Season 1
Season 1 • 2001
0A white ermine, known in Japan as an okojo, Okojo-san lives at an exotic pet store run by a greedy manager until one day he escapes. In the chaos following, he ends up unconscious in a garbage can, where college student Haruka Tsuchiya finds him. Mistaking him for a ferret, Tsuchiya takes Okojo home with him. At the Shiawase apartment complex, Okojo meets other pets, including the gerbil Chorori, and the various eccentric human tenants. With his friends, Okojo struggles to adapt to life with humans, vacuum cleaners, and all the other things that come with human society. The comedy is largely reliant on absurdity and Okojo's tendency towards melodrama.
Episodes
1. Okojo-san has arrived!/Okojo-san goes to the hospital
2001-10-02 • 25 min
2. Okojo-san's Shiawase-sou adventure/Laughing Saeki
2001-10-09 • 25 min
3. Okojo's grave/The enemy is a cleaning machine
2001-10-16 • 25 min
4. Kojopii goes to paradise/Kojopii's campus life
2001-10-23 • 25 min
5. Kojopii's secret/Kojopii vs Tacchin
2001-10-30 • 25 min
6. Tachhin's tears/Kojopii's nightmare
2001-11-06 • 25 min
7. Kojopii's makeover!/Kojopii in love
2001-11-13 • 25 min
8. The fantastic hiking/Cosmos-hata's Tsukahara
2001-11-20 • 25 min
9. Life with Kojopii/There is paradise in Kotatsu
2001-11-27 • 25 min
10. Yuki, Yuuta and Karaage/Leader Okojo! Appearance Chapter
2001-12-04 • 25 min
11. Choruri and Nezumi-dono/I like Kojopii
2001-12-11 • 25 min
12. Battle! Christmas tree/Kojopii's Merry Christmas
2001-12-18 • 25 min
13. Test for Leader Okojo!/Tsuchiya returns home
2001-12-25 • 25 min
14. Chichi's memories/Kojopii, TV debut
2002-01-08 • 25 min
15. Kojopii has been takened away
2003-01-15 • 25 min
16. The mystery of the missing drawing/Choruri's happiness
2003-01-22 • 25 min
17. Choruri VS Watabokori/Leader Kojopii! Battle Chapter
2003-01-29 • 25 min
18. Hari-nezumi is high-class?/Mayumi's love letter battle
2003-02-05 • 25 min
19. Mayumi's love letter battle/Save Itachi household!
2003-02-12 • 25 min
20. Tsukahara, day of dreams/Leader Kojopii! Duty Chapter
2003-02-19 • 25 min
21. Mystery of Ferret/Kojopii becomes a father
2003-02-26 • 25 min
22. Let's grow it! Seed of dreams/Kojopii flies in the sky
2003-03-05 • 25 min
23. Kojopii is trapped/Motemote's condition
2003-03-12 • 25 min
24. Kojopii becomes wild
2003-03-19 • 25 min
25. Leader Kojopii! Counterattack Chapter/Under the cherry blossoms
2003-03-26 • 25 min
26. Okojo VS Okojo/Thy name is Kojuru
2003-04-02 • 25 min
27. Kojuru goes to Shiawase-sou/Leader Okojo! New school term Chapter
2003-04-09 • 25 min
28. Tsubame is being targeted!/Kojuru's favourite thing?
2003-04-16 • 25 min
29. Ojuko and Granny/Leader Okojo! Hospitalised Chapter
2003-04-23 • 25 min
30. Death match! Carp's streamer/I want to meet my idol!
2003-04-30 • 25 min
31. Kagaku-kun's terrifying experiment/Leader Okojo! Teaching Chapter
2003-05-07 • 25 min
32. Being a mangaka is tiring/Hide-and-seek competition
2003-05-14 • 25 min
33. Miyu is a great trimmer?/Leader Okojo! Prosperity Chapter
2003-05-21 • 25 min
34. The lost wild nature/Yearning of humans
2003-05-28 • 25 min
35. I cannot say "Thank you"/Leader Okojo! Home visit Chapter
2003-06-04 • 25 min
36. Kagaku-kun's second challenge/Okojo VS Mecha-Okojo
2003-06-11 • 25 min
37. Kojuru and Choruri/Leader Okojo! Purchasing department Chapter
2003-06-18 • 25 min
38. Mayumi's date battle/Tsukahara's Okojo cut
2003-06-25 • 25 min
39. A wish upon a star/Leader Okojo! Pool Chapter
2003-07-02 • 25 min
40. Kojopii's return of kindness/Mayumi's pair-look battle
2003-07-09 • 25 min
41. Leader Okojo! Seaside School Chapter/Part-time Panic
2003-07-16 • 25 min
42. Poolside crisis!/Tsuchiya dances in delusion
2003-07-23 • 25 min
43. Colorful Kojopii/Leader Okojo! Guide to life Chapter
2003-07-30 • 25 min
44. Tacchin, a start in love/Kojoru, why are you white?
2003-08-06 • 25 min
45. I am Kojopii?/Hasegawa, afternoon times
2003-08-13 • 25 min
46. Tacchin's love and hatred/Heart-throbbing panic
2003-08-20 • 25 min
47. Yearning for Okojo/Leader Okojo! Summer holiday Chapter
2003-08-27 • 25 min
48. Choruri's marriage/Mecha-Okojo's counterattack
2003-09-03 • 25 min
49. I like you! Tsuchiya/Leader Okojo! Sports meet Chapter
2003-09-10 • 25 min
50. Warm Kojoru/Leader Okojo! Finale Chapter
2003-09-17 • 25 min
51. Shiawase-sou's Okojo-san
2003-09-24 • 25 min
