Umi Monogatari: Marin's "What Is This?"

Specials that streamed earlier on in the season, featuring new characters and cameos by Momon-chan and Tanu.

DVD specials of Umi Monogatari. Kanon (and sometimes other characters) tours the viewer around Amamikoshima, while also commenting about characters and events from the series.

DVD and BD specials of Umineko no Naku Koro ni containing the parody dubbing by the original cast.

Special episode 9.5.