pronoun
himself; he himself
Reflexive pronoun emphasizing the male subject; used when the subject performs an action on or by himself, or to stress that it is he and not someone else.
彼自身がそれを認めた。
He himself admitted it.
彼は彼自身を責めた。
He blamed himself.
A more general reflexive pronoun meaning 'oneself'; can be used for any person, while 彼自身 is specifically male third person.
Compound of 彼 (かれ, 'he') + 自身 (じしん, 'self'). The reading かれじしん is a straightforward combination of the two components.