What Is Himono (干物)? Why Japan Dries Fish in the Sun

Imagine walking through a small coastal town in Japan.

The ocean breeze is blowing.

Fishing boats are returning to the harbour.

And outside a little shop...

Fish are hanging in the sun. 🐟☀️

Wait.

WHAT?!

Why are people leaving perfectly good fish outside?

Isn't fish supposed to be kept cold?

And why would anyone deliberately dry it?

Well...

Welcome to the delicious world of Himono (干物), Japan's traditional dried fish!

Before refrigerators existed, Japanese people developed clever ways to preserve seafood.

Salt.

Sunlight.

Sea breezes.

And a little patience.

But here's the surprising part.

Today, Japanese people don't eat himono just because it lasts longer.

They eat it because it's DELICIOUS!

Drying fish can concentrate its flavour, firm up its texture, and create a rich savoury taste that's completely different from fresh fish.

So how does it work?

And why has this centuries-old tradition remained so popular?

Let's discover the fascinating world of Japanese dried fish.

What Is Himono (干物)?

The Japanese word 干物 (ひもの / himono) literally means "dried things."

It's made from two kanji:

• 干 (Hi) — To dry
• 物 (Mono) — Thing or object

Simple, right?

In Japanese food culture, himono usually refers to fish or other seafood that has been dried to remove some of its moisture.

The fish may be salted before drying, depending on the preparation.

Some varieties are dried outdoors using sunlight and moving air.

Others are dried indoors or with modern temperature-controlled equipment.

And here's something important.

Himono isn't necessarily completely dried out.

Many popular varieties are only partially dried.

They retain enough moisture to stay tender when grilled.

Think of it as fish that's somewhere between fresh and fully dried.

Not quite fresh fish.

Not quite fish jerky.

Something deliciously in between.

Why Did Japanese People Start Drying Fish?

Let's travel back in time.

Long before refrigerators, freezers, or supermarkets existed, Japan had a problem.

Actually...

A very fishy problem. 🐟

Japan is surrounded by the ocean.

Fish and seafood have been important parts of Japanese diets for centuries.

But fresh fish spoils quickly.

Imagine catching dozens of fish in the morning.

Great!

Now imagine trying to keep them fresh without refrigeration.

Not so great.

People needed ways to preserve their catch.

And one of the simplest solutions was drying.

By removing moisture from fish, people could slow the growth of many microorganisms responsible for spoilage.

Adding salt could further help preservation.

This made fish easier to store and transport, although the effectiveness depended on how thoroughly it was dried, salted, and stored.

Drying seafood became an important food-preservation technique in coastal communities throughout Japan.

But something unexpected happened.

People discovered that dried fish tasted different.

And often...

Even better!

What began as a practical preservation method eventually became a beloved part of Japanese cuisine.

Why Does Japan Dry Fish in the Sun?

Here's where things get interesting.

Why use sunlight?

Why not just cook the fish immediately?

Traditional sun-drying, called 天日干し (tenpiboshi), uses sunlight and circulating air to help remove moisture.

The process often begins by cleaning and preparing the fish.

Some fish are split open.

Others are left whole.

They may then be soaked in saltwater or salted directly.

Finally, they're arranged on racks or hung in a suitable drying area.

As the fish dries, moisture gradually evaporates.

But sunlight isn't the only important factor.

Airflow, humidity, temperature, and drying time all matter.

A cool, dry, breezy day may be more suitable than a hot, humid one.

And modern himono producers don't always use the sun.

Some use controlled drying rooms to achieve consistent quality and food safety.

So why is traditional sun-drying still appreciated?

Because it's part of Japan's long culinary heritage.

And when done properly, drying helps develop the characteristic texture and concentrated flavour that people love.

Why Does Dried Fish Taste So Good?

Here's the delicious science.

Fresh fish contains a lot of water.

When some of that moisture is removed, the remaining flavour compounds become more concentrated.

The result?

More flavour in every bite!

Drying can also change the texture of the fish.

The flesh becomes firmer.

The surface dries slightly.

And when the fish is grilled, the outside can become wonderfully crisp while the inside remains tender.

Salt can also enhance the flavour.

Together, these changes create a rich, savoury experience.

And there's another Japanese word worth knowing.

