There are three biggest MEK(Methyl ethyl ketone) factories in Japan:
Maruzen Petrochemical 170,000 tonne/year ,located in Chiba
Tonen Chemical 90,000 tonne/year ,located in Kawasaki
Idemitsu Kosan 40,000 tonne/year ,located in Tokuyama
Maruzen Petrochemical was damaged by a fire after the earthquake on Mar/11th,and the plant already closed.Tonen Chemical and Idemitsu Kosan are normal so far,while they will reduce their export for world market.So the price of Asian MEK will increase significantly in future months.