Jamie - I've not located anyone who has had enough ukemi experience with Abe Tadaashi. At this time, that's an open "file." If any reader is aware of such a person, please put them in touch with me.
Our experiences with Tadashi Abe Sensei were brief. Pierre Chasang Sensei was Abe Sensei first French student in 1952. I have not been in touch with Chasang Sensei for several years. I know that `Dazzler` who posts on here was/is in contact with Chasang Sensei.
Co-author of `Positive Aikido`