Bukijutsu

Bukijutsu is a term used specifically outside of the context of the fighting techniques used in RP. For characters and their limits, this specifically refers to the unique fighting styles which people can learn and use. This applies to chakra natures, actual forms of bukijutsu, and more. Everyone has a limited amount of Bukijutsu slots, and almost everyone starts with only 1. Here are the things you can use your Bukijutsu slots for.
#Chakra Natures! This can include basic natures, but also kekkei genkai if your character is allowed to have them. This includes: Earth, Fire, Lightning, Wind, Water, Ice, Lava Release; etc.
#Fighting Styles! This includes the various fighting types unique to specific ninja and samurai! This typically falls under some level of taijutsu. This includes: Strong Fist, Gentle Fist, Four Legs Technique, Calorie Control, Drunken Fist; etc.
#Unique Traits! These are a bit more vague and less-known but they apply as well. This includes: Chakra absorption, types of manipulation; etc.