TOKYO -- The Tokyo Olympics officially opened on the evening of July 23, after a year of delay due to the COVID-19 pandemic.
Despite various restrictions aimed at preventing the spread of the virus and lingering public concerns, a record 11,090 athletes from more than 200 countries and regions are taking part in an Olympiad unlike any in history.
Most of the 33 events -- the largest number ever -- will be held without spectators. Here is a look back at the opening day.
The Olympic clock in Tokyo counts down to the opening ceremony on July 23.
Police officers stand guard around the National Stadium.
People take photos in front of banners for the Tokyo 2020 Olympics.
People walk across the Shibuya scramble crossing in Tokyo.
The Blue Impulse, the aerobatic demonstration team of the Japan Air Self-Defense Force, performed a flyover during the 2020 Tokyo Olympics.
Empty seats dot the Olympic Stadium as part of COVID-19 precautions.
Fireworks rise above Tokyo's National Stadium during the opening ceremony.
People take photos in front of the Tokyo Olympics countdown clock at Tokyo station.
Performers spread across a stage during the opening ceremony.
Dignitaries including IOC President Thomas Bach, Japan's Emperor Naruhito, Japanese Prime Minister Yoshihide Suga and Tokyo Gov. Yuriko Koike watch the opening ceremony.
A performer runs on a treadmill during the opening ceremony.
Singer-songwriter Misia performs the Japanese national anthem.
Tap dancers dressed as carpenters perform during the opening ceremony.
Protesters face off with police officers outside the stadium.
A Japanese family watches the opening ceremony at home.
Drones fly over the stadium and spin as the Earth.
The Refugee Olympic team makes its entrance into the stadium.
The Indonesian delegation joins the procession of nations.
Athletes from Hong Kong take part in the opening ceremony.
Athletes from Myanmar join the procession of nations.
China's delegation is its biggest ever for an Olympics outside the country.
The U.S. Olympic squad numbers 558 athletes.
The largest-ever Japanese delegation represents the host nation.
Athletes converge at the opening ceremony around the official Olympic motto.
Performers enact themes of the Olympics during the opening ceremony.
Tennis star Naomi Osaka of Japan holds the Olympic torch at the stadium.
The Olympic cauldron is lit by Naomi Osaka during the opening ceremony.
The Olympic cauldron signifies the Games are officially underway.