Ryoko, pronounced 'ree-yoh-koh', is of Japanese origin and means 'like a child'. It's composed of two characters: 'ryo' meaning 'like' and 'ko' meaning 'child'. In Japan, it's often used for girls, though it can also be given to boys. Ryoko is a popular name in Japan, with notable bearers including Ryoko Aoki, a Japanese actress known for her roles in films like 'All About Lily Chou-Chou'. The name Ryoko is not very common outside of Japan, but it's considered unique and beautiful by many who use it.
Ryoko appears to be a name with somewhat irregular popularity over time, with births occurring in clusters spaced fifteen years apart on average.