Takadanobaba 高田馬場

Food

100 or 150 yen Conveyor-belt Sushi Chain HAMASUSHI (HAMAZUSHI) はま寿司 in Japan

I recommend 2 seasonal items. "Cod Milt Sushi" and "Unsweetened Egg Custard with Matsutake Mushroom" are delicious.
Food

KIRIN ICHIBAN FROZEN BEER is instragrammable in Japan キリン一番搾りフローズン・インスタ映え

This is draft beer topped with somethingfrozen. It looks like ice cream, but it is not soft serve ice cream or normalfroth.Actually, it is icy froth which is also made of beer.