Yes, there is.
1.
(1) Cancelation 48 hours prior to tour or earlier : No charge
2.
(2) Cancelation 48 to 24 hours prior to tour : 30% of the tour fee
3.
(3) Cancelation less than 24 hours prior to tour, cancelation without notice : 100% of the tour fee
If the flight itself is canceled / delayed or the PCR test (antigen test) result is positive from the airport, no cancellation fee will be charged. In this case, please check this site.