The Tokyo Marathon, first held in 2007, has become one of the most popular marathons in the world, with over 30,000 runners participating each year.

Karashi, a type of spicy mustard, is often served as a condiment with Japanese dishes such as sushi and grilled meat.

Yokohama is Japan's second-largest city and a major port city located south of Tokyo, with a population of over 3.7 million people.