Ep. 66: Principal Kuno assigns Tatewaki Kuno to school discipline while Happosai uses him for underwear collection.
Aired on October 12, 1990Filler

66
Principal Kuno places Tatewaki Kuno in charge of maintaining school discipline. Happosai offers to train Kuno, but his true intention is to use him to expand his collection of underwear. Despite this ulterior motive, Kuno's combat skills improve significantly during the training. As a result of his enhanced abilities, Kuno issues a challenge to Ranma Saotome, setting the stage for a confrontation between the two characters.
Episodes
- Ep. 62 · Participants compete in a massive obstacle course for a trip to China
- Ep. 63 · Ukyo wears feminine clothes to attract Ranma, but he sees her only as a friend.
- Ep. 64 · Ranma and Genma return to Jusenkyo with Happosai to prevent past curses
- Ep. 65 · Principal Kuno returns from Hawaii to enforce mandatory haircuts unless students find a special coconut.
- Ep. 66 · Principal Kuno assigns Tatewaki Kuno to school discipline while Happosai uses him for underwear collection.
- Ep. 67 · Ranma Loses His Strength After Happosai's Attack
- Ep. 68 · Ranma receives hope from Cologne through the Hiryu Shoten Ha technique
- Ep. 69 · Ranma attempts to defeat Happosai using Hiryu Shoten Ha while the master remains calm.
- Ep. 70 · Ranma's Mother Arrives at the Tendo Dojo for a Visit