Japan head into Saturday's game with Tonga at Stade Ernest Wallon with a side that shows five changes and two positional switches from the team that started the 63-30 defeat to the Wallabies on Nov. 4.Tighthead prop Koo Ji Won is set to make his international debut in a team led by Michael Leitch, who moves from blindside to openside flanker.Leitch's move is to accommodate Kazuki Himeno, who shifts from lock to the back row following an impressive first game in national colors.Amanaki Lelei Mafi retains his place at No. 8 as do loosehead prop Keita Inagaki and hooker Shota Horie.However, th…READ FULL ARTICLE