Mandarin orange (tachibana)
橘 tachibana

An evergreen citrus believed to be the fruit of eternal youth, so it stands for longevity and prosperity; formal and celebratory.
Nara period (Tachibana clan); Heian palace tree
The tachibana is a native evergreen citrus. In 708 Empress Genmei granted the surname Tachibana to the court lady Michiyo, and the fruit became that clan's emblem; legend in the Kojiki and Nihon shoki identifies it with the 'fruit of eternal youth' brought from the land of Tokoyo by Tajimamori. A tachibana tree (ukon no tachibana) stands before the Shishinden of the imperial palace. The Ii clan of Hikone later used a tachibana crest.
Ukon no tachibana and sakon no sakura are placed beside Hina dolls at the Girls' Festival.