Industry officials see stocks worth 10 percent of the imports, or around 200,000 tonnes, as appropriate.
Following are details of Japanese aluminium stocks, including month-on-month and year-on-year comparisons (in tonnes):
Yokohama Nagoya Osaka Total
Sept 30 126,700 90,700 14,000 231,400
Aug 31 119,600 107,600 14,000 241,200
July 31 98,300 90,700 14,500 203,500
June 30 114,500 101,100 13,000 228,600
May 31 113,900 98,500 13,000 225,400 End-Sept 2010 114,200 104,200 12,000 230,400