I came across another NHK program profiling Aikido and Hombu Dojo. In this video one gets to see Hombu Dojo and what training is like there. Doshu demonstrates some nice Aikido and one can see Waka-Sensei Mitsuteru Ueshiba taking his ukemi. It might be interesting to someone who hasn't been to Hombu Dojo to see the world headquarters of Aikido and how crowded the classes are too. https://www.youtube.com/watch?v=TbnWeOltdkw