A jutsu unique to Hikari. She releases Water Release chakra from her hand tenketsu and follows the steps of Rasengan training to form it into an entirely water-based Rasengan. Hikari could also imbue Torrent Release into her Rasengan. Hikari taught it to her daughter who taught it to the heir of the Haru Clan who then taught it to her eldest daughter who then taught it to her sister, Haruka. Haruka then taught it to her daughter, Fuyuki. Bane Haru self-taught himself the technique after observing her sister use it.