Simmered Bamboo Shoots (Tosani)たけのこの土佐煮


Japanese Food / Blog 266 Views

Cooked in classic Japanese seasonings, Simmered Bamboo Shoots is a simple and elegant dish to enjoy during springtime when fresh bamboo shoots are in season.  Crunchy and savory, they make a great side dish or accompaniment for drinks.

Simmered Bamboo Shoots in a handmade Japanese-style ceramic bowl.

Bamboo shoots, or takenoko in Japanese, are a commonly used vegetable in Japanese cuisine. With a nutty and slightly sweet flavor, the tender shoots can be prepared in many different ways. Today I’ll show you how to make popular Simmered Bamboo Shoots called Takenoko no Tosani (たけのこの土佐煮).

Simple & Delicious Simmered Bamboo Shoots

This traditional Japanese side dish is relatively easy to make. Here, bamboo shoots are cooked in a pot of flavorful liquid seasoned with everyday Japanese condiments.  Since the dish is usually served at room temperature, you can make it ahead of time and store in the refrigerator for up to 3 days. Serve it as a side dish to your main Japanese meal, or serve it as a snack to your alcoholic drinks.  Slightly salty and intensely flavorful, you’d be surprised how well it goes down with sake.

What’s Tosani? 土佐煮 

When katsuobushi, or dried bonito flakes, is added to soy sauce base simmered dish (nimono), the dish is called Tosani. The name of the cooking style came from Tosa, a former province of Japan, currently known as Kochi prefecture, located in Southwestern Shikoku island. This region is famous for its top-notch Katsuo (bonito), hence their katsuobushi (dried bonito flakes) are delicious. Simmered dishes that are cooked with smokey katsuobushi are appreciated for their deep-umami and complex flavors.

Ingredients that Go Well with Tosani


Very often bamboo shoots (takenoko in Japanese) are used to make Tosani as bamboo shoots alone are rather plain. The neutral flavor makes it easy to soak up all the flavors it’s paired with. There are few other vegetables that are also frequently cooked in Tosani-style. Here are some of them:

  • Konnyaku (Konjac)
  • Satsumaimo (Japanese sweet potatoes)
  • Fuki (Butterbur)
  • Gobo (burdock root)

Simmered Bamboo Shoots in a handmade Japanese-style ceramic bowl.

Where to Buy & How to Prepare Bamboo Shoots

Bamboo shoots are in season in spring between March through May. Keep an eye out when you visit Japanese or Asian grocery stores, you might be lucky to score some fresh bamboos shoots to make delicious Tosani. They can be hard to find when they are not in season or if they are not a common ingredient at where you are.

Most of the Japanese and Asian grocery stores sell pre-boiled and vacuumed packed bamboo shoot like the picture shown below. Do not use the canned variety to make Tosani.

Boiled Bamboo Shoots

The bamboo shoots are already boiled, so you can quickly heat up and enjoy right away.

Save Bamboo Shoot

When you use only half of the shoots (as in this recipe), you can save the leftover in an airtight container.  Make sure to soak the bamboo shoots in cold water all the time and change the water every day to keep it fresh until you are ready to use. They can last up to two weeks when they are properly refrigerated.

You can rinse off the gritty white substance in the bamboo shoot, but they are edible. If they don’t bother you, there’s no need to rinse it off.

Simmered Bamboo Shoots in a handmade Japanese-style ceramic bowl.

What to Do with Leftover Bamboo Shoots?

The mild flavor and tender-crisp texture of bamboo shoots make it an excellent addition to bulk out your stir fries, soups, salads or as a delicious topping to your noodle dishes. Aside from adding dimension to various dishes, bamboo shoots are also high in nutrients and low in calorie. Here are some recipes you can make with the leftover bamboo shoots.

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Simmered Bamboo Shoots

Simmered Bamboo Shoots in a handmade Japanese-style ceramic bowl.


Prep Time

15 mins

Cook Time

15 mins

Total Time

30 mins

Course: Appetizer, Side Dish

Keyword: bamboo shoot, dried bonito flakes, katsuobushi, nimono



  • 2 Tbsp sake
  • 2 Tbsp mirin
  • 1 Tbsp granulated sugar
  • 2 Tbsp soy sauce
  • 1 ½ cup water (350 ml) (you can use dashi too)


  1. Gather all the ingredients.

    Simmered Bamboo Shoots Ingredients
  2. Combine all the seasoning ingredients (2 Tbsp sake, 2 Tbsp mirin, 1 Tbsp granulated sugar, 2 Tbsp soy sauce, and 1 ½ cup water) in a saucepan.

    Simmered Bamboo Shoots 1
  3. Cut the bamboo shoots: cut the top 2-inch section into wedges. Then thinly slice the bottom section into quarter rounds, ¼ inch thickness.

    Simmered Bamboo Shoots 2
  4. Add the bamboo shoots in the seasonings in the saucepan. Place the otoshibuta (drop lid) on top, and bring to a simmer over medium heat.

    Simmered Bamboo Shoots 3
  5. Once the sauce is reduced to one third, remove the otoshibuta.

    Simmered Bamboo Shoots 4
  6. [Optional] In a frying pan without oil, heat up katsuobushi until it gets dry and fragrant. Let cool a little bit and break the katsuobushi into fine pieces with hands.

  7. Sprinkle Katsuobushi over the bamboo shoots and mix. Turn off the heat and serve at room temperature in a bowl. If you can find kinome leaves (I cannot get it here), garnish over the bamboo shoots. To get the fragrance going, quickly press the leaves between your hands like clapping motion. You can keep tosani in the refrigerator for up to 3 days.

    Simmered Bamboo Shoots 5

Recipe Notes

Recipe by Namiko Chen of Just One Cookbook.  All images and content on this site are copyright protected.  Please do not use my images without my permission.  If you’d like to share this recipe on your site, please re-write the recipe in your own words and link to this post as the original source.  Thank you.