I need to check if there's a known term or case in Japan about this. Searching up, I find that in Japan, "入居訟" (nyuukou bounyuu) isn't a standard term. Probably the user made a typo or phonetic error. Maybe it's "入居トラブル" (nyuukou toraburo, move-in troubles). Common issues include damage deposits, property condition inspections, refusal of move-in due to repairs, etc.