Rot -13 gives a valid word for the keyword portion, don’t forget to do the same operation on the numbers

rvg72stone543rp

The word is referring to the Shonin stones

rvg72shonin543rp

Let’s try splitting into the passcode format assuming that numbers are 2 letter words

piw ep rj mvljmptt si ep ep un

ep is repeating exactly where numbers should fall, we are on the right track. One way to convert ep to a valid number is by alternating Rot -1 & +1

-+- +- +- +-+-+-+- +- +- +- +-
ojv fo si numinous th fo fo vm

ojv46numinous344vm