Article 9 is a model for achieving an international culture of peace and a model for all countries in order to reduce the threat of war.
Article 9 is Japanese's apology for its military imperialism towards the countries of asia. As such, eliminating it is tantamount to renouncing that apology.
Article 9 is effectively a rejection of the right to keep any military force or war potential whatsoever.
Article 9 is highly regarded abroad for its ability to check the possibility that Japanese could become a country that seeks after its own national interest by sword-rattling. To asian neighbors, the article is a symbol of what prevents Japanese from becoming a dangerous country.
Article 9 is, for the social democratic party, considered the best way to meet a continuing need to prevent Japanese from becoming involved in aggressive military activities.
Article 9 is actually two different versions: The english version that purports to prevent Japanese from rearming and insist on Japanese pacifism, and the Japanese version that is less absolute and imprecise.
Article 9 is, for Japanese nationalist groups, a shameful relic of the war, a badge of disgrace, a humiliation imposed by the war's victors, designed to hobble Japanese's international status permanently. In order to recover Japanese's full sovereignty and international prestige.