TOKYO—A Belarus track sprinter alleged her Olympic team tried to remove her from Japan in a dispute that led to a standoff Sunday evening at Tokyo’s main airport. An activist group supporting Krystsina Tsimanouskaya said she believed her life was in danger in Belarus and would seek asylum with the Austrian embassy in Tokyo. Tsimanouskaya said in a filmed message distributed on social media that she was pressured by Belarus team officials and asked the International Olympic Committee (IOC) for help. “I was put under pressure and they are trying to forcibly take me out of the country without my consent,” the 24-year-old runner said. Tsimanouskaya, who is due to run in the Olympic 200-meter heats Monday, criticized Belarus team officials on her Instagram account. She said she’d been put in the 4×400 relay despite never racing the event. The Belarusian Sport Solidarity Foundation said government supporters targeted the athlete, …