Tokyo stocks plunged Monday with the Nikkei index ending at a roughly two-month low on a strong yen and growing concerns that Britain could vote to leave the European Union at an upcoming referendum next week. 
The 225-issue Nikkei Stock Average ended down 582.18 points, or 3.51%, from Friday at 16,019.18. The broader Topix index of all First Section issues on the Tokyo Stock Exchange finished 46.18 points, or 3.47%, lower at 1,284.54, according to Japan's (Kyodo) News Agency. 
Every industry category on the main section lost ground, led by mining, iron and steel as well as financial stock issues.