Couldn't Resize:

Clan: Urahara

Kekkei Genkai: Seishin Ryoku

Elements: Elements are up to the user but Ninjutsu must be primary or secondary.

Specialization: Bukijutsu or Taijutsu as primary or secondary.

Location: Konohagakure

Clan History: The Urahara clan is a clan that is a few centuries old. The first members started off as scholars, preferring to stay out of combat and learn how to sharpen their minds and abilities. Eventually, it was questioned why the clan even bothered to learn powerful abilities if not to use them in combat. It was then they realized that they were wasting the power that they had put so much effort into learning. So, the clan members started learning more combat-oriented abilities and became comfortable with the idea of fighting other shinobi. Eventually, Seishin Ryoku became the clan's trademark ability. The Urahara's learned that they could use the chakra they had taken years to hone to enhance themselves even further. By using their chakra and manipulating the flow inside of the body, they could gain complete control of every aspect of their body, even enhance their brain power. After the discovery of this ability, the Urahara became much more private than they were. It was their duty to keep the secret to this technique within the clan and ever since, no more has been heard from the Urahara clan.

Kekkei Genkai Description: The Urahara clan focuses on learning to control the mind and the body and use them in combat. Seishin Ryoku allows users to enhance their mind and their body with their chakra to perform tasks normal shinobi would not be able to do. By sending controlled bursts of chakra to specific areas of the body, they can gain control over certain body functions, such as the release of adrenaline.
Additionally, due to their history as scholars all members of the Urahara clan receives the "Multitasker" SC.

Drawbacks: Due to the clan's focus on combat, all Urahara members are unable to learn any type of healing ninjutsu. Members of the Urahara clan can also be particularly smug and are overly confident of themselves, therefore they must all take the "Foolhardy" SC

Members: Urahara, Jirou (Clan Leader)

Spoiler:

Add in at least 2 more drawbacks, as essentially you're getting a +2 to other jutsu with that KKG.

The clan jutsu has more than one rank, so detail what it does at each rank, starting with the lowest rank all the way to the highest ~

Also, this isn't happening at C-rank.

A-rank minimum.

So I wanted to do something else with my clan. Revamped and awaiting review.

In your Kekkei Genkai Description, can you state what it means by the chakra cost going down by 1? Do you mean the chakra cost of jutsu costing only as much as one rank below it? If so, please give it a minimum, as E-rank jutsus only cost 5 chakra, so any less would actually allow them to spam it without chakra cost.

In your Drawbacks, add that they all have to take the Blind Special Characteristic. State that this clan's negative special characteristics cannot be balanced by any positives.

Add more to your Drawbacks. Maybe add one, preferably two.

For your Earth Release: Tectonic Travel, I'm pretty sure at least one person on Saga might have invented an ability like that. I just thought I'd wanted to point this out to you, but you're still free to keep this as a Kekkei Genkai Jutsu if you wish.

And also, regarding the Earth Release: Tectonic Travel, give a maximum depth the user can tunnel into, and also a maximum distance the user can travel while underground. Also state explicitly the speed of the user while travelling underground, whether it is based off their rank, or if there is only a limited amount of speed. You can use the Jutsu Guidelines found here as a reference.

Regarding Earth Release: Upward Assault, I think you need to flesh this jutsu out a bit more. As there is a two post duration for this jutsu, I'm assuming that, after preparing this jutsu, you have a two post duration of which you can activate this jutsu? If so, please elaborate on this in your jutsu's Description.

Furthermore, please elaborate further on what you mean by B-rank and C-rank damages. By outer edge of the jutsu, do you mean at the 10m mark, or possibly at the 7 m mark, or so on? Please state explicitly what is meant by 'at the outer edge of the blast radius'.

This type of passive earth sensory is taken by the Yanagi clan of Iwagakure.

Revamped and awaiting review.

Bump

Jutsu time
Rush: You don't state how much of an increase to reflexes and speed. Please note than a normal C rank jutsu that is used to boost stats normaly just gives an increase of half a rank, to a single stat. Since you can only use it to dodge that would be enough of a drawback to bump it's requried rank down one, but still the problem of two stats.

Atomical takedown: It takes A rank jutsu to get a +1 to power/stat, not +2.

Fight or flight: Again, A rank for a single +1 stat, not B rank for 2 +1 stats.

I suggest rereading(I'm sure you read it once) the second post of the jutsu guidelines as it covers boot jutsu in better detail