Zōri (草履) are flat and thonged Japanese sandals are quite similar to flip-flops.
Zōri are worn with Tabi socks to match formal kimono.
Geta (下駄) are a form of traditional Japanese footwear that resemble clogs and flip-flops. They are a kind of sandal with an elevated wooden base held onto the foot with a fabric thong to keep the foot well above the ground.