Let me introduce you to the ultimate summer snack—kakigori.
Kakigori is a finely shaved ice served in a glass cup. Snow-white ice is drizzled with sweet fruit syrups, sweetened milk, or served with cream or another topping.

My favorite one is Ujikintoki 宇治金時 – the shaved ice topped with sweetened azuki beans and drizzled with unsweetened matcha sauce (pictured above).
When visiting Japan during summer, please pay attention to a small square flag with the kanji character ‘ice 氷’ in red color on the background of blue and white cotton cloth flying in the air at a sweet shop (pictured below).

This flag is telling you that the store has begun serving a summer specialty, kakigori! When the summer ends, the flag is removed from the storefront.
Naniwaya store, founded in 1909 in Azabu Juban, Tokyo, is where I would religiously commute every summer to enjoy the best Ujikintoki in the city.

Naniwaya specializes in classic Japanese sweets and snacks, including taiyaki (fish-shaped azuki bean-stuffed pancake) and yakisoba (stir-fried Chinese noodles). The eat-in space on the 2nd floor of the store is kept traditional; no air conditioning. We can enjoy kakigori without overcooling our stomachs!