southern seas.

04:39

This is great quality.

04:42

It has an elastic texture.

04:44

It's as if the fat is clinging to the knife.

04:55

The Ekiben will feature the seasonal local fish rich in fat.

05:04

But this isn't your average grilled fish.

05:09

Haiboshi refers to "Ash-drying."

05:12

As suggested by the Ekiben's name, the fish is "ash-dried."

05:20

It's not a word you hear every day.

05:24

There's something essential to it...

05:31

The volcanic ash spewed out by Sakurajima, Kagoshima's iconic symbol.

05:39

Located just 4km away from Kagoshima City, where about 600,000 people reside,

05:45

Sakurajima remains an active volcano to this day.

05:52

In fact, there are years where it erupts more than 1,000 times.

06:01

This is the actual volcanic ash of Sakurajima.

06:05

You might be wondering how it can be used for Ekiben...

06:11

But it's actually essential!

06:17

It requires patient and diligent work.

06:21

First, the volcanic ash needs to be washed.

06:25

We want to get rid of the top layer.

06:30

See? Look at all of that.

06:32

The ash is washed repeatedly until there's no longer any debris floating to the surface.

06:41

After the debris has been removed, the ash is dried out in the sun.

06:49

It might dry pretty quickly.

06:52

The sun is so powerful.
It even has the effect of sterilizing.

07:00

The ash is dried and cleansed by sunlight for about 10 days.

07:06

Finally, after being baked in the oven at 300 degrees, the volcanic ash is ready for use.

07:17

And there you have it, the finished product.

07:20

This volcanic ash will work wonders on the fish.

07:28

First, the ash is spread out neatly, and a cloth is placed on top.

07:37

Next, fillets of fish from Kagoshima Bay are arranged on top of the cloth,

07:42

and then covered by a transparent film that allows moisture to escape.

07:50

Now we'll cover it with ash.

07:55

The fish is now completely sandwiched by volcanic ash.

08:01

It stays like this for three days.

08:09

When the volcanic ash is removed...

08:14

Hold on...

08:16

They don't appear to be dried.

08:19

They're close to being raw.

08:22

Fish are usually dried by exposure to air.

08:26

They oxidize, which is why they smell fishy.

08:30

With the ash drying method,
the moisture is removed without exposure to air.

08:35

The freshness is maintained,
and oxidation is prevented.

08:41

The volcanic ash absorbs the moisture containing the fishy smell.

08:46

It may enhance the umami flavor of the fish.

08:54

However, the true value of ash-dried fish is said to only be revealed after cooking.

09:03

Even after it's cooled down, it doesn't smell fishy.

09:08

That makes it great for Ekiben.

09:10

People can appreciate the "Ash-drying" method more
if they eat it cold.

09:17

That's why we created this EKIBEN.

09:20

It's not just fish.

09:22

He even ash-dries eggs by burying them in volcanic ash.

09:35

When left like this overnight, they become very delicious!

09:47

Using these ash-dried eggs, he prepares a thick Japanese-style omelette, rolling the egg into multiple layers.

09:56

It's one of the most popular items in the Sakurajima-Haiboshi Bento.

10:05

But why did Nagi start making Ekiben using volcanic ash in the first place?

10:15

Nagi, who had been working as a chef at a traditional Japanese restaurant,

10:20

encountered ash drying some 10 years ago.

10:25

He heard about dried seafood made using volcanic ash in port towns in Wakayama and Katsuura in Chiba, far from Kagoshima.

10:38

In fact, the volcanic ash they used came from Sakurajima in Kagoshima.

10:45

I was shocked.

10:49

Their websites were boasting about
how they sourced ash directly from Sakurajima.

10:55

They told me I'm a fool.

11:00

"Why aren't you utilizing a resource
that's literally raining down on you?"

11:08

Sakurajima is an active volcano that has erupted countless times throughout history.

11:17

The people of Kagoshima have feared the volcano, while also seeking ways to coexist with it harmoniously.

11:28

One way was the unique culinary culture of ash drying,

11:31

where foods such as meat, fish, vegetables, and tofu were dried using volcanic ash.

11:42

However, the laborious and time-consuming practice of ash drying eventually waned in popularity,

11:50

and Sakurajima's volcanic ash became a perceived nuisance, something that makes the city dirty...

12:02

Nagi revived a unique Kagoshima tradition that had long been forgotten.

12:07

Drying Kagoshima Bay fish using Sakurajima's volcanic ash.

12:18

People often ask me, "Why volcanic ash?"

12:22

100 years ago, everyone in Kagoshima was doing it.

12:26

The answer is simple.
There was an abundance of it right here.

12:32

It's truly one of a kind, a treasure of Kagoshima.

12:38

There's one more item with a deep connection to the volcanic ash of Sakurajima.

12:50

It's this pork simmered in sweet and savory sauce with ginger.

12:57

Kagoshima is famous for its black pigs.

13:02

But what makes these pigs special is their daily diet of sweet potatoes.

13:07

Kagoshima is well known for these, boasting the largest production volume in Japan.

13:15

Sweet potatoes tend to rot or become watery in moist soil.

13:21

However, in the soil of Kagoshima, full of Sakurajima's volcanic ash,

13:26

which provides excellent drainage and plenty of minerals, they grow exceptionally large and sweet.

13:34

Using sweet potatoes grown in these volcanic land as feed for the pigs...

13:41

Yields black pork known for its tenderness, rich flavor and sweet fat.

13:50

The ash is powerful
because it comes from an active volcano.

13:53

It's a blessing.

13:55

It's a blessing from the one-and-only Sakurajima,

14:00

so I want to make the most of it.

14:06

The power of Sakurajima's volcanic ash can also be experienced through this simmered pork.

14:17

Within this compact Ekiben, the Sakurajima-Haiboshi Bento,

14:22

we discovered the treasures of Kagoshima Bay and the power of the active volcano, Sakurajima.

14:38

What sort of Ekiben we'll encounter next?

14:42

EKIBEN JAPAN!

14:43

We look forward to welcoming you aboard again soon.