Japanese Hardest Food of Tuna - Traditional Smoked Tuna Production Process - Tuna Processing
Japanese Hardest Food of Tuna - Traditional Smoked Tuna Production Process - Tuna Processing

Katsuobushi (Japanese: 鰹節) is boiled, smoked and fermented skipjack tuna (sometimes referred to as bonito).

It is also known as bonito flakes or broadly called okaka (おかか).