This new idea was called "Nyorai Joju Fuheni" (Nyorai is always staying here without any change) or "Sanbo Ittai Joju Fuheni" (A set of three treasures of Buddhism is always staying here without any change) or "Kuon Joju" (Buddha is always staying here forever.)
これを如来常住不変易、あるいは三宝一体常住不変易、また久遠常住という。