Korean firms shift supply chains to Southeast Asia amid US-China tensions

By Kim Dong-young Posted : August 21, 2025, 14:24 Updated : August 21, 2025, 14:24
Simmtech subsidiary Sustios operation facility in Penang Malaysia Courtesy of Simmtech
Simmtech subsidiary Sustio's factory in Penang, Malaysia/ Courtesy of Simmtech
 
SEOUL, August 21 (AJP) - South Korean manufacturers are deepening their presence in Southeast Asia, building factories and export hubs in Malaysia, Indonesia and Vietnam as they seek to reduce dependence on China and navigate shifting global trade rules.

The push reflects both rising geopolitical risks and the draw of lower labor costs in a region that has emerged as one of the world’s most attractive alternatives to Chinese manufacturing.

Southeast Asian governments are competing for investment with tax breaks and expedited permits, while free trade agreements have lowered barriers within the bloc.

Simmtech, a semiconductor substrate maker, operates a packaging plant in Penang, Malaysia, which has become a magnet for global chipmakers including Intel and Micron. Its subsidiary, Sustio, completed a $77 million expansion of the site earlier this year.

In Indonesia, Hyundai Motor and LG Energy Solution are building the country’s first battery-cell plant in Karawang, near Jakarta, with a $1.1 billion investment. The facility, expected to start operations in 2025, will produce up to 10 gigawatt-hours annually, largely for electric vehicles in South Korea and India.

Steel and chemical producers are also moving aggressively.

POSCO has set up cold-rolled and hot-rolled steel plants in Vietnam, while Lotte Chemical bolstered its presence in Malaysia by acquiring Titan Chemicals.

LS Electric, an energy equipment maker, opened a plant in Bac Ninh, Vietnam, to serve the region’s infrastructure boom.

Part of the appeal is political. Unlike China, Southeast Asian nations are largely insulated from the escalating trade and technology confrontation between Washington and Beijing.

Regional frameworks such as the Association of Southeast Asian Nations Free Trade Agreement and the Regional Comprehensive Economic Partnership have further cut tariffs on intra-Asian trade.

Cost competitiveness remains a decisive factor. Vietnam’s factory workers earn an average of $320 a month, less than half the average in China. In Indonesia, labor costs are 30 to 50 percent lower than in South Korea across many industrial sectors, offering savings for labor-intensive production.
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