How do i reserve a Minshuku at Shirakawa-go?

I have tried searching for availability for Minshuku at Shirakawa-go and almost all of the accomodation do not accept solo traveller or the accomodation website is completely in japanese. Any advice or recommendation for this would be highly appreciated!

https://www.japaneseguesthouses.com/ryokan-search-results/Shirakawa-go...

Or you can check via Shirakawago Tourist Association

https://www6.489pro.com/asp/g/c/calendar.asp?kid=00156&lan=

This is only in Japanese. Their English site is not so convenient when checking vacant rooms.

Note that most of the accommodations are small family-run minshuku and very popular so you must be patient to search vacant rooms.