There a few bands named Avanti. Avanti was a now defunct indie rock band from Japan - Members were JUN (VOCAL & GUITAR), KUBOTA (GUITAR), ICHISE (BASS) and OKUWAKI (DRUMS). Label: http://www.3p3b.co.jp/bands/avanti.html
Tomoyuki Oki. Born on December 14th, 1965. He dedicated himself to table tennis in high school and Jr. high school until he listened to XTC’s 1st album “White Music”, when he decided to walk the path of a musician. In 1986, formed the group “Castella” along with his friends from the music club at Waseda University.