Victoria Nuland in 2013: "We have invested over $5 billion to assist Ukraine..."

[reorg]

60. that's actually an interesting question

Japan and Germany are so-called "enemy states" mentioned in the UN Charter, which means that a UNSC resolution is not needed if any signee of the Charter, e.g. the US considers to take action against them. IOW it would be completely in line with the UN Charter if the US prevent a "reneal of aggressive policy" by Japan or Germany, say by way of taking control of the area where their military bases are located if and when the enemy states might want to throw them out.

Article 53

1. The Security Council shall, where appropriate, utilize such regional arrangements or agencies for enforcement action under its authority. But no enforcement action shall be taken under regional arrangements or by regional agencies without the authorization of the Security Council, with the exception of measures against any enemy state, as defined in paragraph 2 of this Article, provided for pursuant to Article 107 or in regional arrangements directed against renewal of aggressive policy on the part of any such state, until such time as the Organization may, on request of the Governments concerned, be charged with the responsibility for preventing further aggression by such a state.

2. The term enemy state as used in paragraph 1 of this Article applies to any state which during the Second World War has been an enemy of any signatory of the present Charter.

http://www.un.org/en/documents/charter/chapter8.shtml

Another interesting aspect is your term "lease". As the Süddeutsche Zeitung informed its readers a while ago, the German government pays for about two thirds of all construction costs incurred by the American bases and a variety of other costs. They say Germany paid about 1 billion Euro in the last 10 years alone, while the 40,000 troops stationed here don't pay any taxes.

For the first 10 years, Germany had to pay for everything (4.5 billion DM yearly). After that, German had to pay part of the costs due to the NATO contract, and some murky agreements made in 1975. The used areas (with fences around them) are not "leased" by the US military, they are free: 53,870 ha (5798518541.4815 sq ft), 24,226 apartments.