The “W350” will be 350 meters (1,150 ft) high and have 70 stories. It will be constructed of 180,000 cubic meters of indigenous wood, combined with steel that will make up no more than 10% of the building’s construction.

The building will cost approximately US$5.6 billion (600 billion yen), roughly twice the amount of a conventional high-rise building would cost.

BBC:

Japan actually passed a law in 2010 requiring construction companies to use wood for public buildings that are below three storeys high.

It’s not a new concept worldwide either.

Wooden skyscrapers can be found across the globe, from an 18-storey office building in Minneapolis made from timber to a 53m-high block of student flats in Vancouver that currently holds the title of world’s tallest wooden skyscraper.

More:

World’s Tallest Wooden Building to Be Built in Tokyo – Brigit Katz, Smithsonian.com

World’s tallest wooden skyscraper planned in Tokyo – Holly Ellyatt, CNBC