Consumer prices excluding fresh food declined 0.2 percent from a year earlier.
The energy costs, increased 0.7 percentage point in January over a month earlier to 4.7 percent.
In the Tokyo Metropolitan area specifically, energy costs jumped 1.4 percent in February, although the pace had slowed from the 2.8 percent on year leap logged in January.
Meanwhile, Tokyo's core CPI fell 0.4 percent on year in February, for the 22nd straight year-on-year drop, with the pace of decline accelerating from the 0.2 percent fall booked in January.
Consumer prices in the Tokyo Metropolitan area are largely seen as precursor of prices across the country and Japan's central bank pays particular attention to this leading indicator.