Japan's seasonally adjusted all-industry activity index slipped 1.8% month over month to 104.5 in January after a 0.6% rise in December 2017, data from the Ministry of Economy, Trade and Industry showed.

Construction industry activity improved 1.7% to 115.1, while industrial production and tertiary industry activity slipped 6.8% and 0.6% to 99.3 and 105.2, respectively.