Judo career Fukuda, standing at only 4' 11" (150 cm) and weighing less than 100 lb. (45 kg), became a judo instructor in 1937. She also earned a degree in Japanese literature from Showa Women's University. In 1953, she was promoted to the rank of 5th dan in judo. She traveled to the United States of America later that year, at the invitation of a judo club in Oakland, California, and stayed for almost two years before returning to Japan. Fukuda next traveled to the US in 1966, giving seminars in California. At that time, she was one of only four women in the world ranked at 5th dan in judo, and was one of only two female instructors at the Kodokan (the other being Masako Noritomi, also ranked 5th dan). In 1966, she demonstrated her art at Mills College, and the institution immediately offered her a teaching position; she accepted, and taught there from 1967 to 1978. During this time, Fukuda lived at the Noe Valley home of one of her students, Shelley Fernandez, and taught judo there in addition to her teaching at the college. When the class sizes grew, she shifted the classes to the Sokoji Zen Buddhist temple in the Japantown, San Francisco. She named her school the Soko Joshi Judo Club. Having settled in the San Francisco Bay Area, Fukuda gave up her Japanese citizenship to become a US citizen. In November 1972, following a letter campaign against the rule prohibiting women from being promoted higher than 5th dan, Fukuda (together with her senpai Masako Noritomi (1913–1982)) became the first woman promoted to 6th dan by the Kodokan. According to Fukuda, "the Kodokan was old fashioned and sexist about belts and ranks". In 1973, she published Born for the Mat: A Kodokan kata textbook for women, an instructional book for women about the kata (patterns) of Kodokan judo. In 1974, she established the annual Joshi Judo Camp to give female judo practitioners the opportunity to train together. That year, she was one of only three women in the world ranked 6th dan in judo. In 1990, Fukuda was awarded Japan's Order of the Sacred Treasure, 4th Class (Gold Rays with Rosette), and the United States Judo Incorporated (USJI) Henry Stone Lifetime Contribution to American Judo Award. In 2004, she published Ju-No-Kata: A Kodokan textbook, revised and expanded from Born for the Mat, a pictorial guide