Kumamoto’s New Wastewater Plan to Safeguard Water and Boost Economy

Kumamoto, a prefecture located on Japan's southernmost main island of Kyushu, is embarking on a significant development plan that addresses both environmental and economic objectives. The town of Kikuyo, within the prefecture, will be the site for a new facility and wastewater pipes aimed at ensuring water safety. This initiative is in response to concerns raised by residents about potential water contamination due to the presence of Taiwan Semiconductor Manufacturing Co. (TSMC), which operates a major semiconductor fabrication facility in the region.

Governor Takashi Kimura is spearheading the development plan to mitigate these concerns while securing the economic benefits expected from TSMC's operations. The plan includes constructing new facilities and specialized wastewater pipes to treat effluent from semiconductor production. Governor Kimura emphasized the importance of this initiative, stating:

"We are planning a sewage treatment plant that specializes in treating wastewater from semiconductor factories."

TSMC, a global leader in semiconductor manufacturing, began mass production at its first Kumamoto plant in December 2024. This facility is anticipated to become a central hub for chip production, significantly impacting the local economy. Projections estimate an economic impact of approximately 13.4 trillion yen ($88 billion), highlighting the substantial financial benefits this development could bring to the region.

The introduction of these facilities aims not only to protect the water quality but also to bolster community confidence in the sustainability of TSMC's operations. By addressing environmental concerns proactively, Kumamoto's administration seeks to harmonize industrial progress with ecological preservation.

Beyond addressing environmental issues, TSMC's presence is expected to transform Kumamoto into an essential node in the global semiconductor supply chain. The anticipated economic boost is poised to enhance regional development, create job opportunities, and foster technological advancement.