TOKYO -- The Nikkei Flash Japan Manufacturing Purchasing Managers' Index, or PMI, rose to a four-month high of 52.6 in September from 52.2 in August.
A reading above 50 signals an improvement, while one below 50 points to a contraction in activity.
"Firms signaled stronger expansions in both output and new orders amid reports of firmer demand both at home and abroad," said Annabel Fiddes, principal economist at IHS Markit, which compiles the survey.
The Flash PMI is based on around 85% of total PMI survey responses. The final September data will be published on October 2.
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