Abstract
This paper explains a speech database of prattle and chat of a female baby 'Emi' with her mother. They were recorded for about one hour almost every month since Emi was six months old until she became a child of forty-five months old. You can listen and analyze how she gradually develops her vowels and consonants, and after many repetitions of failure and success, she acquires words and sentences to chat fluently in her native language, Osaka Japanese.
