If the products in question are being imported, an injunction to have customs stop importation of the infringing products may be filed in accordance with the Customs Tariff Law.
If the infringer agrees to negotiate a settlement after receiving the warning letter, it is much less expensive than taking the case to the court. In addition to courts, disputes can be arbitrated by the Arbitration Center for Industrial Property, which was jointly established by the Japanese Bar Association and the Japan Patent Attorneys Association.