Yes, there is. There is the "Alternative Dispute Resolution System". "The Alternative Dispute Resolution (ADR) system is a method of resolving disputes without going through court proceedings. ADR for real estate aims to resolve real estate disputes based on the free will and efforts of the parties involved.
Specifically, the Japan Real Estate Arbitration Agency, an Alternative Dispute Resolution (ADR) organization certified by the Minister of Justice, is a private-sector ADR organization formed by a network of lawyers and professional organizations in various fields related to real estate distribution nationwide.