I have no idea what happened to IMO SABA but Kabu is now the place to go. Although their player base seems to be smaller compared to Umeboshi a few years ago.
I've been playing for a long time but was forced to quit when Prince Umeboshi closed down and IMO Saba took its place. The person who runs IMO should be no stranger to regular Umeboshi players, being that one moderator who always uncannily ranks top of every match.
Since he was admin of IMO, everything went downhill fast when he started dishing out bans if he "didn't like you" as evident with the drama on Twitter or IRC, or if he suspected you were a dirty foreigner. Speaking English in chat would get you kickbanned in quick order if he was in the mood.
Hostile environment, bad ssm, sanctioned cheating, nonsense drama. Needless to say, less and less people started showing up, game times decreased from 2+ hours to 1, and he was still cheating the game to death with 20-30 players.
Finally came the ping limit set at <150ms to keep the foreigners out.
Thanks for telling us about the new server. I hope FHSW grows from now on, seeing how there's a new Chinese server.