Kenshiro Abbe, 8th Dan Judo did Ki Atsu.
Mostly in respect to recovery from strangulations.Sekiya Sensei also promoted a type of Ki Atsu/Do-In.Usually he would do this to relax students after a hard session.Other treatment I have experienced personally is Moxabustion.Cupping is also used on occasion.
Certain kokyu breathing techniques are also used as self healing methods.I found Moxa treatment to be very effective.
Interesting. I've never experienced moxabustion. Good to hear though.