Japan's industrial output in June fell a seasonally adjusted 3.3 percent from the previous month, The Japanese Economy, Trade and Industry Ministry said Wednesday.
The index of output at factories and mines stood at 96.7 against the base of 100 in 2010, said the ministry in a preliminary report.
It was the biggest fall since March 2011, when the earthquake took a heavy toll on factory lines and disrupted supply chains. The government also cut its assessment of output, saying it has " weakened."
By sector, output by transport equipment makers, including automakers, dropped 3.4 percent on month, while that in the information and communications equipment sector plunged 9.0 percent.
The index of industrial shipments was down 1.9 percent to 95.2 while that of inventories was up 1.9 percent at 110.5.