Japan's Ministry of Economy, Trade and Industry (METI) has approved a change to the construction plan for TSMC's second fabrication plant in Kumamoto, Kyushu, permitting the facility to mass-produce chips on the 3-nanometer process node.

The amendment shifts the second Kumamoto fab from its earlier intended process technology to volume manufacturing at 3nm, according to the report from BigGo Finance. The approval marks the regulatory green light TSMC needed before it can install and operate advanced-node production lines at the site.

What does the approval change?

The decision concerns the plant's approved construction plan, the document METI uses to govern large-scale semiconductor investments in Japan. A plan change at this level signals two things:

• The second Kumamoto fab will serve volume production, not pilot or limited runs, of 3nm chips.
• TSMC intends to bring a more advanced process to Japan than earlier Japanese-based capacity offered.

For the Japanese supply base, the move puts a leading-edge logic node on domestic soil. For TSMC, it extends the Kumamoto cluster beyond the first fab's capabilities.

Why it matters for the supply chain

3nm capacity in Japan affects three groups directly:

• Japanese automotive and industrial customers, who gain a nearby source of advanced logic silicon.
• Equipment and materials suppliers around Kyushu, who stand to see demand tied to a more advanced process flow.
• Chip buyers globally, for whom Kumamoto adds leading-edge capacity outside Taiwan.

The Kumamoto expansion is one of the largest foreign semiconductor investments in Japan's current build-out cycle, and METI's plan approvals are the mechanism by which that build-out proceeds.

What comes next

With the plan change approved, the path clears for TSMC to configure the second fab's cleanroom and tool set for 3nm volume production. The report did not state a start date for mass production or a revised investment figure.

METI has now signed off on 3nm mass production at Kumamoto's second fab.