Pera Pera is a simple dictionary of Japanese Mimetic and Onomatopoeic words used in daily life and manga.
For those studying Japanese or reading manga, Pera Pera is a useful resource to aide understanding.
Onomatopoeia are words which try to imitate sounds. For example: wan wan (woof woof), nya (meow).
Mimetic are words used to describe the sound of an action or state. For example: goro goro (rolling around), pera pera (fluency).