Yamanaka, Nara, and Akimichi Clan Memorial

This is the memorial of the Yamanaka, Nara and Akimichi clan that stands in Konohagakure as a testament of the close-knit relationship between the three clans. Engraved on it are the symbols of the respective clans which commemorates the pact that the three clans made to work together, protect each other and Konoha.

Tradition
To strengthen their unity further, members of the Sarutobi clan give them earrings that are presented to each generation when they swear their oath. They wear the earrings so that they never forget their oath, as it's there whispering in it into their ear. Children wear the earrings of their parents from the day they become a genin to when they attain the rank of chūnin, so that their parents' oath is burned into their memory. Returning the earrings to their clansmen also symbolise that they are considered adults by their respective clans.

Ino–Shika–Chō
is the common name given to trios from the Yamanaka, Nara, and Akimichi clans. They are all famous and use a unique formation in battles. There are seventeen generations in history, the last three in active during the series:
 * 15th Generation
 * 16th Generation (Part I - Part II)
 * 17th Generation (New Era)

Trivia

 * Upon inauguration, the heads of the Akimichi clan take an oath which involves swearing to protect both the Nara and Yamanaka clans.