Since 2010 they follow a zero rate policy. http://www.tradingeconomics.com/japan/interest-rate
There is no sign that it will change soon. That's why i'm basically .
Futhermore the YoY rate of increase in the CPI is likely to be about 0 pct for the next time.
Japan's debt problem is overwhelming, no sign of a trend change. http://www.tradingeconomics.com/japan/government-debt-to-gdp