Complex sentence: In 1975, Kadokawa's president, Haruki Kadokawa decided to venture into the film business, launching the film division of Kadokawa Shoten, Kadokawa Pictures was born.
Split into simpler sentences: In 1975, Kadokawa's president, Haruki Kadokawa decided to venture into the film business. Hence, the film division of Kadokawa Shoten, Kadokawa Pictures was born.