The blueprint for Toyota's Czech plant was simple enough: expand production, build more cars in Europe, sell more cars to Europeans. Then Brussels picked up its pen — and the Japanese automaker's growth story acquired a very European asterisk.

The EU's 'Made in Europe' plan has unnerved global auto suppliers, and its core is blunt: under the new rules, only electric vehicles manufactured in the EU will be eligible for subsidies and public procurement. Cars imported from Japan would not qualify at all — and Japanese automakers, as reported in late October, fear the new regulations will hit them hard.

Yet the sharper edge sits in the fine print. Models built in France, Portugal and Eastern Europe would benefit only if enough of their parts come from Europe. Assembly on EU soil, in other words, is necessary but not sufficient: the supply chain behind the car must itself prove European enough to pass the test.

That is precisely where Toyota's Czech expansion meets its moment of truth. A Japanese manufacturer producing in the heart of Europe now faces a question its procurement teams must answer before subsidies — and access to public procurement — unlock: how much of a Czech-built car can be traced back to European parts?