Near Nakamise-dori in Asakusa, this is where you come for old-fashioned tempura fried in pure sesame oil — a local speciality that fills the air with an irresistible nutty aroma. The white building with a tile roof has been drawing hungry crowds for generations. If the queue outside is daunting (and it often is), try the annexe one block over. The prawn tempura is gloriously crisp, the sesame oil giving everything a depth that lighter oils simply can't match.