Japan's Water Woes: Chip Giant's Thirst vs. Farmer's Fields

In Kikuyo, Kumamoto Prefecture, Taiwan Semiconductor Manufacturing Co. (TSMC) operates a massive chipmaking facility, prompting discussions about the environmental costs of digital convenience. The region, known as the 'land of fire' and 'land of water,' relies heavily on groundwater, a resource crucial for semiconductor manufacturing.

TSMC's plant requires up to 30,000 metric tons of water daily. While 75% is recycled, the remaining 25% relies on Kumamoto's groundwater. In 2025, the company drew approximately 2.5 million tons of groundwater, a demand offset by local farmers. Since TSMC announced its construction plans in 2021, farmers in the Seta district have engaged in paddy flooding to recharge groundwater, a practice now mandated by revised prefectural guidelines requiring businesses to match their water usage.

These vital groundwater replenishment efforts are currently shouldered by farmers averaging 74 years old, who worry about the future viability of their work. The relationship between the economically beneficial TSMC and the water-providing farmers rests on a delicate balance.

With TSMC's second factory set to produce more advanced chips for AI data centers, water intake is projected to triple. TSMC aims for community integration, but farmers like Tomotsugu Segawa question how to protect farmland while ensuring groundwater creation, emphasizing the need for shared solutions for true coexistence.