Oh yeah and by the way, before going in to Japanese premier zone, i did ask Riot about if we could play in it and qualify into further tournaments. They basically said yes. I wrote a ticket. ( screenshot on my twitter acc https://x.com/consz9 )
My question: "Hello! We are a team residing in Mongolia and we were wondering if we could compete in Japan's Premier Zone (Contender League) and advance to Promotion/Relegation Tournament on august. We think that there might be a zone restriction because we're Mongolians. We have no issue playing on Tokyo servers. (we have 60-70ms which is optimal for us) Thank You!"
Their answer: Hello there,
Thanks for reaching out ot us!
You see, the choice of servers depends on your shard, and all possible servers are listed in the list of zones that are available for selection during the creation of the command.
And if this or that server is not on your shard, then selecting it will not work, there is no error.
Shard is the name of a specific set of servers, depending on your region.
I hope I have made this clear, but if you still have questions, let me know!