Help buying tickets as a foreigner

My family and I will be visiting Japan in June, and I was hoping to get tickets to the June 7th BoSJ final. I've seen that some shows have specialty tickets for foreigners, but this doesn't seem to be one of them. I've also looked at BuySumoTickets, but it seems like it may be pricier than other options. I am also unsure on what the different ticket options are between Royal Seat, Arena, and Stand A, B, and C (which I'm assuming are standing tickets, and would like to hopefully avoid.) Any guidance or advice would be greatly appreciated. Thank you!

by The_Sultan15