Short answers, pulled from the story.
Kadokawa Shoten was founded by Genyoshi Kadokawa on the 10th of November 1945 in post-war Tokyo. The company launched with a vision to democratize knowledge through affordable books despite the devastation of World War II.
Haruki Kadokawa transformed Kadokawa Shoten from a traditional publisher into a multimedia conglomerate after taking the helm in 1975. He integrated film production, video game development, and magazine publishing to create a synergy that defined the Japanese entertainment industry.
Kadokawa Shoten ceased being a kabushiki gaisha on the 1st of October 2013 when it merged with eight other companies to become a brand company of Kadokawa Corporation. This restructuring marked the end of the original entity and the beginning of a new chapter under Kadokawa Group Holdings.
Kadokawa Shoten published influential series such as Neon Genesis Evangelion, Haruhi Suzumiya, Re:Zero, Code Geass, and Steins;Gate through its various imprints. These titles became cultural phenomena and were adapted into blockbuster films and television series.
Kadokawa Haruki Corporation was established on the 12th of September 1995 as a publisher to continue business activities while Haruki Kadokawa was under legal investigation. The company served as a vehicle to maintain operations and stability during the legal challenges of the 1990s.