Katsuobushi, a type of dried and smoked tuna that is often used to flavor dishes and is a key ingredient in dashi.

During the Edo period, which lasted from the 17th to the mid-19th century, Japan was ruled by the Tokugawa shogunate and experienced a period of peace and stability.

Karate, another martial art that originated in Japan, has also become a popular sport and is practiced by millions of people around the world.