According to Official Guinness Records,
The most backwards skips over a rope in 30 seconds is 148, achieved by Yu Okamoto (Japan) in Hino, Tokyo, Japan, on 4 November 2017.Yu Okamoto is also the current record holder of the most backwards skips over a rope in one minute.
For a complete list of 2017 records, please visit 2017 Guinness Records in Japan.