Key Takeaways
- • Japan invoked national security law to block Seoul-based MBK Partners' $1.7 billion acquisition of Makino Milling Machine, only the second such rejection under Foreign Exchange and Foreign Trade Act (FEFTA) in history.
- • Finance Minister Satsuki Katayama cited Makino's status as a world-leading machine tool manufacturer whose products are critical to Japanese defense equipment production, determining the deal posed "risk of undermining national security."
- • Makino's stock price dropped 8-10% in Tokyo trading following the government's recommendation, reflecting immediate market impact from deal termination.
- • MBK Partners, which announced the tender offer plan in June 2025 valued at 275 billion yen, stated it had presented measures to address security concerns and expressed surprise at the government's recommendation.
- • The blocking decision coincides with Prime Minister Sanae Takaichi's government unveiling its largest defense export policy overhaul in decades, signaling Japan's shift toward stricter foreign ownership controls over sensitive industrial assets.
Summary
The Japanese government formally asked Seoul-based private equity firm MBK Partners to cancel its planned $1.7 billion acquisition of machine tool manufacturer Makino Milling Machine on April 23, 2026, citing national security concerns. Finance Minister Satsuki Katayama announced the decision in parliament, marking only the second time Japan has invoked its national security law under the Foreign Exchange and Foreign Trade Act (FEFTA) to block a foreign acquisition.
Katayama's rationale centered on Makino's strategic importance to Japan's defense industrial base. The company ranks among the world's leading manufacturers of precision machine tools, with products widely utilized by Japanese defense equipment makers. After examining the investment's potential impact on Japan's production base and the risk of sensitive technology transfer, the industry ministry determined the acquisition would undermine national security. The decision reflects broader government concerns about maintaining control over critical defense-related manufacturing capabilities.
MBK Partners had announced its acquisition plan in June 2025 through a tender offer valued at 275 billion yen (approximately $1.7 billion), with the tender offer launch initially expected for late June 2026. The fund responded to the government's recommendation by stating it had presented specific measures to address security concerns and expressed surprise at the outcome. Makino itself said it was gathering information on the development with no immediate statement on next steps.
Market reaction was swift. Makino's shares fell between 8 and 10% in Tokyo trading following the announcement—the largest decline since May 2025. The timing of the government's action coincides with Prime Minister Takaichi's administration unveiling its most significant overhaul of defense export rules in decades, expanding permissible exports of warships, missiles, and other weapons systems. Government sources emphasized the rejection should not be interpreted as a signal that Japan is closing doors to foreign investment broadly, underscoring the decision's specificity to defense-sensitive assets.
Katayama's rationale centered on Makino's strategic importance to Japan's defense industrial base. The company ranks among the world's leading manufacturers of precision machine tools, with products widely utilized by Japanese defense equipment makers. After examining the investment's potential impact on Japan's production base and the risk of sensitive technology transfer, the industry ministry determined the acquisition would undermine national security. The decision reflects broader government concerns about maintaining control over critical defense-related manufacturing capabilities.
MBK Partners had announced its acquisition plan in June 2025 through a tender offer valued at 275 billion yen (approximately $1.7 billion), with the tender offer launch initially expected for late June 2026. The fund responded to the government's recommendation by stating it had presented specific measures to address security concerns and expressed surprise at the outcome. Makino itself said it was gathering information on the development with no immediate statement on next steps.
Market reaction was swift. Makino's shares fell between 8 and 10% in Tokyo trading following the announcement—the largest decline since May 2025. The timing of the government's action coincides with Prime Minister Takaichi's administration unveiling its most significant overhaul of defense export rules in decades, expanding permissible exports of warships, missiles, and other weapons systems. Government sources emphasized the rejection should not be interpreted as a signal that Japan is closing doors to foreign investment broadly, underscoring the decision's specificity to defense-sensitive assets.
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