These patches are for kobudo instructors of the World Ju-Jitsu Corporation.
Instructors begin from the 1st level of teaching, which allows to teach up to the 1st level for all weapons, to move on to the second level for all weapons and end up with the third level for all weapons.
The course of studies to become an instructor of Kobudo is both long and demanding, becoming a sensei can't be taken for granted.
It requires mastery, great powers of concentration and the attitude towards teaching.