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Japan's coastguard said 13 crew members are missing on a 22-man fishing vessel after it collided with a much larger cargo ship off north-east Japan.
The 119-ton Horiei Maru and the 25,047-ton Nikkei Tiger collided about 900 kilometres east of Sendai.
An official at the Shiogama Coastguard office near Sendai said the smaller vessel may have sunk. Osamu Nishikawa said the coastguard sent two planes to look for survivors.
Nine of the fishing boat's crew were rescued. Five are Japanese and four are Indonesian.
Twelve of the missing are Japanese, and one is Indonesian.
