Japan actually made things. They didn't get an inflationary brainstorm that they could instead live off of the proceeds of counterfeiting until their bubble in the late 1980s. Their economy has not grown since. Inflation and devaluation accomplish nothing, except to protect the connected, allow them to loot others, and avoid the efficiency and discipline of actually investing capital only in worthwhile ways.
I don't understand why you are so negative. Its not your currency. Is it just out of spite? You can say what you want, but almost 4 years of only positive results and sustained growth rates makes the case. The US dollar, by the way, is being steadily devalued. The EU is now worth more then the dollar, by almost 10%.