 Frustrated by the appearance of his teacher, who was openly critical of Ueshiba's martial arts and who appeared intent on taking over the classes there, Ueshiba left Osaka during the night, bowing to the residence in which Takeda was staying and thereafter avoiding all contact with him.Between 1940 and 1942 he made several visits to Manchukuo (Japanese occupied Manchuria) where he was the principal martial arts instructor at Kenkoku University.Whilst in Manchuria, he met and defeated the sumo wrestler Tenryū Saburō during a demonstration.