When they arrived at Hashirimizu no umi (present day the Uraga Channel), Yamatotakeru's thoughtless words and deeds aroused the anger of Watatsumi (a tutelary of the sea).
走水（はしりみず）の海（現在の浦賀水道）に至った時、尊の軽はずみな言動が海神の怒りを招く。