The Japan Sport Council on Monday unveiled two new stadium designs for the 2020 Tokyo Olympics that blend in better with the greenery-rich Yoyogi area and currently don't break the ¥155 billion budget.

"Both designs use wood in their construction materials, and I think that's an interesting aspect" of the technical proposals on the council's website, said architect and critic Takashi Moriyama.

"I think the idea of using wood in large structures may globally impact architecture," he said.