W350 Project

The W350 Project is a skyscraper proposal in Tokyo, Japan, planned to reach around 350 meters in height with 70 floors. The building will be made mostly of timber, with steel for stability against wind and earthquakes, and will contain apartments, offices, and shops.

The design was created to celebrate the 350th anniversary of Sumitomo Forestry, a company with a long history in timber construction. Building work is expected to start in 2024, with completion planned for around 2041.

The name W350 refers to the planned height and the 350th anniversary of the company planning the project. Visitors will see much wood on outer surfaces and balconies designed with plants, bringing a forest-like feeling into the city.

The site is only a plan and not yet built, so there are no opening hours or direct visiting options. Those interested can check online for progress or design details when information is released by the planners.

The project will need about 185,000 cubic meters of timber, mostly cedars and cypresses planted after the Second World War that are now mature enough for construction. The cost is estimated at around 5.6 billion dollars because building tall with wood is still a new technology that needs more development.

Location: Tokyo

GPS coordinates: 35.65279,139.83944

Latest update: December 4, 2025 15:05