1. Bleach #183
2. D.Gray-man #095
3. Soul Eater #018
4. Sekirei #006
5. Zero No Tsukaima Princesses No Rondo #005

A - B - C - D - E - F - G - H - I - J - K - L - M - N - O - P - Q - R - S - T - U - V - W - X - Y - Z

- Oboro Bunshin no Jutsu
A Ninjutsu technique similar to the Bunshin no Jutsu (Clone Technique), as these clones cannot attack. Whether or not they are made out of mist is hard to tell, but they are immaterial and will disperse when attacked.
- Oiroke no Jutsu
This attack is probably the most famous technique in the series, since it is also one that is introduced first in the series. It's a variation of the Henge no Jutsu technique, but instead of copying a person, the user copies a nude babe.
- Omote Renge
A forbidden Taijutsu technique (Kinjutsu) Rock Lee uses in his combo fighting style. To perform this technique, the ninja must first be able to open the Initial Gate, the first of the Hachimontonkou (Eight Celestial Gates) that limit the amount of chakra.
- Ori no Kongou Nyoi Kage Bunshin
This Ninjutsu technique utilizes the Kage Bunshin no Jutsu (Shadow Clone Technique) and Kongou Nyoi (Diamond Staff). The ninja, already in their Nyoibo form, produces a cage by creating a great number of shadow clones and then overlapping one another around an ally.