Regarding the April 12 article "American termites infesting Japan, exterminators warn": If they are the kind of termite found in California, you can't get rid of them by just spraying. In bad cases, in addition to drilling into the underground nest and drilling into the wood frame work to pump in poison, the house has to be evacuated, covered and sealed inside a big plastic tent and then have a poisonous gas pumped in and then you have to wait for them to die. In certain U.S. states, builders will poison the land to kill the termites before building.
douglas chandler