In some cases, a 'masakaki' which is a sakaki (a branch of the evergreen sacred sakaki tree) decorated with a silk flag that has five colors -- green, yellow, red, white, and blue -- is erected in the left and right sides of the altar.
祭壇の左右に、緑・黄・赤・白・青の五色絹の幟に榊をつけた「真榊」を立てる場合もある。