Is the Rear Naked Choke (Hadake Jime?) , Kimura (Ude-Garami?), and the Omoplata (Ashi-Garami?) allowed? What about the Brabo choke? Because of a job change, I recently started Judo here in Korea after 8-9 months of BJJ. The Judo club I train with seems to know their stuff but they don't seem to be complete straight with what submissions are allowed on the ground. They say their rules are same rules used in Olympic competition but I think because they don't focus on ne-waza (Korean: gu-chigi) much its simply a topic that is out of sight and therefore out of mind. They even told me once that I couldn't triangle choke my opponent but later changed their mind after consulting with higher authorities. I don't want to challenge my instructors but I do want to have a good idea what I am an am not allowed to do when I do ne-waza. I checked the IJF rules but other than listing all Judo techniques (at least one of which I am certain is banned). If you know of any helpful links to help clear this up I would appreciate it. I searched Sherdog but the only info I found was the obvious stuff about neck-cranks, and leg submissions not being allowed.