Method:
This technique come under both water manipulation and Stream.
Water manipulation:because a nearby water source can be manipulated to form this.
Stream: because the jutsu can be blown from önes mouth.
Counter:
The mist produced by this technique can be countered by a Powerful wind technique
By using a powerful wind jutsu there is also a possibility that the opponent will be damaged in that attack.
Performance:
I concentrate my Suiton chakra in my lungs. While releasing the suiton chakra I nature manipulate it to convert it into a thick mist which i blow at sensei. I also perform this technique by using a available water source,i walk to the lake and pass my chakra into it then i manipulate it to form thick mist which blows towards your direction.
Usage:
Very useful technique if the user has other ability like sensing and enhanced hearing or smelling. Because this technique not only affects the opponents vision but also it affects the user's vision too. It cannot escape Byakugan but it can fool Sharingan and rinnegan as the mist is formed by the users own chakra. It can be greatly used in combo with large area affecting water jutsus or wind jutsu which blow away the mist and the target. because the user first performs the kirigakure no jutsu and affects the sight of the opponent. then they use a high AoA long range water jutsu or wind jutsu so that the opponent cannot see it comming and the reaction time of the opponent will be reduced.
This is much much better.

Is there a particular reason why you're posting everything 2 times?
Okay, it's water manipulation and more projectile than stream. Just because it's released from the mouth doesn't make it a stream. The most important part of streams is that you can't perform other techniques while you're performing a stream, and the whole purpose of the hiding mist is that you use it just as a cover in order to attack the opponent from that cover.
Yes, wind is the number one defense against this jutsu because it also allows you to attack the opponent even if you don't see him. All you need is a wide wind technique and you're safe. Overall, good job.
(Suiton: Mizu Kuri No Yaiba) - Water Style: Sword of Draining
Rank: D
Range: Short
Chakra cost: 10
Damage Points: 20
Description: A technique that utilizes water to create a sword. The sword can be wielded in the normal fashion, allowing the ninja to cut and stab like with a normal blade.
Note: Doesn't require a water source.
As mentioned already, this technique doesn't require a water source, which means that you create it using your own chakra. You expel it through your chakra points in your hand and you shape manipulate it into a sword. The sword it more or less like any other blade but it's made of water. Once you form the sword you compress it, etc to make it solid and have all the other properties of a regular sword. What's interesting with this technique is that it can be a life saver in close battles or if the opponent knocks the real weapon out of your hand. It's fairly easy to create and you could even make it as an extension of your arm in case the opponent tries to avoid your initial punch. This would give you some extra distance and be like a follow up attack.