Niconico has announced that “streaming of SHIROBAKO episode 6 has been temporarily suspended due to circumstances regarding rights.” The site also added that the return date of the streaming has not been determined, but the service will announce it as soon as it is confirmed.
Crunchyroll is also streaming SHIROBAKO in the Americas and several countries in Europe as well as other regions, and it also no longer lists Episode 6 “Idepon Miyamori: On the Move.”
The story of the episode, as well as the episode’s title (“Idepon Miyamori: Hatsudo-hen”), includes references to the Densetsu Kyojin Ideon television anime and its movie sequel The Ideon: Be Invoked.
Source: ANN