After emperor jinmu ' s enthronement , on the first day when emperor jinmu took the office , michinoomi sang a piece of soeuta (waka poem sung to express one ' s wish in commemorating a certain occasion ) and pronounced sakasago (reverse-spelling ) to fend off evil . 神武天皇即位後はじめて政務を行う日、道臣命は諷歌(そえうた)・倒語(さかさご)をもって妖気を払った。