Season 1 of Kamen Rider OOO was released on September 5 and consists of 48 episodes.
Episodes
1: Medals, Underwear, and a Mysterious Arm
Sep 5, 2010
A mysterious arm reawakens the Greeed from their slumber and decides to use Eiji Hino, a cheerful wanderer, as his means of getting back what he desires as Kamen Rider OOO.
2: Desire, Ice Pops, and Presents
Sep 12, 2010
Ankh explains the Greeed and the purpose of the Medals to Eiji, even as the human desires to merely use his new power to fight for good instead of for selfish needs.
3: A Cat, Evolution, and a Glutton
Sep 19, 2010
Ankh becomes troubled when Eiji prevents him from eliminating his possessed body's sister while another Greeed uses a man's gluttony to create more Medals.
4: Doubt, a Picture Message, and a Helping Hand
Sep 26, 2010
Ankh threatens to leave OOO for Kazari and the Greeed while investigating the evolution of humanity while Eiji tries to find more about Hina.
5: A Game of Tag, a Nest, and a Rich Girl
Oct 3, 2010
Kougami asks for a share of Eiji and Ankh's Medals, while Mezool decides to use Hina's shopaholic classmate to create a new Yummy.
6: Fashion, a Contract, and the Strongest Combo
Oct 10, 2010
Hina confronts Yamano's shopping addiction when her father goes bankrupt while Ankh confronts Kougami about his share deal of the Cell Medals.
7: A Lousy Husband, a Trap, and a Jackpot
Oct 17, 2010
Eiji tries to research a husband bullied by his wife that is being mocked by Gamel while Ankh follows a lead for a missing Core Medal.
8: Sabotage, Having No Greed, and Taking a Break
Oct 24, 2010
Amidst Hino's failed attempts at stopping the Komoris' argument, Momoko takes the winning scratchcard and throws it into a nearby river. As Takeshi frantically searches for it, she reveals to Hino why Takeshi has become so greedy.
9: Drenched, the Past, and the Scorching Combo
Oct 31, 2010
In flashbacks, Eiji fails to save a girl amidst a foreign civil war. In the present, Satonaka meets with Eiji to collect Kougami's fee until an explosion occurs outside.
10: A Fist, an Experiment, and a Super Bike
Nov 7, 2010
As Maki observes the bomber, Kougami Biotech Laboratory technician Toru Tadano, Ankh scolds Eiji, who later discovers Maki's whereabouts.
11: A Traveler, a Swallowtail, and a Celebrity
Nov 14, 2010
Eiji encounters an old friend and globetrotting blogger, Keisuke Tsukuba, who has come to Japan to find a publisher for his work.
12: An Eel, the World, and the Gravity Combo
Nov 21, 2010
Following Goto's attack, the Ageha Yummy retreats again while Eiji learns of Goto's distate towards him.
13: Episode 13
Nov 28, 2010
14: Episode 14
Dec 5, 2010
15: Episode 15
Dec 12, 2010
16: Episode 16
Dec 19, 2010
17: Episode 17
Dec 26, 2010
18: Episode 18
Jan 2, 2011
19: Episode 19
Jan 9, 2011
20: Episode 20
Jan 16, 2011
21: Episode 21
Jan 23, 2011
22: Episode 22
Jan 30, 2011
23: Episode 23
Feb 6, 2011
24: Episode 24
Feb 13, 2011
25: Episode 25
Feb 20, 2011
26: Episode 26
Feb 27, 2011
27: Episode 27
Mar 6, 2011
28: Episode 28
Mar 13, 2011
29: Episode 29
Mar 20, 2011
30: Episode 30
Mar 27, 2011
31: Episode 31
Apr 3, 2011
32: Episode 32
Apr 10, 2011
33: Episode 33
Apr 17, 2011
34: Episode 34
Apr 24, 2011
35: Episode 35
May 1, 2011
36: Episode 36
May 8, 2011
37: Episode 37
May 15, 2011
38: Episode 38
May 22, 2011
39: Episode 39
May 29, 2011
40: Episode 40
Jun 5, 2011
41: Episode 41
Jun 12, 2011
42: Episode 42
Jun 19, 2011
43: Episode 43
Jun 26, 2011
44: Episode 44
Jul 3, 2011
45: Episode 45
Jul 10, 2011
46: Episode 46
Jul 17, 2011
47: Episode 47
Jul 24, 2011
48: Episode 48
Jul 31, 2011
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