That was total domination on Honda's home track because Suzuka is owned by Honda. 6 out of the top 7 in GT500 were LC500's and a Lexus RC-F won GT300.
That was the 3rd race out of 8 this season so there's still a long way to go but hopefully Lexus can win a championship in their final Super GT season. Next year Toyota is switching over to a Supra based GT500 car for all teams.