Né le Sep 16, 1968 à l'endroit suivant : Yokohama, Kanagawa, Japan
Known as Masaaki Uchino (内野 聖陽 Uchino Masaaki) until July 2013, when he changed the pronunciation (though not the spelling) of his stage name to Seiyo Uchino (内野 聖陽 Uchino Seiyō).
