ヒカルの碁
is a Japanese manga artist known for several works, including "The Momotaroh", "Bomber Girl" and "Jinnairyū Jyūjyutsu Butouden Majimakun Suttobasu!!". Niwano has also written a manga adaptation of "Deltora Quest" which was adapted into an anime series, and was a mentor to Takeshi Obata of "Hikaru no Go" and "Death Note" fame.