(judo) yuko, points or the judge call to the points in judo match. Fewer points to ippon.

staff, stick, walking stick, cane, stave, strove, rod, wand / something one leans on, a support / a cane used for corporal punishment

a jo: a fighting staff, a little over 4 尺 (shaku, “a traditional unit of measure, about 30 cm or a foot”) long, shorter than a 棒 (bō, “quarterstaff”)

self; oneself

(idiomatic) practice makes perfect

to use one's head

use one thing for many purposes / work someone hard

defense force

defender

(colloquial) current boyfriend