Construction work has progressed on schedule for venues of the 2020 Tokyo Olympics and Paralympic Games in Tokyo’s Koto and Edogawa wards on Feb. 6. (Video footage by Tatsuya Shimada)

Up to 20 percent of construction work has been completed as scheduled on four venues--with a total price tag of 130.5 billion yen ($1.2 billion)--for the 2020 Tokyo Olympics and Paralympics, officials said.

The four sites are: the Olympic Aquatics Center for swimming, diving and synchronized swimming (56.7 billion yen); the Sea Forest Waterway for canoe sprint and rowing (30.8 billion yen); the Ariake Arena for volleyball and wheelchair basketball (35.7 billion yen); and the Canoe Slalom Course (7.3 billion yen).

The Tokyo metropolitan government showed the progress of construction work to reporters on Feb. 6.

The Canoe Slalom Course is located in Edogawa Ward while the other three venues are being built in Koto Ward.

At the Olympic Aquatics Center, four 40-meter-tall pillars that will support the entire building have been erected. Parts of the roof are now evident.

This summer, the roof parts will be lifted a further 20 meters for installation to cover the building.

The four venues are expected to be completed in 2019, when test events will be held at the sites, according to a Tokyo metropolitan government official.

After the Olympics, the facilities will be open for use by the public.