Kapu Kuʻialua; Kuʻialua; or Lua; is an ancient Hawaiian martial art based on bone breaking, joint locks, throws, pressure point manipulation, strikes, usage of various weapons, battlefield strategy, open ocean warfare as well as the usage of introduced firearms from the Europeans.

The Koa warrior group are credited by Black Belt magazine as the creators of the martial art of Kuʻialua.

[citation needed] The old warriors of this art would coat themselves with a thin layer of coconut oil and remove all of their body hair in order to be able to slip away and avoid being grappled in battle.

[3][1] While living on Oʻahu, Kamehameha II established three Lua schools (called pā kuʻialua) to help prevent extinction of this art.

Nāpuaʻuki's school, probably the most prominent one, taught 24 boys, including Kekūanaōʻa and John Papa ʻĪʻī of Kamehameha's court.