Japanese firms are among the largest foreign investors in both Thailand and Vietnam — and many Japanese groups with a plant in Thailand or China now ask: is Vietnam the right “second base”? The answer differs from Chinese firms’: the Japanese aren’t chasing US tariffs but long-term risk management (earthquakes, floods, geopolitics) and market strategy. This article examines when Vietnam is the right second base for a Japanese firm already footed in Thailand/China — and when it isn’t.
What drives Japanese “second base” decisions
Unlike the Chinese China + 1 wave (tariff-driven), Japanese firms open second bases for four motives: (1) De-concentration risk: the lessons of the 2011 Tohoku earthquake (paralysed supply chains) and the 2011 Thai floods (industrial parks submerged, heavy Japanese losses) — an obsession with “not all eggs in one basket”. (2) Geopolitics: fluctuating China–Japan relations push firms to reduce China dependence for critical steps. (3) The Vietnam market: 100 million people, a fast-rising middle class — both a production base and a market. (4) Cost: Thai wages are already high (nearly double Vietnam’s for many roles), China’s higher still — Vietnam rebalances system-wide cost.
Scenario 1: plant in Thailand → add Vietnam
The most common scenario. Thailand is Japan’s ASEAN manufacturing headquarters (autos, electronics); Vietnam becomes the second base. Sensible when: (1) splitting natural-disaster risk (Thai floods vs Vietnamese typhoons — uncorrelated risks, which is the point of diversification); (2) needing a low-cost base for labour-intensive steps while keeping high-tech steps in Thailand; (3) wanting Vietnam-market access (Vietnamese-made goods sold domestically avoid import duty). Not sensible when: the product needs Thailand’s complete auto cluster — splitting to Vietnam while importing components back from Thailand means logistics eats the benefit; or scale is too small for two plants (each needs minimum efficient scale). The winning model: Thailand = engineering hub + premium products; Vietnam = mass production + domestic market — clear roles, no internal competition.
Scenario 2: plant in China → add Vietnam
Japanese firms in China face geopolitical risk + soaring costs. Vietnam becomes the second base for Japanese-style “China + 1”. Sensible when: (1) global customers (especially American) demand lower China weight in the chain; (2) needing a backup copy of the Chinese plant — same product, two sources; (3) wanting to retain Chinese engineers (training Vietnamese engineers via experts from the China plant — internal knowledge transfer). Not sensible when: the product wholly depends on Chinese clusters (moving to Vietnam with 90% of components still from China adds logistics without truly cutting risk); or the main market is China — building in Vietnam then re-exporting into China is a losing equation. Special note: moving from China to Vietnam demands bigger cultural management than Thailand-to-Vietnam — expectations on discipline, quality and work style differ markedly between Chinese and Vietnamese workers.
Four preconditions for a second base
(1) Sufficient scale. Both plants must each reach minimum efficient scale — if total output barely feeds one-and-a-half plants, a second base just fragments efficiency. (2) Clear role-split. Write the role matrix: which plant makes what, for which market, which steps — avoid overlap that breeds internal competition and waste. (3) Relatively independent supply chains. The second base needs its own sources (at least for critical components) — if both plants depend on one Chinese supplier, diversification is cosmetic. (4) Management team. The Japanese say “hito wa takara” (people are treasure) — the second base needs a plant director and managers trained at the first base, seconded for 2–3 years. No people, no plant.
The realistic roadmap: decision to production
Japanese groups’ experience: months 1–3: surveys, park selection (prefer parks with many Japanese firms — Japanese clusters in Bac Ninh, Hai Phong and Dong Nai ease hiring and supplier discovery); months 4–6: IRC procedures under Investment Law 143/2025, land/factory leasing; months 7–12: construction/fit-out, hiring and training (sending workers to the parent plant for 3–6 months’ training is the Japanese standard); year 2: trial production, customer quality certification; year 3: full operation. Total: 2–3 years from decision to stable operation — Japanese firms don’t rush, which is why their success rate beats the average.
Risks that get underestimated
(1) “Second-base syndrome”: leadership lavishes attention on the new base and neglects the old one — both decline. (2) Internal competition: two plants fighting over orders, talent and capex — needs a group-level role mechanism, not two directors negotiating. (3) Technology leakage: a new base means more people knowing the secrets — tighter controls, especially when hiring from competitors. (4) Diversification illusion: two plants but one critical-component supplier and one big customer — real risk unchanged, only management cost up. Final check: draw the risk map — list the current base’s five biggest risks, and mark which the second base truly eliminates. If fewer than 3/5, reconsider.
The Japanese playbook — why their second bases succeed more often
Japanese second bases outperform the regional average for structural reasons worth copying: (1) patient capital — Japanese headquarters fund the 2–3-year ramp without demanding year-one profits, so the plant is built right rather than built fast; (2) the expatriate bridge — 10–20 Japanese managers embedded for years transfer not just technology but management DNA (quality circles, kaizen, preventive maintenance), which is the actual competitive advantage; (3) supplier co-migration — Japanese assemblers bring 5–10 key suppliers with them, so the new base inherits a functioning supply chain on day one instead of building one from zero; (4) the customer anchor — the second base usually starts with committed orders from existing customers, not speculative capacity. Chinese investors can replicate all four: budget the full ramp period, second your best managers (not your most available), invite key suppliers to co-locate, and secure offtake before breaking ground. The lesson isn’t “be Japanese” — it’s that second bases fail from rushing, not from planning, and the firms that plan in years, not quarters, are the ones still operating a decade later.
Checklist: Japanese firm opening a second base in Vietnam
1. Name the motive: risk, cost, market or geopolitics — each motive needs a different design. 2. Check scale: does total output feed two efficient plants? 3. Write the role matrix: which plant does what, for whom — no overlap. 4. Assess supply-chain independence: does the new base have its own critical-component sources? 5. Prepare the team: director and managers trained at the first base. 6. Choose the park: prefer Japanese clusters. 7. Plan 2–3 years: never force a “6-month” rush. 8. Group-level governance for two plants — no internal competition. 9. Technology controls for the new base. 10. Draw the risk map: how many real risks does the second base eliminate? 11. Review after 3 years: did the second base meet its original goals? 12. Copy the playbook: patient capital, expatriate bridge, supplier co-migration, customer anchor. Start supplier conversations early — the best suppliers commit capacity a year ahead.
Contact us
FLAT Law Firm advises Chinese investors in Vietnam across the full lifecycle: investment structuring, IRC/ERC procedures, tax, labour, intellectual property and dispute resolution. Contact us for advice tailored to your case.
This article has been quality-reviewed by the FLAW AI Legal Council