There is a custom of narizumoku ijime (teasing of narizumoku), in which a cut is made on the bark of narizumoku and rice porridge is smeared over the cut with a kayuzue.
生樹木（なりずもく）の樹皮を傷つけ、傷口に粥杖で粥を塗り、「なるかならぬか」ととなえる、なりずもくいじめのふうもある。