The Ariake Arena was officially completed on Monday (December 9), while construction on the Aquatics Centre is expected to conclude at the end of February.

Both venues were previewed last month as the construction process draws to a conclusion.

The Ariake Arena will host volleyball competition during next year's Olympic Games, before serving as the wheelchair basketball venue for the Paralympic Games.

TMG has confirmed the venue will officially open on February 2, with demonstrations of both sports set to feature at the ceremony.

A greeting from officials and special guests will open the event, while a small concert featuring members of groups TEAM BEYOND and AKB48 Team 8 will be held.

Tours of the venue will take place during the event, which is open to Tokyo residents.

Members of the public wishing to attend will have to apply in advance.

Temporary overlay work is scheduled following the event, during which time the facility will not be open to public use.

The venue, located in the Tokyo Bay Zone with the Athletes' Village and Main Press Centre nearby, will become a sporting and cultural centre following the Games.

Concerts are among the activities expected to take place in the venue.

The Tokyo Aquatics Centre is scheduled to have its grand opening on March 22, with details of the event expected to be confirmed shortly.

Overlay work will take place from March 10, during which time the facility will not be open to use by Tokyo residents in principle.

Applications can be made to use the venue on the condition they do not interfere with preparations for the Games.

Priority will be given to international, national and Tokyo metropolitan competitions.

The Tokyo Aquatics Centre is set to be the final permanent venue to be completed.

Construction will conclude in February, with the Tokyo Metropolitan Government overseeing the process.

The Aquatics Centre is expected to cost ¥56.7 billion (£403 million/$523 million/€471 million).

The 15,000-capacity venue will feature a 50 metres pool during the Olympic and Paralympic Games.

A moveable wall ensures it can be converted into two 25m pools.

Artistic swimming, diving and swimming competitions will take place at the facility, which will be one of the landmark venues of the Games.

The venue is due to host a Tokyo 2020 test event on April 14 and 15.

The Aquatics Centre is expected to hold international and national swimming events following the Games.