First of two new anime installments commemorating the anime's sixth anniversary. (Source: MAL News)

Second season of Osomatsu-san.

The 1st BD & DVD volume of Osomatsu-san will have a new episode, replacing episode 1 of the original series which was removed due to the fact that it contained multiple parodies. It has been pulled entirely from streaming sites and the Japanese Blu-Ray release. This replacement episode is sometimes numbered episode 3.5 as listed on the home-media release, as it's chronologically placed after episode 3 (originally TV episode 4).

A short series depicting side stories about the brothers' daily life, released on dTV streaming service. It received an advance screening together with the movie on March 7 in Tokyo. (Source: AniDB)