In "Nihonshoki" (Chronicles of Japan), it was already written that on February 15 AD 650 during the rule of Emperor Kotoku, Pung attended the ceremony of the white pheasant presentation (which was the start of changing name of an era) in Naniwanomiya Palace that was under construction.
『書紀』には既に孝徳天皇の650年2月15日、造営途中の難波宮で白雉改元の契機となった白雉献上の儀式に豊璋が出席している。