The fourth season of Tensei Shitara Slime Datta Ken. 
Demon Lord Rimuru's dream of creating an alliance between humans and monsters takes a step closer to being realized. As Tempest continues to prosper, Granville Rozzo and his granddaughter, Maribel Rozzo, clash with Demon Lord Rimuru over their plan to protect mankind by ruling over them. Meanwhile, in El Dorado, Demon Lord Leon works toward goals of his own. The awakening of a new Hero draws near! 

(Source: Crunchyroll News)

Episode  - That Time I Got Reincarnated as a Slime the Movie: Tears of the Azure Sea | Trailer

8-bit

Bandai Namco Filmworks

Kodansha

Micro Magazine Sha

Bandai Namco Music Live

BANDAI SPIRITS

BS11

ADK Marketing Solutions

Sony Music Solutions

Nippon Television Network

That Time I Got Reincarnated as a Slime Season 4