Fastest 100 km ultra distance (male)

According to Official Guinness Records,

The fastest 100 km ultra distance by a male athlete as sanctioned by the IAU (International Association of Ultrarunners) is 6 hours 9 minutes 14 seconds, achieved by Nao Kazami (Japan) at the Lake Saroma 100 km Ultramarathon in Kitami City, Japan, on 24 June 2018. Kazami bettered the iconic record of 6:10:20, set by Don Ritchie (UK) at the Crystal Palace athletic track in London, UK, on 28 October 1978.As of January 2015, the IAU no longer classifies World Best Performances by surface, creating a single combined list of fastest times.

For a complete list of 2018 records, please visit 2018 Guinness Records in Japan.

Related Images

Other Japan records that might interest you:

• Fastest road run 100 kilometres (male)
• Largest trading card mosaic (image)
• Most touches of a football with the soles in one minute
• Largest LED sculpture
• Most high fives given by a mascot in one minute
• Largest water surface projection
• Most pairs feeding each other simultaneously
• Largest display of origami citrus fruits
• Largest drink coaster mosaic (image)