The 0.01mm Secret: Why Katsuobushi Makes Japanese Food So Delicious
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(1) Video Section
(2) Ryota's One-Point Advice: The Science of 0.01mm & 80°C
Did you laugh at Shunta sneezing? Katsuobushi (Bonito flakes) is shaved to a microscopic 0.01mm—thinner than a human hair! But scientifically speaking, this isn't just for show.
The secret is "Surface Area." Because it's so incredibly thin, the moment it touches hot water, the Umami (Inosinate) is extracted instantly.
But here is the golden rule: Never use boiling water (100°C/212°F).
You must use 80°C (176°F). If the water is too hot, you will extract bitter flavors and fishy smells, making your Dashi cloudy. 80°C gently releases only the pure, golden Umami.
Today, we apply this pure Dashi to "Ohitashi" (Japanese Spinach Salad). Ohitashi literally means "steeped in dashi." The Dashi is the absolute star!
Have questions about this temperature trick? Ask me directly in our community!
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(3) Ingredients (Serves 2)
- Spinach: 1 bunch (about 200g)
- Salt: 1 tsp (for boiling water)
- Soy Sauce: 1 tbsp
- Mirin: 1 tbsp
- Katsuobushi (Bonito flakes): A pinch for topping (Watch out, don't sneeze!)
- Dashi Stock (Bonito): 150ml (Remember the 80°C rule!)
- 💡 Don't know how to make authentic Dashi? Check our [Basic Dashi Guide]
(4) Instructions
1. The Golden Dashi: Heat water to 80°C. Turn off the heat, add Katsuobushi, wait 1-2 minutes, and strain gently. Mix 150ml of this Dashi with Soy Sauce and Mirin.
2. Blanch the Spinach: Boil water with salt. Boil the spinach stems for 30 seconds, then push the leaves in for another 30 seconds.
3. Ice Shock: Quickly transfer the spinach to ice water. This scientifically stops the cooking and keeps the bright green color!
4. Squeeze & Cut: Squeeze the spinach tightly to remove excess water. If you don't, the water will dilute our beautiful Dashi! Cut into 4cm pieces.
5. Steep (Hitashi): Soak the spinach in your Dashi mixture for at least 15 minutes in the fridge. Top with fresh Katsuobushi before eating!
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