Izayoi means "the sixteenth night," when the moons begins to wane. It also means "to hesitate," as the Izayoi moon rises more slowly than the full moon of the fifteenth eve. 
— Website description[1]
Izayoi (十六夜?) is a Module for Megurine Luka.
Description[]
This Module consists of a pink kimono with stripe and checkered patterns, a blue diamond-patterned sash tied with a thin yellow ribbon, and brown and red sandals with white socks.
In the back of Luka's hair is a thin lightest gray ribbon.
Game appearances[]
The Module first appears in Hatsune Miku: Project DIVA X where it can be obtained as a Rare Module Drop by clearing the Chance Time in the song "A Single Red Leaf" in Cloud Request mode and fully clearing the song. It is attributed with the Aura Elegant and its gameplay effect is "8-sec Rate Up".
Other media appearances[]
The Module appeared in the Hatsune Miku × Kodo Taiko Performing Arts Ensemble where it was used for the song "A Single Red Leaf".