Bubo is a type of an Owl. Owls are symbols of Wisdom.
'Jitsu' or 'Jutsu' means a combat method, as contrasted to 'Do' - which means 'the Way'.
For example: Aikido, Aikijutsu.
Martial Arts can be either utilitarian, meant as a way of self-defense & protection - or can be a Way of Life.
Thinking is also a part of Martial Arts training, i am sure.
i am able to train that way for now at least, i am very grateful for that.
Martial Thoughts can influence how one trains & fights later.
Bubojitsu is a Philosophy aspect, a thinking aspect of the Martial Arts.
See also, if You wish: Joining Martial Arts' Pearls of Wisdom into a Mala of many Pearl Beads.