While exploring Kagoshima Jingu I watched to miko practising for a ceremony later that night.
Miko Mai, or Miko dance is believed to originate with the dance performed by the goddess Uzume in front od the cave wherein the sun goddess Amaterasu had hidden herself.
It is often sid it is the origin of kagura. I have seen it performed by single miko and by groups of 4 miko, but never by 2.
An earlier post with video of 4 very young girls performing can be found here
The ceiling of the shrine was quite stupendous. The performance of the dance was a little surreal without any musical accompaniment.