TSMC to make advanced AI semiconductors in Japan

TSMC abroad and Taiwan’s “silicon shield”

• Many see advanced-node fabs in Japan/US as eroding Taiwan’s “silicon shield”: less dependence → less incentive to defend Taiwan.
• Others counter that dependence on a single, threatened geography is unsustainable; diversification was inevitable and is rational for TSMC and its customers.
• Some argue the move reduces near‑term invasion incentives: if TSMC can be replicated abroad, seizing Taiwan yields less strategic gain.

Why Taiwan matters (beyond chips)

• Several comments stress the US didn’t start defending Taiwan because of semiconductors; defense is about controlling the Western Pacific “front line” (Japan–Taiwan–Philippines) and sea lanes.
• Others argue US reliability has declined, pointing to recent US politics and saying historical commitments are a poor guide now.
• A view emerges that even if chip dependence fades, geography and alliance structure still give strong reasons to maintain the status quo.

Japan’s role and constitutional limits

• Speculation that Japan’s new leadership might edge toward a stronger security posture on Taiwan (up to mutual defense, nukes, etc.), but others call this unrealistic.
• Multiple replies emphasize Japan’s pacifist constitution, the difficulty of amending it (2/3 both houses + referendum), and current legal limits (can’t even sell arms to Taiwan).
• Japan’s policy already frames an attack on Taiwan as a potential “existential threat,” which could justify some level of involvement, but scope is unclear.

China, Taiwan, and conflict scenarios

• Strong disagreement on whether TSMC is central to Beijing’s calculus:
  • One camp: if TSMC didn’t exist, China might already have invaded.
  • Another: reunification is ideological/historical; chips are at most a minor factor.
• Broader debate on China’s record: some say China hasn’t bombed foreign soil in decades; others cite Tibet, the 1962 India war, Hong Kong pressure, South China Sea and border clashes as evidence it will use force when convenient.

Control over offshore fabs

• One side claims off‑Taiwan fabs don’t fully remove leverage: TSMC can withhold know‑how or personnel, and you can’t easily run a stolen fab.
• Others argue that once on US/Japanese soil, local governments will develop contingency plans, using incentives/coercion if needed to keep them running in a crisis.

Europe’s semiconductor position

• Thread notes Japan and US winning meaningful advanced-node TSMC capacity, while Europe gets limited, older-node volume.
• Long back‑and‑forth on why:
  • Claims of chronic underinvestment, fixation on offshoring, and internal EU politics blocking an “Airbus of chips.”
  • Recognition that Europe excels in tools (ASML) and mature nodes, but not leading-edge fabs.
  • Disagreement over whether a big, subsidized cutting-edge fab would be a strategic no‑brainer or an uneconomic “paperweight” without ecosystem and know‑how.
• Some argue only deeper EU integration and shared fiscal policy can fix this; others fiercely reject a more federal “US of Europe.”

Economic and industry angles

• Noted that current AI boom makes this the moment for TSMC to capture huge subsidies and lock in long‑term deals; fears that when Chinese tech progresses or AI cools, leverage will decline.
• Dispute over whether China’s catch‑up in semis/aviation is inevitable; one side points to talent scale and past acceleration, another to failure to reach the high end despite massive subsidies.
• Several comments see advanced‑node foundries, lithography, and similar chokepoints as being “weaponized,” ending the era of cheap computing and enabling outsized profits.

Other points

• Some question siting fabs in earthquake‑prone Japan; others reply that political stability and proximity to existing supply chains outweigh this risk.
• Brief note that Taiwanese sentiment toward Japan is generally positive, which some find historically surprising but comparable to other former adversaries reconciling.