Best way to go to Gujo Hachiman Castle

Dear All,
I am planning go to Gujo Hachiman Castle in December 28th, kindly inform the best best way to get there.

I just read some information that Hachiman Castle close from December 20th to January 10th, is it true? ( the information as below )

Hours and Fees

Hours
9:00 to 17:00 (March to May and September to October)
8:00 to 18:00 (June to August)
9:00 to 16:30 (November to February)

Closed
December 20 to January 10


Best Regards,
Al Henry

Yes, it is true that the castle is closed during that period.

Access to the castle is explained here:
https://www.japan-guide.com/e/e5934.html#section_get_there

Thanks for your information.

Can I make day trip from Kanazawa to Takayama, is that possible? Tks