This water is said to have been dedicated to honzon in Nigatsu-do Hall as an apology because Onyumyojin in Wakasa was late for the meeting of the Gods and the event "Omizuokuri (on March 2)," where water is sent to this well, is held in Jingu-ji Temple (temples associated with shrines) in Obama city (Wakasa) even now.
この水は、若狭の遠敷明神（おにゅうみょうじん）が神々の参集に遅れたお詫びとして二月堂本尊に献じられたと伝えられ、若狭小浜市の神宮寺では今もこの井戸に水を送る「お水送り(3月2日)」の行事が行われている。