Consumer prices in the Tokyo region were up 1.3 percent on year in September, says rttnews.
That exceeded expectations for 1.1 percent and was up from 1.2 percent in August.
Core CPI, which excludes the costs of fresh food, advanced an annual 1.0 percent - also above expectations for 0.9 percent, which would have been unchanged.
On a monthly basis, overall Tokyo inflation was up 0.1 percent and core CPI was flat.