Yes they from Japan. my work friend i show her this picture and say she has and they from japan she says i can have hers as the tank is green always and smells. she say she has a big male like this and one like this but delta big tail the females eat all the baby but 1 she is pink eye and is big now and will have some baby but all of the mothers now dead of old age and the others commit suicide and jump out. yes japan blues this one called she say.