Very nicely done. 
Few other good points are.
- No need to place your hand.
(Suiton: Mizurappa) - Water Release: Water Horn
Rank: B
Type: Offensive
Range: Mid
Chakra cost: 20
Damage points: 40
Description: After waving the Dragon → Tiger → Rabbit hand seals, the user creates a big jet of water that is launched from their mouth. This technique works exceptionally well with Lava Release: Quicklime Congealing Technique to help it become like cement.
Okay now it is a good technique, It can be used as a combo with lava release also but I don't think you have a lava release, do you?
Now for initiating it requires hand seal and after doing that you mold your chakra in your mouth and release it in a form of jet of water, as it is launched from mouth it does not require hand seal but remember it can only be used at mid range.

Few other good points are.
- No need to place your hand.
(Suiton: Mizurappa) - Water Release: Water Horn
Rank: B
Type: Offensive
Range: Mid
Chakra cost: 20
Damage points: 40
Description: After waving the Dragon → Tiger → Rabbit hand seals, the user creates a big jet of water that is launched from their mouth. This technique works exceptionally well with Lava Release: Quicklime Congealing Technique to help it become like cement.
Okay now it is a good technique, It can be used as a combo with lava release also but I don't think you have a lava release, do you?
Now for initiating it requires hand seal and after doing that you mold your chakra in your mouth and release it in a form of jet of water, as it is launched from mouth it does not require hand seal but remember it can only be used at mid range.