TV series
How far would you go… for the ones you love?
Located in the center of a remote island, the Abyss is the last unexplored region, a huge and treacherous fathomless hole inhabited by strange creatures where only the bravest adventurers descend in search of ancient relics. In the upper levels of the Abyss, Riko, a girl who dreams of becoming an explorer, stumbles upon a mysterious little boy.
Streaming, rental and purchase options
Checked Sep 2, 2026
You can also buy it from Amazon, Apple TV, and Fandango at Home. Use the direct links below to open the provider.
Located in the center of a remote island, the Abyss is the last unexplored region, a huge and treacherous fathomless hole inhabited by strange creatures where only the bravest adventurers descend in search of ancient relics. In the upper levels of the Abyss, Riko, a girl who dreams of becoming an explorer, stumbles upon a mysterious little boy.
Choose an episode, then use the watch options above for the show.
Episode 1
While exploring the Abyss, Riko comes across something she has never seen before. How does this new discovery impact her?
Directed by Hitoshi HagaWritten by Hideyuki KurataGuest stars Taishi Murata, Mutsumi Tamura, Manami Numakura, Yoko Soumi, Manami Hanawa, Maaya Sakamoto
Episode 2
Riko and Reg find out more about their past but the question still remains, who or what exactly is Reg?
Directed by Satoshi MoriWritten by Hideyuki KurataGuest stars Taishi Murata, Mutsumi Tamura, Manami Numakura, Yoko Soumi, Hitomi Nabatame, Tetsu Inada, Chafurin, Yuuki Shin
Episode 3
Reg goes on his first cave raid! Meanwhile, Riko makes preparations to go into the abyss to find her mother.
Guest stars Taishi Murata, Mutsumi Tamura, Manami Numakura, Manami Hanawa, Maaya Sakamoto
Episode 4
Riko and Reg start their adventure into the Abyss, while there they run into an unexpected familiar face.
Directed by Shinya IinoGuest stars Mutsumi Tamura, Manami Numakura, Tetsu Inada, Maaya Sakamoto
Episode 5
Riko and Reg descend into the Forest of Temptation. What new dangers will they find laying in wait for them there?
Directed by Toshiharu KudouGuest stars Aki Toyosaki, Sayaka Ohara, Maaya Sakamoto
Episode 6
Reg and Riko make it to the Seeker Camp where they meet Ozen the Immovable, the person who saved Riko all those years ago. But there is more to Ozen than meets the eye.
Guest stars Aki Toyosaki, Sayaka Ohara, Maaya Sakamoto
Episode 7
Ozen reveals more about the Abyss as well as the truth behind Riko's origins. What will happen when Ozen shows her true colors?
Directed by Shinya IinoGuest stars Mutsumi Tamura, Manami Numakura, Tetsu Inada, Aki Toyosaki, Sayaka Ohara, Maaya Sakamoto, Yuuki Shin, Takayuki Nakatsukasa
Episode 8
Ozen tasks Riko and Reg to survive alone outside the Seeker Camp. Do they come out alive and unscathed? Or does the Abyss have a dirty trick up its sleeve?
Directed by Shinya IinoGuest stars Aki Toyosaki, Sayaka Ohara, Miyuki Kobori, Maaya Sakamoto, Yuuki Shin, Takayuki Nakatsukasa, Yoshihisa Kawahara
Episode 9
Reg and Riko continue their descent after they leave Ozen's Seeker Camp. Riko's mettle is tested as Reg passes out and she has to fend for herself.
Guest stars Mutsumi Tamura, Manami Numakura, Hitomi Nabatame, Tetsu Inada, Aki Toyosaki, Sayaka Ohara, Manami Hanawa, Maaya Sakamoto
Episode 10
Reg and Riko run into trouble deep in the fourth layer where they meet an interesting creature, but are they friend or foe?
Guest stars Shiori Izawa, Maaya Sakamoto
Episode 11
Nanachi sends Reg on a mission to find certain items that could possibly save Riko. Meanwhile, Nanachi reveals a little more about themself.
Directed by Toshiharu KudouGuest stars Toshiyuki Morikawa, Eri Kitamura, Shiori Izawa, Maaya Sakamoto
Episode 12
Nanachi shows Reg the truth about the Abyss. Meanwhile, Riko is still recovering from her injuries when she has a strange dream.
Directed by Masayuki KojimaGuest stars Taishi Murata, Eri Kitamura, Shiori Izawa, Mutsumi Tamura, Manami Numakura, Rina Hidaka, Manami Hanawa, Yoshimitsu Shimoyama
Episode 13
Nanachi and Mitty's past is revealed. How did they become what they are and who is responsible for it? Meanwhile, Riko is on the mend after her injuries.
Directed by Satoshi MoriWritten by Hideyuki KurataGuest stars Maaya Sakamoto, Toshiyuki Morikawa, Eri Kitamura, Shiori Izawa
Episode information updated Sep 17, 2026
Miyu TomitaRiko (voice)
Mariya IseReg (voice)
Taishi MurataJiruo (voice)
Toshiyuki MorikawaBondrewd (voice)
Eri KitamuraMitty (voice)
Shiori IzawaNanachi (voice)
Maaya SakamotoLyza (voice)
Mutsumi TamuraNat (voice)
AT-XJapan
Kinema CitrusJapan
KADOKAWAJapan
CygamesJapan
TakeshoboJapan
AT-XJapan
