 The aloha shirt, while considered casual attire in the mainland United States, is considered acceptable business wear in Hawaii, where it is well-suited to that state's warm and humid climate.Similarly, "Kariyushi style" attire is encouraged in Japan, especially southern locales of Japan, to allow more comfort in the workplace, and to encourage dress that conforms with Cool Biz guidelines.Akihiko Higa, a researcher of Kaiho Soken who has worked on a Kariyushi style project for an Okinawan clothing manufacturer, said, “It (the Kariyushi shirt) is easy-to-wear and highly functional for wearing either in an office situation or in a resort."