Minebea Mitsumi’s CEO — dubbed the "King of Deals” in Japan — is seeking his biggest acquisition yet, even as a crumbling yen constrains his search.

The Tokyo-based maker of ball bearings and high-precision components is in the market to buy a company with revenue of ¥300 billion ($2.1 billion) or more in the next few years, CEO Yoshihisa Kainuma, 66, said in an interview.

Kainuma declined to elaborate further on a time frame or whether talks are ongoing, but he said separately that the company is keen to buy makers of machine components to beef up its product offerings. The company supplies a wide range of components to customers including Apple, Nintendo and Toyota, according to Bloomberg Data.