Dashi is a Japanese soup broth used in a variety of Japanese cuisine. It is made by simmering dried bonito flakes or dried kelp (called konbu).
Kaiseki 懐石 is a traditional Japanese multicourse meal. Basically consisting of hors d’oeuvre, soup, & 3 other dishes + pickles, rice, & dessert.
To learn “what is an ekiben,” let’s break it down. Eki is “train station.” Ben is short for “bento.” Bento is a lunch box. Ekiben is “train station lunch box.”
Kushi (串) means “skewered” and age (揚げ) means “fried.” I think you can guess where this leads, kushiage means “skewered fried food.“