Umami (うま味).

Umami is the savoury taste associated with compounds such as glutamate and certain nucleotides.

Fish naturally contains substances that contribute to umami, and processing can influence how these flavours develop and are perceived.

So while drying doesn't magically create deliciousness out of nothing, it can make existing flavours more pronounced.

Fresh fish is delicious.

But dried and grilled fish?

That's a completely different experience.

What Is Ichiyaboshi (一夜干し)?

Not all Japanese dried fish spends days under the sun.

Some varieties are dried for a much shorter period.

One famous example is 一夜干し (ichiyaboshi).

The name literally means:

One-night drying.

• 一 (Ichi) — One
• 夜 (Ya) — Night
• 干し (Boshi) — Drying

Traditionally, ichiyaboshi refers to seafood dried overnight or for a relatively short time.

But here's something interesting.

Modern ichiyaboshi isn't always literally dried overnight.

The name often describes a lightly dried style rather than an exact drying schedule.

Because less moisture is removed, the fish can remain relatively soft and juicy.

When grilled, it develops a delicious balance.

Slightly firm outside.

Tender inside.

Rich, concentrated flavour.

It's especially popular with fish and squid.

So if you see 一夜干し on a Japanese menu, don't imagine a piece of rock-hard dried fish.

You might be getting something surprisingly tender.

What Types of Fish Are Used for Himono?

Japan produces many varieties of himono.

Different fish offer different flavours, textures, and levels of richness.

Here are some of the most familiar examples.

1. Aji no Himono (アジの干物) — Dried Horse Mackerel

<text-placeholder>Image: Grilled or traditionally dried aji, split open in butterfly style.</text-placeholder>

Aji, or Japanese horse mackerel, is one of the most popular fish used for himono.

It's often split open, salted, and dried.

When grilled, it has a savoury flavour and a pleasantly firm texture.

Aji no himono is especially common in traditional Japanese breakfasts.

Serve it with rice, miso soup, and pickles.

Simple.

Classic.

Delicious.

2. Saba no Himono (サバの干物) — Dried Mackerel

<text-placeholder>Image: Salted and dried mackerel prepared for grilling.</text-placeholder>

Saba is known for its rich, oily flesh.

Drying helps concentrate its strong, distinctive flavour.

When grilled, the skin can become crispy while the inside remains juicy.

If you enjoy bold seafood flavours, saba himono is worth trying.

3. Hokke no Himono (ホッケの干物) — Dried Atka Mackerel

<text-placeholder>Image: Large grilled hokke opened flat on a Japanese ceramic plate.</text-placeholder>

Hokke is especially associated with northern Japan, including Hokkaido.

It's commonly served split open and grilled.

The flesh is soft, flaky, and rich.

Hokke is also a familiar item at Japanese izakaya restaurants.

And here's something funny.

Sometimes the fish is so large that it takes up almost the entire plate.

Not exactly a tiny appetizer! 😂

4. Sanma no Himono (サンマの干物) — Dried Pacific Saury

Sanma is a long, slender fish strongly associated with autumn in Japan.

Although fresh grilled sanma is particularly famous, dried versions are also enjoyed.

Its flavour is rich and distinctive.

Perfect with a bowl of steamed rice.

5. Karei no Himono (カレイの干物) — Dried Flounder

Karei is a flatfish with relatively delicate white flesh.

When prepared as himono, it offers a milder flavour than oily fish such as mackerel.

It's a good example of how different seafood varieties produce very different dried-fish experiences.

What Is Hirakiboshi (開き干し)?

Have you ever seen a Japanese dried fish that looks like it's been opened like a book?

That's often 開き干し (hirakiboshi).

The word comes from:

• 開き (Hiraki) — Opening or splitting
• 干し (Boshi) — Drying

In this method, the fish is split open and spread flat before drying.

Why?

Because opening the fish increases the surface area exposed to air.

This can help it dry more evenly.

It also makes the fish convenient to grill.

Aji and hokke are commonly prepared this way.

And visually?

A row of opened fish drying on racks is one of the most recognizable scenes associated with traditional Japanese himono production.

Is Himono the Same as Fish Jerky?

Not exactly!

Although both involve removing moisture from fish, the finished products can be very different.

