Geppo is one of the six techniques of "Rokushiki".
The Geppo allows the users to actually jump off the air itself, allowing them to stay in the air for much longer than usual. CP9 members can use this technique to cross great distances without ever touching the ground, or set themselves up for swift, aerial attacks.
Rob Lucci showed a variant of Geppo, where he combines it with Soru to create the three-dimensional movement Kamisori, while Fukuro could perform Geppo with one leg. It has once been used aggressively by Lucci, performing a suplex-styled move while Luffy clung onto his back. The impact left a rather large crater in the floor.
While the technique itself affords several advantages both in and out of battle for the user, it has but one major weakness: since its usage depends heavily on the user's legs, restraining or pinning down any major parts of their lower body can significantly disrupt Geppo. This was seen during Fukuro's fight with Franky, where the latter managed to grab on to one of the CP9's legs, noticeably affecting the technique. However, it should be noted that Rob Lucci has been seen kicking off the air with one leg at a time rather like hopping and keeping himself afloat. Just like Soru, there are other versions of this technique.
- Cho Sokuten: Tekkai Dama (超側転 鉄塊玉 Chō Sokuten: Tekkai Dama?, literally meaning "Super Cartwheel: Iron Mass Ball"): Fukuro combines his Tekkai Dama (spinning himself with Soru while using Tekkai) movements with Geppo to use it in midair. In the Viz Manga, this is called Super Cartwheel Iron Ball.
- Kamisori (剃刀 Kamisori?, literally meaning "Razor"): Used by Lucci. A combination of Geppo and Soru, where Lucci uses Soru in a zigzag motion in midair, allowing extremely fast movements in three dimensions. Other CP9 agents have also shown to use this technique or a similar one allowing them to move through the air at great speed. In the Pirate Warriors series, Lucci can use Kamisori to cut through enemies while utilizing its high-speed movements, and he can use the attack in his human form in the third Pirate Warriors game (while ending it with a smashing dive). In the Viz Manga, this is called Razor.
- Sky Walk (空中歩行 (スカイウォーク) Sukai Wōku?, literally meaning "Sky Walk"): After the timeskip, Sanji demonstrates this ability by kicking the air to jump higher, giving the appearance of flight. Sanji created this technique during his ordeal in "hell" to escape from the okamas. It was first seen used to escape after being surrounded by the Sea Urchin-Armor Spine Squad, making them hurt themselves. The kanji of the attack is read as "Kuuchuu Hokou"; hokou being a term for "walk" or an alternate reading for "kachi", a foot soldier samurai during the Edo period.
- Blue Walk (海歩行 (ブルーウォーク) Burū Wōku?, literally meaning "Sea Walk"): A technique that allows him to travel at incredible speeds, resulting in traveling at least as fast as a fishman underwater. Sanji kicks the water multiple times to gain impulse thus "running" underwater, and reaching considerable speed; in fact, this is the underwater version of Sky Walk. According to Sanji he created this technique after two years of running away near constantly from okama. It was first seen used to reach Surume, just before using Diable Jambe - Bien Cuit: Grill Shot. It is shown that this technique can be used in Nami's body.
- Geppo "Ikyaku" (月歩「威脚」 Geppō "Ikyaku'?, literally meaning "Moon Step/Might Leg): A non-canon variation from both Unlimited Adventure and Unlimited Cruise, where Lucci warps with a Geppo from midair to attack with a falling leg stomp. Used in his human form only.
- Geppo "Shukubaku" (月歩「蹴瀑」 Geppō "Shukubaku"?, literally meaning "Moon Step: Kicking Cascade"): A move from Gigant Battle 2; a non-canon variation both the Geppo and Lucci's standard followup from his Shigan "Sentoso" same game. This version of Shukubaku is the same as the original, only difference is that Lucci instead warps into the air to kick his opponent down instead of just leaping up to do so (along with the fact that it can also only be done in midair).
- When in Gear Fourth mode, Monkey D. Luffy is capable of jumping off the air, akin to Geppo, by utilizing the extreme compression of his rubbery body.