The key gauge of the current state of Japan's economy fell below the boom-or-bust line of 50 percent in December, following a reading of 60 percent in November, the government said Friday.
The index of coincident economic indicators stood at 33.3 percent, the Cabinet Office said in a preliminary report, citing weak production amid lingering adjustments in the information-technology sector, particularly electronics parts and devices.
A reading above 50 percent is considered a sign of economic expansion. A figure below this line is seen as a sign of contraction.
"The index of coincident economic indicators is weakening and it requires close monitoring," a Cabinet Office official said, leaving the government assessment unchanged from the previous month.