Fish jerky is generally dried to produce a chewy, ready-to-eat snack.

Himono, on the other hand, often retains more moisture and is commonly intended to be cooked before eating.

Here's a simple comparison.

	Himono	Fish Jerky
Texture	Often tender after grilling	Usually chewy
Moisture	Varies, often partially dried	Typically more thoroughly dried
Preparation	Commonly grilled	Often ready to eat
Serving style	Rice meals, set meals, izakaya	Snack
Flavour	Savoury, concentrated fish flavour	Often strongly seasoned

Of course, there are many variations of both products.

But if you've never tried himono, don't assume it tastes like a tough, dried snack.

Properly grilled himono can be surprisingly juicy.

How Do Japanese People Eat Himono?

Here's the best part.

Himono is usually incredibly simple to prepare.

The most familiar method?

Grilling! 🔥

The fish is cooked until the surface is lightly browned and the flesh is cooked through.

Depending on the type, it may be served with:

• Steamed white rice
• Miso soup
• Japanese pickles
• Grated daikon radish
• Soy sauce
• A wedge of lemon or sudachi citrus

And that's it.

No complicated sauce.

No elaborate presentation.

Just fish, rice, and a few traditional side dishes.

The flavour of the fish does most of the work.

Some varieties are salty enough that extra soy sauce isn't necessary.

And because many himono products are partially dried rather than fully preserved, they must be refrigerated or frozen as directed and cooked according to their packaging instructions.

Why Is Himono Popular for Japanese Breakfast?

Imagine waking up in a traditional Japanese inn.

You sit down at a low table.

In front of you:

A bowl of steaming rice.

A small bowl of miso soup.

A few Japanese pickles.

And a beautifully grilled fish.

Welcome to a classic Japanese-style breakfast.

Himono has long been a familiar component of Japanese breakfast meals.

It's particularly common at traditional inns, known as ryokan (旅館).

Why breakfast?

Because grilled fish pairs naturally with rice and other savoury side dishes.

It provides protein and a satisfying flavour without requiring an elaborate recipe.

Of course, not everyone in Japan eats grilled fish every morning.

Modern Japanese breakfasts vary enormously.

Toast.

Eggs.

Cereal.

Onigiri.

Or sometimes...

Just coffee while running out the door. 😂

But himono remains an iconic part of the traditional Japanese breakfast experience.

Where Can You See Fish Drying in Japan?

If you travel through Japan's coastal regions, you may encounter shops and producers specializing in himono.

One particularly famous area is the Izu Peninsula (伊豆半島) in Shizuoka Prefecture.

Coastal towns such as Atami and Numazu are known for seafood products, including dried fish.

You might see rows of fish displayed outside shops or packaged himono being sold as regional specialties.

Himono is also produced in many other parts of Japan, including Hokkaido and coastal communities along the Sea of Japan.

Different regions have their own seafood traditions.

And different local catches produce different kinds of himono.

It's a wonderful example of how geography shapes Japanese food culture.

Is Sun-Dried Fish Safe to Eat?

This is a reasonable question.

Especially if you're imagining raw fish sitting outside in warm weather.

Traditional drying is a food-processing technique, but drying fish doesn't automatically make it safe to eat.

Proper preparation requires careful control of factors such as salt concentration, temperature, humidity, drying time, hygiene, and storage.

Some fish can also develop histamine when mishandled, and drying or cooking won't reliably remove histamine once it has formed.

Commercial producers use appropriate food-safety procedures to reduce these risks.

And many himono products still require refrigeration or freezing.

So no...

You shouldn't simply hang fresh fish outside your window and hope for the best. 😂

Traditional food preservation involves knowledge, experience, and careful handling.

For consumers, the safest approach is to buy from reputable producers and follow the product's storage and cooking instructions.

Is Himono Still Popular in Modern Japan?

Absolutely!

Although refrigerators have made traditional preservation methods less essential, himono remains part of Japanese food culture.

You'll find it in:

• Supermarkets
• Seafood specialty shops
• Traditional Japanese restaurants
• Ryokan breakfasts
• Izakaya menus
• Regional souvenir shops

Modern producers also offer vacuum-packed and frozen varieties.

These make it easier for people to enjoy himono at home.

