This defensive technique creates a wall of water around the user. Enemy attacks are completely intercepted by a fence of water blown out from the mouth, and is raised from below with tremendous might. The water is blown out in the form of a circle around the user, and it makes for a defense without openings. It is also possible for the user to control the amount of water and duration at will and form a wall with surrounding water, rather than spitting it out of their mouth. The wall's strength and resistance change following the quantity of chakra poured down into the water, so a skillful shinobi will be able to build a sturdy one. Furthermore, because the field of vision is maintained even while defending one can easily go on to the next move, which is a great advantage. The wall can also be formed from a pre-existing water source.
Tobirama Senju was able to produce one without a pre-existing water source, which was a testament to his skill and one of the reasons why he was selected as Hokage. In the manga the hand seal sequence for this technique ends in the same seal that activates the Byakugan, though Tobirama only needs one to use this technique. Furthermore, the anime creates a completely original and far more elaborate set of hand seals when Tobirama uses it in the form of having the right hand cupping the left hand with a thumbs-up.
Anjin Uzumaki's use of the technique also creates rotation within the wall, further enhancing its defensive properties but requiring finer control. It then resembles the whirlpools of his home village.