Sportscaster Kimiko Jinnai and her fiance captured a knife-wielding burglar early Tuesday in her condominium in Minato Ward, Tokyo, police said.
Police arrested Takayasu Nagasaki, 42, after Jinnai, a 37-year-old former Olympian, and Akihito Kaneishi, a 40-year-old former pro baseball player, caught the intruder at about 12:30 a.m., they said.
Jinnai suffered a minor cut to her right hand during the scuffle, police said.
Nagasaki allegedly entered with a duplicate key he had made while doing interior finishing work on the condo, police said.
Police quoted Nagasaki as saying he owed a consumer credit company about 1.75 million yen.
Jinnai said she was fortunate she was with her fiance at the time.
She participated in the 1992 Olympic Games in Barcelona as a badminton player. Since retiring in 1993, she has become a sportscaster and TV personality. Kaneishi, a former pitcher with the Hiroshima Carp and Nippon Ham Fighters, is a sports commentator.
They were engaged in January and plan to marry in August.