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The G4 member states were:
The G4 (Group of Four) is an alliance among Brazil, Germany, India, and Japan for the purpose of supporting each other’s bid for permanent seats on the United Nations Security Council. Unlike the G8 (formerly known as G7), where the common denominator is the economy and long term political motives, the G4’s primary aim is the permanent member seats on the UN Security Council.
The UN currently has five permanent members with veto powers in the Security Council: The People’s Republic of China, France, Russia, the United Kingdom, and the United States. The G4 nations are regularly elected to two-year terms on the Security Council by their respective groups: in the 24-year period from 1987 to 2010, and India was elected for six terms, Japan for five terms, Brazil for four terms and Germany for three terms.
While almost all nations have agreed in principle that the UN needs a revamping which includes expansion, few countries are willing to talk about the exact time frame for such a reorganization. Also there has been discontent among the present permanent members regarding the inclusion of controversial nations or countries not supported by them. For instance, Japan’s bid is heavily opposed by the People’s Republic of China. At the same time Japan finds strong support from the USA  and the UK. 
Countries that strongly oppose the G4 countries’ bids have formed the Uniting for Consensus movement, or the Coffee Club, now compromising over 40 nations. The leaders of this group are Italy, South Korea, Mexico, Argentina and Pakistan. In East Asia, both China and South Korea heavily oppose Japan’s bid. In Europe, Italy, Spain and the Netherlands all oppose a seat for Germany. In Latin America, Argentina and Mexico are opposing a seat for Brazil. In South Asia, Pakistan is opposing India’s bid. Also important are historical political animosities toward certain G4 nations (see Japanese war crimes, Comfort women for Japan, and The Holocaust for Germany).
The G4 suggested that two African nations be included in the enlarged UNSC. In several conferences during the summer of 2005, the African Union was unable to agree on two nominees: Egypt, Nigeria and South Africa all lay claim to a permanent African UNSC seat. 
A UN General Assembly in September 2005 marked the 60th anniversary of the UN and the members were to decide on a number of necessary reforms—including the enlarged SC. However the unwillingness to find a negotiable position stopped even the most urgent reforms; the September 2005 General Assembly was a setback for the UN.
The G4 retain their goal of permanent UNSC membership for all four nations (plus two African nations). However, Japan announced in January 2006 that it would not support putting the G4 resolution back on the table and was working on a resolution of its own.