Secret jutsu mastered exclusively by certain clans and their members.
Kage Mane no Jutsu (Kage Shibari no Jutsu or Shadow Bind Technique)
invented and taught in the Nara clan. A close-range type jutsu which enables the user to use their shadow to control the opponent's body. They can further the reach of their shadow by using nearby shadows. The victim of this jutsu can only mimick the user's movements, and make none other. Another jutsu called Kage Nui (Shadow Sewing) enables the user to attack his enemies with his shadow.
Baika no Jutsu (Multi-Size Technique
Belongs to the "Chubby" clan, Akimichi. This jutsu allows the user to alter the size of their body. This is the basic jutsu of the Akimichi clan. Because of the increase in body mass, the user requires an increased intake of calories which is why the Akimichi can be seen eating- A LOT!
Shinranshin (Mind Derangement Technique), Shintenshin no Jutsu (Mind-Body Change Technique)
The Yamanaka clan's hiden (secret clan technique).Shintenshin is a spying technique which projects the users spirit into the opponent, taking complete control of the their body. Unfortunately, if the user moves at all during the transfer during the spirit, the user's body will be rendered useless until the spirit can return several minutes later. Due to the risk of the spirit missing, the jutsu is best and usually used in conjunction with a binding technique. Shinranshin has the abililty to control the opponents body movements for a short time without a spirit transfer, and therefore is less risky.
Jyuuken (Gentle Fist)
Hyuuga is known as the strongest clan in Konoha (after Uchiha's extinction). Besides the Byakugan, members of the Hyuuga also passed down a special fighting skill called Jyuuken (gentle fist). This fighting skill causes internal organ damage worse than normal attacks, and are able to stop/increase chakra flows in one's body by striking the tenketsu (chakra holes).
Kikaichuu (Parasitic Destruction Insects)
The most eerie-looking hiden (esp. for those who hate bugs) it belongs to the Aburame clan who loves wearing black eyeglasses. They raise bugs within their body and feed them with their chakra in return for the ability to use them in battle. These bugs have many purposes other than being used as a weapon, including being used as a scent tracker and a chakra thief.