South Korea, Japan, and China: Who is driving Vietnam’s manufacturing boom?
20 Feb 20265 min read
Summary
- Vietnam’s manufacturing growth is often described in broad terms. Trade has expanded rapidly, and foreign investment continues to flow in.
- But the story is more layered. South Korean firms anchor the electronics ecosystem. Japanese investors built early stability in automotive and industrial supply chains. Chinese capital has accelerated recent expansion, especially in upstream components.
- The question is not whether Vietnam is growing. It is which external forces are shaping that growth, and how much control Vietnam retains over its trajectory.
Vietnam’s manufacturing ascent predates the U.S.–China trade war and reflects three decades of sustained foreign investment and export-led growth. Manufacturing’s share of GDP rose from under 10 percent in the early 1990s to about 27 percent by 2022, while total trade expanded to more than 180 percent of GDP, making Vietnam one of Asia’s most trade-dependent economies. Foreign-invested firms now account for roughly 70 percent of exports, with manufacturing attracting the majority of inward capital. By comparison, Malaysia approved around USD 45 billion in investments in H1 2025, with foreign capital representing over 56% of total approvals, particularly in high-tech manufacturing and services. Indonesia, while attracting rising FDI, still relies heavily on domestic firms and commodities for its exports. Vietnam’s trade turnover reached USD 930 billion in 2025, equal to more than 170 percent of GDP, according to VietnamExportData. Within this highly FDI-driven system, South Korean and Japanese firms built the early industrial base, while Chinese investors have driven the most rapid recent expansion. Which of these forces now shapes Vietnam’s manufacturing trajectory most decisively?
South Korea anchors Vietnam’s electronics sector
South Korea has anchored Vietnam’s electronics boom, but it’s a broader ecosystem than Samsung alone. Thai Nguyen and Bac Ninh host Korean-led clusters producing smartphones, displays, and components, with Samsung’s investments as the flagship. LG’s OLED plants, Hynix memory fabs, and CJ’s chemical suppliers complement this, drawing Korean firms into a supply web that hits 70% FDI export share.These hubs excel in high-volume assembly for global chains, boosting Vietnam’s electronics output to 17.8% of FDI by 2024, up from 4% in 2010. Yet the model leans export-focused: local content hovers at 30-40%, with limited upstream R&D transfer, as Korean chaebols prioritize efficiency over deep localization. Japan’s precision parts and China’s scale fill gaps, but Korea’s volume drives the sector’s global punch.
Japan’s early investments built stability
Japan's early moves into Vietnam's manufacturing scene helped build reliable supply chains, but it wasn't just about the money, government policies and infrastructure played a huge role too. Japanese firms like Toyota, Honda, and Denso got in early, especially from the 1990s, focusing on automotive parts and machinery in places like Vĩnh Phúc and northern industrial parks. Their approach emphasized quality training and long-term supplier ties, boosting local capabilities without massive volume floods.Key Sub-SectorsJapanese investments targeted automotive and electronics hardest. In autos, firms expanded assembly for vehicles and parts, with cumulative multi-billion investments; Vietnam's auto capacity hit nearly 1 million units by 2022, driven partly by Toyota, Honda, and Mitsubishi. Electronics saw Panasonic's $200 million smart appliance plant, aiding clusters but still with low local sourcing at 37% for Japanese ops.Stats SnapshotJapan ranks third in Vietnam FDI with $79.4 billion across 5,600+ projects, mostly processing/manufacturing. January 2025 alone brought $600 million, up 665% YoY; cumulative auto/electronics focus employs thousands via parks like Thăng Long. Local procurement lags Thailand/China, but 86% of firms aim to grow it.Vietnam's Policy BackboneVietnam’s manufacturing rise was policy-driven, but Peter Ryder warns US tariffs risk 30% GDP-linked exports, threatening 8% growth targets, industrial leasing, foreign investment, and real estate expansion. Eco-industrial parks offer CIT cuts to 10% for 15 years in high-tech zones, plus land waivers; JICA ODA ($23.5B since '92) built metros/ports, enabling clusters. This combo stabilized sub-sectors like auto parts, where Japan helped Tier 1 suppliers emerge amid Doi Moi reforms.
China drives rapid expansion and rising costs
China’s role in Vietnam’s manufacturing boom has grown rapidly, especially in the last decade. Chinese companies are now among the most numerous new entrants into Vietnam’s industrial zones, particularly in electronics, machinery, and component sub-assemblies.Vietnam’s imports from China reached roughly $168 billion through November 2025, nearly 30 percent higher than the previous year and already above full-year 2024 levels. One-third of these imports were electronic parts, many of which are assembled in Vietnam and re-exported to markets like the U.S. and Europe.Chinese firms are also shaping competitive pressures. In industrial hubs such as Bac Ninh, competition for labour has pushed wages up by an estimated 10–15 percent since 2024, according to local industry reporting. This cost pressure affects the broader manufacturing ecosystem, forcing firms to consider automation, efficiency gains, or geographic diversification.China continues to shape regional supply-chain configurations by occupying upstream positions within China–ASEAN value chains. As labor-intensive manufacturing relocates to Vietnam and other ASEAN economies, China retains higher value-added production of intermediate inputs, reinforcing its influence through component sourcing and value capture rather than capital deployment alone.
Who is really driving the boom?
Vietnam’s manufacturing boom is shaped by the interplay among South Korea, Japan, and China rather than by any single country. South Korean firms bring large-scale investment and global market access, but their reliance on Vietnamese production gives Vietnam leverage in negotiations over incentives and labor conditions. Japanese investors raise quality and supply-chain standards, creating pressure for local firms to upgrade while benefiting from Vietnam’s cost-competitive base. China drives volume and provides essential inputs, but overreliance can expose Vietnam to supply shocks, giving policymakers and domestic firms strategic influence to diversify sources. Vietnam’s growth emerges from actively managing these relationships, capturing value across production, standards, and market integration.