This interview with George Ledyard is well worth a read over at the Aikido Journal website. It is entirely applicable to Daito-ryu, which George mentions a few times with regard to training methodology and skill transmission.
The Role of Ukemi in Aikido – Part 1
The Role of Ukemi in Aikido – Part 2
Or just listen to the recorded podcast of the interview here. Daito-ryu Ginjukai members should also listen out for Tro Ota’s namecheck.
