Kapishina made her Olympic debut at the 2004 Athens Olympics, competing in a breaststroke double. In the 100 m breaststroke, she won the second heat by approximately two seconds ahead of Cuba's Imaday Nuñez Gonzalez in 1:10.66. Her storming victory in the heats missed out a spot in the semifinals, as she finished eighteenth overall by a third of a second (0.33) outside the top-16 field. In her second event, 200 m breaststroke, Kapishina secured a penultimate seed to round out the semifinal roster with a prelims time of 2:31.26, but was eventually disqualified for not following the proper form.