Short answers, pulled from the story.
TMS Entertainment was founded in 1946 as Kyokuichi, a textile manufacturer based in Nagoya, Aichi Prefecture. The company did not begin creating animation until decades later, evolving from textile production to the fur business before finally pivoting to entertainment.
Yutaka Fujioka established Tokyo Movie in 1964 with investment from Tokyo Broadcasting System. The studio's first production, an animated adaptation of Osamu Tezuka's Big X, was a financial disaster because the staff came from puppet theater backgrounds and lacked animation experience.
The Little Nemo film project began in 1978 and was suspended in August 1984 due to budget issues and director changes. The film was completed in 1988 and released in Japan in July 1989, but it failed to recoup its production costs of 5.5 billion yen.
Kyokuichi changed its name to TMS Entertainment Co., Ltd. on the 1st of January 2000. The company moved its headquarters to Shinjuku, Tokyo, in 2006 and relocated its production base to Nakano, Tokyo, in November 2012.
Hayao Miyazaki and Isao Takahata were originally slated to direct the Little Nemo film but dropped out in 1982 and 1983 respectively. They resigned due to conflicts with producer Gary Kurtz and the project's direction, leaving behind numerous unused ideas and sketches.
Sega Sammy Holdings acquired a 50.2% stake in TMS Entertainment in 2005, making it a subsidiary. The company became a wholly owned subsidiary of Sega Sammy Holdings in 2010 through a share exchange.