ONA
Oooku
Edo-period Japan stands strong and proud, decades after its imminent doom was prophesied. The new shogun, Yoshimune "Nobu" Tokugawa, encounters an array of traditions that, to her modern judgment, make little sense. An epidemic exclusively rages among men, resulting in men making up only one-fifth of the population. Still, three thousand young, agile, and beautiful men serve in the Oooku—the shogun's Inner Chambers.
To unearth the origins of the existing hierarchy where women head their families and govern the nation, Nobu reviews the chronicles of the odd disease. Customs and traditions have changed to accommodate for the plague; these new laws dictate the current culture and reflect the cruel story of the first female shogun, Iemitsu Tokugawa. Most notably, these customs seem to lead back to the moment a young monk, Arikoto Madenokoji, must abandon his way of life and devote his remaining days to the shogun and her Oooku.
Ona
Winter 2023
7.42
Ore no Imouto ga Konnani Kawaii Wake ga Nai Specials
The true end arc of Ore no Imouto. These four episodes branch out after the 11th episode of the main TV series and present an alternative version to the end of the TV series. These episodes contrast with the good end arc of the TV series, which was an original ending written for the anime, and instead closely follows the original story from the light novels.
Ona
Winter 2011
7.32
Ore no Imouto ga Konnani Kawaii Wake ga Nai. Specials
Episodes 14–16 of OreImo 2 which finish adapting the OreImo novels.
Ona
Winter 2013
6.31
Ore, Tsushima (ONA)
The stray cat Tsushima is adopted by an old lady—mistakenly referred to as "Ojii-chan"—who dreamed of owning a cat resembling a bear. The talking cat makes life both colorful and more exhausting for the poor old lady and her numerous other cats. These Ore, Tsushima shorts depict the everyday exploits of the sluggish leopard cat Tsushima.
Ona
Winter 2021
6.39
Osake wa Fuufu ni Natte kara: Yuzu Atsukan
Ona
Winter 2018
OTMGirls no Yokiyoki Channel
Ona
Winter 2020
Otona no Bouguya-san
Ona
Winter 2018
Otona no Bouguya-san (Rimen)
Ona
Winter 2019
Otona no Bouguya-san II
Ona
Winter 2021
Overflow
Ona
Winter 2020
Overlord: Ple Ple Pleiades - Clementine Toubou-hen
Ona
Winter 2018
Overlord: Ple Ple Pleiades 2
Ona
Winter 2018
Overlord: Ple Ple Pleiades 3
Ona
Winter 2018
Overlord: Ple Ple Pleiades 4
Ona
Winter 2022
Pankunchi
Ona
Winter 2007
Papa datte, Shitai
Ona
Winter 2019
Peeping Life: World History
Ona
Winter 2012
Peeping Life: YouTuber-kun
Ona
Winter 2013
Penguin Musume♥Heart
Ona
Winter 2008
PES: Peace Eco Smile
Ona
Winter 2012
Petit Seka
Ona
Winter 2022
Pi Zhe Lang Pi De Yang
Ona
Winter 2023
Pikotarou no Lullaby Lullaby
Ona
Winter 2017
Planetarian: Chiisana Hoshi no Yume
Ona
Winter 2016
Plastic Neesan
Ona
Winter 2011
Ple Ple Pleiades × Kagejitsu!
Ona
Winter 2023
Pluto
Ona
Winter 2023
Pokemon (2019): Kami to Yobareshi Arceus
Ona
Winter 2022
Pokemon Concierge
Ona
Winter 2023
Pokemon Daiundoukai
Ona
Winter 2020
Pokemon Evolutions
Ona
Winter 2021
Pokemon Generations
Ona
Winter 2016