From 1963 to 1970, to compete against unscrupulous ukulele manufacturers who tried to sell fake "Kamaka" ukuleles in Japan, Kamaka & Sons Enterprises collaborated with Tokyo Stringed Manufacturing Co., Ltd. to produce ukuleles for sale in Japan. Called "Keiki Kamaka," the ukuleles were made of mahogany, and were only available in the standard (soprano) size. "Keiki" means "child" in Hawaiian, a fitting name for the lowest-priced, beginner's model.