- S-win Swimming Group
- 8 hr 4 min 39.85 sec hour(s):minute(s):second(s)
- Japan (Saitama in Japan)
The fastest swim relay 1,000 x 50 metres is 8 hr 4 min 39.85 sec and was achieved by S-win Swimming Group (Japan) at Omiya Swimming School in Omiya, Saitama, Japan, on 4 October 2015.
Swimmers from multiple S-win swimming group schools came to Omiya swimming school to attempt the record.