The Asian Games began in Japan on Thursday with Qatar beating Iran in men's basketball, the first action in the continental multi-sport showpiece that has more participants than the Olympics.
Over 17,000 athletes and officials are expected to take part in 43 sports at the Nagoya-Aichi Games, which do not officially start until the opening ceremony on September 19 and will run until October 4.
Several events such as basketball, football, cricket, hockey and modern pentathlon will get under way before the opening ceremony.
Qatar held off a comeback from Iran to win their Group B encounter 59-35 at the Aichi International Arena in Nagoya in the first match of a men's basketball competition that will hold medal finals on September 20, the day after the opening ceremony.
"We know we need to win at least one game so we can qualify for the next round," said Qatar's Michael Lewis, the United States-born player who scored a game-high 21 points.
"Feels good to get some team camaraderie back, and now we have got to keep going."
Later in Group B, Taiwan beat Jordan 83-80.
Los Angeles 2028 Olympics qualifying spots are up for grabs in several sports at the Asian Games, which are returning to Japan for the first time since 1994.
Organisers hope the athletes will have a "unique experience" staying in accommodation ranging from a cruise liner and wooden containers to standard hotel rooms.
10,000 police officers for security
Officials are confident that the plan will not be affected by Japan's typhoon season, which is usually in full swing in September-October.
Weather has already caused disruptions, with record rainfall on Tuesday forcing hundreds of athletes briefly to evacuate their accommodation.
Rainwater also leaked into some competition venues, with more wet weather forecast for the coming days.
Among those in action at the Games will be Philippine tennis sensation Alexandra Eala and a pair of world-class teenage talents in 15-year-old Indian cricketer Vaibhav Sooryavanshi and 13-year-old Chinese swimmer Yu Zidi.
Meanwhile, Japan will deploy around 10,000 police officers for security at the opening ceremony of the Asian Games next week in the city of Nagoya, local media reported.
The ceremony will be attended by Emperor Naruhito and Empress Masako, among others, but Prime Minister Sanae Takaichi is not expected to take part.
Of the roughly 10,000 officers, some 3,100 will be specially dispatched squads from police forces nationwide, the National Police Agency said, adding it will also use artificial intelligence for security efforts.
Areas within roughly 1 kilometre of the ceremony site and the imperial couple's accommodation will be designated as no-fly zones for drones under a recently promulgated law that imposed tougher regulations on small, unmanned aircraft flights.
It will be the first application of the revised law for an event attended by the emperor.
