According to Official Guinness Records,
The fastest horizontal body roll was 5.91 seconds achieved by Yusuke Higashi (Japan) at Park Challenge / GWR Live! in Tokyo Midtown, Tokyo, Japan, on 1 May 2010. The attempt was part of a Guinness World Records live event at Tokyo Midtown.
For a complete list of 2010 records, please visit 2010 Guinness Records in Japan.