The reading published by the industry ministry was weaker than the median forecast for a modest 0.1 per cent rise in a survey of economists by Bloomberg News.
In June, industrial production rose 1.1 per cent from May.
Production cutbacks in the electrical components and transport equipment industries led the decline in manufacturing, according to the government, as firms tried to cut down on an inventory buildup.
"Production is sluggish because private consumption and exports remain weak," Toru Suehiro, an economist at Mizuho Securities, told Bloomberg News.
Japan's overseas shipments have slowed, raising concerns about the fragile recovery in the world's number three economy as demand falls in neighbouring giant China.
China-bound shipments were off 1.3 per cent in July from 12 months earlier in volume terms, outstripping a 0.4 per cent fall to the rest of Asia.
Despite a recovery in the US economy, a slowdown in China - Asia's top economy and a major market for Japanese exporters - has raised a red flag.
Japan's economy contracted in the three months to June, boosting speculation the central bank will be forced to unleash more stimulus as Tokyo's "Abenomics" growth blitz stumbles.
But "the drop in industrial production in July suggests that economic activity will recover only slowly this quarter", Marcel Thieliant of Capital Economics said in a commentary.
Also today, a survey released with the production data showed that manufacturers expected output in September would fall 1.7 per cent after growth of 2.8 per cent in August.
However, Thieliant noted that firms tend to be "too optimistic" about future production.
