右腕

Etymology 1
Compound of. Also analyzeable as a contraction of older phrase, omitting the genitive particle.

First cited in 1921.

Noun

 * 1)  right arm
 * 2)  one's trusted subordinate
 * 1)  one's trusted subordinate

Usage notes
While monolingual Japanese dictionaries list counterpart, for the on'yomi reading, they do not list counterpart for the kun'yomi reading.

Etymology 2
Appears to be a coinage in Japanese based on 🇨🇬-derived roots, as a compound of. Alternatively, may be a shift in reading from the kun'yomi of migiude; however, both readings are first cited to the same year, in 1921.

Noun

 * 1)  right arm
 * 2)  right-handedness