The Yamanaka clan is one of the oldest clans, being among the very first clans to reside in the newly-founded Konohagakure village along with Uchiha, Senju and Hyūga as the Yamanaka clan's flower shop existed in Hashirama's era as well.
Though not battle-type by nature, Members of the Yamanaka clan are sensors & telepaths with mind altering abilities such as mind-controlling & mind-reading etc., making them experts at Information gathering, Tracking, Interrogation, Communication, Reconnaissance & Espionage etc.
Yamanaka clan techniques were one of the most widely used techniques in the Fourth Shinobi World War, especially the Mind Transmission Technique which was the only source of communication within the Shinobi Alliance.
Yamanaka clan is a part of the Legendary Ino-Shika-Cho trio, the second strongest trio, along with Nara & Akimichi Clan. The 3 clans uses combination attacks in formations in such a way each member's abilities complements the others' in the best way possible with high accuracy.
Members of the Yamanaka clan lead the Analysis Team of Intelligence Division and the Sensory Division of Konohagakure. With Sai now being a part of the Yamanaka clan, Konoha ANBU is also currently lead by a Yamanaka, hence the clan having a very high authority in the village.
Despite being ninjas, members of the Yamanaka clan are also skilled Botanists as they run a flower shop in the village by the name "Yamanaka Flowers".
Members of the Yamanaka clan often wear their hair in ponytails which appears to be traditional in order to be easily recognizable within the community, and earrings in order to demonstrate their representation in the Ino-Shika-Cho trio.
Yamanaka Clan was acknowledged by Tobi/Obito Uchiha in his fight against Fū Yamanaka, Amado from the Kara Organization, Danzō as he chose a Yamanaka from the Root to be his bodyguard, and Hashirama seeked aid specifically from a Yamanaka clan member in the Fourth Shinobi War.
The Yamanaka Crest is a Bush Clover flower which represents "A positive love who treasures bonds". Inoichi Yamanaka, the late head of the clan raised his daughter Ino Yamanaka to embody this title, and believed that she had bloomed into a beautiful Bush Clover before his death.
After Inoichi Yamanaka's heroic death, Ino became his successor and took over the lead of the Yamanaka Clan in the Fourth Shinobi War. She continues to lead the Clan, the Sensory Division and the Analysis Team while also running the clan's flower shop currently in the Peace Era.
After Ino's marriage to Sai, Sai took over the Yamanaka surname, officially becoming a part of the Clan. Hence the Yamanaka blood now has the potential to perform Sai's exclusive Super Beast Scroll Technnique. Ino & Sai gave birth to Inojin Yamanaka, a promising heir to the Clan.
Biwako Sarutobi, once the First Lady of Konoha, is believed to be initially from the Yamanaka Clan before her marriage to Hiruzen Sarutobi as she was seen working in the Yamanaka flower shop in a flashback and she wears her hair in Yamanaka Clan's traditional Ponytail style.
The name "Yamanaka" means "in the middle of mountains" or "in the mountain range", and Yamanaka Clan's customary prefix "Ino" is the short form for "Inoshishi" which means "Boar". It is known that wild boars are heavily associated in the mountain ranges of Japan.