One of the most authentic experiences of modern Japanese culture is visiting an izakaya! Originally known primarily for their alcohol services (much like a pub), izakayas have since become places where people can hang out and enjoy delicious finger foods and even full-course meals as preferred!
The best food I’ve ever had at an izakaya came from a particular establishment located on the famous Ameyoko shopping street just around the corner from Ueno station. I was introduced to the place by a friend who lives in the local area, claiming it to be a favorite of the local community!