The story goes, the Tama-gawa River was flooded and a levee gave way, and when the village was in danger a great number of eels appeared out of nowhere and blocked the hole in the levee.
その話は、多摩川で洪水が起き堤防が決壊してもうだめかと思われたときに、どこからともなくウナギの大群がやってきて堤防に空いた穴をふさいだ。