A Japanese woman has become the first 100-year-old to complete a 1,500m freestyle swim in a 25m pool, SIA informs citing the BBC.
Mieko Nagaoka, who only took up swimming at the age of 82, already holds the record in her age category for the same distance in a 50m pool.
She completed the latest feat in just over one hour and 15 minutes, using backstroke all the way.
She was the only person taking part in her age range - 100 to 104 - at the competition in Matsuyama on Saturday.
Nagaoka already dominates the world record board for her age group, as awarded by the international swimming federation (Fina), holding 24 titles over both short and long distances.
Her latest achievement is now expected to be recognised by Guinness World Records.
Nagaoka began swimming as therapy for her knees, but was soon training several times a week. She has since attended swimming competitions around the world, and said her family are also swimmers.