自じ家か薬やく籠ろう中ちゅうの物もの

noun

complete mastery; at one's beck and call

Idiomatic expression meaning to have something completely under one's control or at one's disposal, like a tool in one's own medicine cabinet. Often used in the pattern 〜を自家薬籠中の物とする.

• 彼かれはその技ぎ術じゅつを自じ家か薬やく籠ろう中ちゅうの物ものとしている。

  He has complete mastery of that technique.

• あの社しゃ長ちょうは優ゆう秀しゅうな人じん材ざいを自じ家か薬やく籠ろう中ちゅうの物ものにしている。

  That company president has talented people at his beck and call.