Why would the Japanese care about US inflation? JGB rates are 0%. The yen has lost almost 40% of its value against the USD in the past 5 years. 4% USD yeild is fantastic for them.

02bcd3eeb0

In what way does 4% yield a better return than the inflation that is happening at 10%?

econ

Japan's central bank in its own grave

GhostofTruth

How does this help Japan? 
The US dollar inflation is like 10%. 
In what way does 4% yield a better return than the inflation that is happening at 10%? 
Im sorry, but your math isnt mathing.