Imperial Bonsai Collection Video

Wow. I just finished a first detailed viewing of an hour-long video I came across about “The Emperor's Bonsai” ( https://www.youtube.com/watch?v=YwvQXyieBPY ), in Japanese with Japanese subtitles. It is a very worthy companion to my articles on the Imperial Bonsai Collection  ( http://www.magiminiland.org/BigPicture/Imperial.html ) and Tokugawa Iemitsu's Pine ( http://www.magiminiland.org/BigPicture/IemitsuPine.html ). I am very interested in getting an English translation or at least summary of the Sandai-Shogun history section from the 42:52 mark to 47:41. Anyone?