Mercado de Peixes de Tsukiji

An onigiri store selling over 40 types of handmade stuffed rice balls—a staple breakfast for Tsukiji workers. They use ingredients fresh from the market, like large prawns and salted salmon roe, and the rice balls are so big that one is enough to fill most people up. They’re so delicious that you’ll probably buy more anyway, though. This store is very much catered towards market workers rather than the general public, which means that they open at 3 am and shut at 3 pm—don’t wait until it’s too late to visit.