Sesakanala is a planet within Zalaagra's domain, where Valcen spent several centuries of his life prior to involving himself in the problems on Nekenalos. It's name is derived from sesaka (mystery) and nala (earth), thus roughly translating to 'mysterious ground'.
Not much is canonically known about the cultures on Sesakanala, although fragmented reference occasionally surface in A Thread Between The Stars. One of these references is a proverb that Ne͡ivat'va recalls shortly after being let out of her cell and before meeting Terenyira for a formal conversation:
Beware the author of vague invitations – for her beckon may be one to your undoing.Sesakanalan proverb, not further attributed1)