And while traditional sun-drying remains culturally important, many producers use controlled drying methods for consistency and food safety.

The technology has changed.

But the love for savoury grilled fish continues.

Why Is Himono More Than Just Dried Fish?

At first glance, himono might seem like an old-fashioned food-preservation technique.

Fish.

Salt.

Sun.

Done.

But there's more to it.

Himono represents something fascinating about Japanese food culture.

Making the most of what's available.

For coastal communities, drying helped preserve valuable seafood.

It reduced waste.

It made seasonal catches more useful.

And it created new flavours from familiar ingredients.

Over generations, these practical techniques became culinary traditions.

Today, people enjoy himono not simply because it's preserved.

But because they appreciate its distinctive taste.

Sometimes the most delicious foods begin with the simplest ideas.

And sometimes...

All you need is a fish, a little salt, and a good sea breeze. 🐟☀️

Frequently Asked Questions

What does Himono (干物) mean?

Himono literally means "dried things" in Japanese. In food culture, it commonly refers to dried fish and other seafood.

Why do Japanese people dry fish?

Historically, drying helped preserve fish before refrigeration. Today, himono is also enjoyed for its concentrated flavour and distinctive texture.

Is himono raw or cooked?

Himono is typically dried while uncooked and then grilled or otherwise cooked before eating. Always follow the product's preparation instructions.

Is himono always dried in the sun?

No. Traditional himono may be sun-dried, but modern producers also use indoor and temperature-controlled drying methods.

What is the difference between himono and ichiyaboshi?

Himono is a broad term for dried seafood. Ichiyaboshi refers to a lightly dried style traditionally associated with overnight drying.

What is the most popular fish for himono?

Aji (Japanese horse mackerel), saba (mackerel), and hokke (Atka mackerel) are among the best-known varieties.

Is himono salty?

Many varieties are salted before drying, but the saltiness varies by product and preparation method.

Can you eat himono without cooking?

Some dried seafood products are ready to eat, but many common himono varieties are intended to be cooked. Check the product label.

Is himono healthy?

Himono can provide protein and nutrients found in fish. However, its nutritional profile varies by species and preparation, and some varieties contain significant amounts of sodium.

What is hirakiboshi?

Hirakiboshi (開き干し) refers to fish that has been split open and dried. The opened shape helps expose more of the fish to air during drying.

Where is himono famous in Japan?

The Izu Peninsula, including areas around Atami and Numazu in Shizuoka Prefecture, is particularly well known for dried seafood.

Why is himono served at Japanese breakfast?

Grilled himono pairs well with rice, miso soup, and pickles, making it a familiar part of traditional Japanese breakfast meals.

🇯🇵 Keep Discovering Japan

Curious about Japan's traditional food-preservation techniques? Explore Japanese Fermented Foods: A Beginner's Guide to Natto, Miso, Koji & More to discover how Japanese food culture transforms simple ingredients into extraordinary flavours.

👋 Meet a JapPop Resident

Hok-Yeah (ホッケー) 🐟👌

Meet Hok-Yeah, a cheerful little fish who believes everything is going to be just fine.

Inspired by Japan's beloved hokke, a fish often enjoyed grilled as himono, he's always looking on the bright side.

Bad day?

It's gonna be okay!

Things getting a little heated?

Hok-Yeah! 😂

Even when life puts him on the grill, he keeps smiling.

His motto? "Everything's gonna be just fine!" 🐟👌

👉 Meet Hok-Yeah and discover more quirky residents from the JapPop Universe.

 

🇯🇵 About JapPop

At JapPop, we celebrate Japanese culture through playful illustrations, original characters, and stories inspired by everyday life in Japan.

From Japanese food and traditional festivals to folklore, language, and everyday customs, we explore the little details that make Japan so fascinating.

Himono is a wonderful reminder that some of Japan's most beloved foods began with practical everyday solutions.

Before refrigerators...

Before modern food processing...

People found ways to preserve the ocean's bounty using salt, air, and time.

And somewhere along the way, they discovered something delicious.

So next time you see fish drying in a Japanese coastal town, remember:

It's not just fish sitting in the sun.

It's centuries of food culture.

And possibly...

Tomorrow's breakfast! 🐟🍚😂

Discover Japan, one story at a time. 🇯🇵✨