South Korean private equity giant MBK Partners is moving forward with another major expansion in Japan after securing approval to acquire aluminum producer Alte Mira Holdings in a deal valued at roughly 117.5 billion yen, or about $739 million. The transaction marks a significant turnaround for MBK following months of uncertainty surrounding its failed attempt to acquire Japanese machine tool maker Makino Milling Machine, a deal that collapsed earlier this year after intense regulatory scrutiny from Tokyo.
Industry sources said MBK signed an agreement to purchase a full stake in Alte Mira from U.S. investment firm Apollo Global Management. The acquisition has already passed review under Japan’s Foreign Exchange and Foreign Trade Act, clearing one of the final major hurdles before completion. The approval process reportedly took only around two months despite Alte Mira operating in sectors tied to lithium ion battery production, which Japan classifies as strategically sensitive because of their connection to electric vehicles and defense related technologies.
The speed of the approval process stands in sharp contrast to MBK’s drawn out pursuit of Makino Milling Machine. Japanese authorities spent nearly a year reviewing that proposed takeover because Makino’s advanced machining technology was considered capable of both industrial and military applications. Concerns over technology leakage and national security eventually led regulators to recommend suspending the deal, forcing MBK to withdraw. The collapse represented a rare public setback for the private equity firm and raised questions about its ability to complete large scale acquisitions in Japan’s increasingly cautious regulatory environment.
By successfully securing the Alte Mira purchase, MBK appears eager to demonstrate that it remains committed to expanding in Japan despite the Makino disappointment. Alte Mira itself is a major player in the country’s aluminum sector, ranking second in the domestic aluminum can market behind Toyo Seikan while also producing industrial aluminum materials used across manufacturing and battery supply chains. The company was created through the merger of aluminum operations previously owned by Resonac Holdings and Mitsubishi Materials, with Apollo later combining and restructuring the businesses into a single entity.
MBK is expected to pursue aggressive operational changes once the deal closes. Reports indicate the firm plans to expand Alte Mira’s operations in Vietnam, strengthen its industrial product portfolio, and potentially pursue additional acquisitions to build scale in Asia’s aluminum market. An eventual public listing of Alte Mira is also being considered within the next several years as MBK looks to increase the company’s valuation before an exit.
The acquisition comes during a period when MBK has faced growing attention across several investments in Asia. In South Korea, the firm has been under pressure over its handling of struggling retailer Homeplus. MBK has spent months restructuring parts of the business while exploring asset sales and operational changes aimed at stabilizing the retailer’s finances. The firm’s efforts to sell off segments of Homeplus and secure emergency funding drew heavy scrutiny from labor groups, creditors, and political figures concerned about the future of the company and its workforce.
Even with those controversies, MBK remains one of Asia’s most influential buyout firms, and the Alte Mira transaction signals that the company is still willing to pursue large cross border investments despite regulatory and political headwinds. For Japanese markets, the deal may also indicate that authorities are prepared to allow foreign investment in sensitive industries when national security concerns are viewed as manageable.