The Imanari Rroll is one of the most spectacular submissions in MMA and no gi grappling. Here’s Elliott Bayev from 30 Second Fight Finishes fame breaking down the main body mechanic that is the core of the move.
Full video with more Imanari Roll details, drills and entries here: https://youtu.be/y_DnyOJEp2Q?si=OWhs7QgUb_vqVyBH
30 Second Fight Finishes instructional here: https://www.grapplearts.com/finishes
Good luck with your training!