Complex sentence: In 1952, Yuji Yoshimura, son of a leader in the Japanese bonsai community, collaborated with German diplomat and author Alfred Koehn to give demonstrations and the first formal bonsai courses opened to the public and outsiders in Tokyo.
Split into simpler sentences: In 1952, Yuji Yoshimura, son of a leader in the Japanese bonsai community, collaborated with German diplomat and author Alfred Koehn to give bonsai demonstrations. The first formal bonsai courses opened to the public and outsiders in Tokyo.