bond yields so different yet low

[LibForestPaul]

10 jap bond = .25 %
10 euro bond = .02 %
10 us bond = 2.25 %
10 gb bond = 2%?

us bond is orders of magnitude higher than Japanese and Euro bond, why?
why is us and uk so close with yield?
why is euro and dollar on par now, yet pound and dollar not?
Yet Euro is cheaper to borrow money?

 

[chronicaust]

I'd say since a higher interest rate means either A) A riskier investment or B) A larger need by the Government to borrow money, the government is borrowing a lot of money.