There is a curious section in an interview with Minoru Mochizuki. It appears on pp. 117-118 of Stan Pranin's earlier volume Aikido Masters and on p. 91 of Aikido Pioneers. Mochizuki relates a request from Morihei Ueshiba to discuss with Minoru Hirai about returning to Tokyo after the war and getting 'the Ushigome Dojo back for O Sensei.'