South Korea said Tuesday it has not been invited to participate in an international naval review set to be held in Japan next month, amid worsening bilateral ties.

Relations have deteriorated in recent months due to disputes over wartime history, which have led to a major trade dispute.

The South Korean defense ministry's press secretary said Seoul has not received a letter of invitation to the Oct. 14 event, organized by the Maritime Self-Defense Force in Sagami Bay, southwest of Tokyo.