This image of a goddess is a shinzō: a statue manifesting a kami, or Shinto deity, in corporeal form. Her hidden hands meet under her sleeves and her legs are folded in the lotus position, though the block of wood from which the legs are carved is a later addition. The flower-shaped headdress is fairly unusual in a statue of a Shinto deity. Decorations of lotus flowers with four petals are outlined in vermillion across the robes.  
Audio guide 

This female kami, a Shinto deity, sits cross-legged with both hands tucked into her sleeves placed in front of her. She has a flower-shaped ornament at the top of her hair; such ornamentation is rare for an image of one of Japan’s native deities. The legs, carved from separate pieces of wood, are a later replacement. The garment has a design of scattered four-petaled flowers outlined in vermillion.
 
YAMAGUCHI RyusukeEnglish by Mary Lewine 
Buddhist Art Paradise: Jewels of the Nara National Museum. Nara National Museum, 2021.7, p.336, no.165.