Trichophyton concentricum causes Malabar itch, a skin infection consisting of an eruption of a number of concentric rings of overlapping scales forming papulosquamous patches.
Nigiri sushi is a type of Japanese dish made with sushi rice and fresh fish. The sushi rice is hand formed into a small clump, and the fish is sliced and pressed on top of it. In some cases, nigiri sushi uses a small strip of toasted seaweed called nori to bind the whole mixture together, although this is not obligatory.
Born in 1799 to a greengrocer's family in Fukui Prefecture, Yohei left home in 1818 after dedicating more than ten years of service to his family's business. After moving to Tokyo and changing jobs several times, Yohei created his nigiri (squeezed) sushi and started selling it by carrying a box of it on his back. From about 1828, when Yohei was in his thirties, he started selling his sushi at a stand. As word spread of this new type of sushi that could be popped into the mouth, nigiri-sushi grew in popularity, and Yohei's business prospered.