When Erin and Munekazu Tanikawa moved into a newly built condo in Inzai, a suburban community east of Tokyo in December 2022, they envisioned an ideal life with a sweeping view from their balcony and easy access to both nature and central Tokyo.

They knew that something would be eventually built on the parking lot next to the condo, just a five-minute walk from the nearest train station, but assumed it would be something like a community center or a supermarket.

So they were in for a huge surprise in April last year when they spotted a notice stating the plot would be turned into a 52-meter-tall data center, which, if completed as planned, would tower over their own 15-story building.