TOKYO, Dec 4 (Reuters) - Even as cost-push factors boost inflation, global central banks must be vigilant to the risk of "Japanification", in which their economies face prolonged low inflation and stagnation, said Bank of Japan (BOJ) Deputy Governor Masazumi Wakatabe.
Various structural factors could weigh on the neutral rate, or the rate at which monetary policy is neither stimulating nor restricting growth, across the globe, he said.
"What Japan's long experience with deflation shows is that it's quite hard to eradicate fears of deflation," said Wakatabe, who is known as a vocal advocate of aggressive monetary easing.
It continues to maintain ultra-low rates, even as rising raw material costs push inflation above the target.
Wakatabe, whose five-year term as deputy governor ends in March, has consistently stressed the need to keep monetary policy ultra-loose to put a sustained end to deflation.