Keywords: Oka Jurō.jpg Jurō Oka the father of modern Japanese whaling before 1923 http //heisei-shokasonjuku jp/kids/okajuro/ 山口 ひとづくり財団 http //web archive org/web/20160313000740/http //heisei-shokasonjuku jp/kids/okajuro/ archive anonymous other versions Custom license marker 2016 03 13 PD-Japan-oldphoto PD-old-1923 Jurō Oka People of Yamaguchi prefecture |