Toshka (토슈카, Tosyuka) is the planet of Denma.
Toshuka is old English version's name.
Balak tells to Korah that he have something to share with him, and it's about what happened on here 5 years ago. Korah sees Balak's spicy past. And Balak annoys Korah by his memory.
The incident here is called the Toshka case. Balak gives this case file to Bishop Metuera.
The readers are speculates that Toshka case is assassinated of Mother Madonna in here, or conspired the her assassination in there.