The opposing party, the Constitutional Democratic Party of Japan, tends to concur with the LDP's interpretation. At the same time, both parties have advocated the revision of Article 9 by adding an extra clause explicitly authorizing the use of force for the purpose of self-defense against aggression directed against the Japanese nation. The Japan Socialist Party, on the other hand, had considered the Japan Self-Defense Forces (JSDF) as unconstitutional and advocated the full implementation of Article 9 through the demilitarization of Japan. When the party joined with the LDP to form a coalition government, it reversed its position and recognized the JSDF as a structure that was constitutional. The Japanese Communist Party considers the JSDF unconstitutional and has called for reorganization of Japanese defense policy to feature an armed militia.