Ever since October, Motohiro Takamatsu has been offering a unique service. For 980 Yen (about $12) his customers can spend 20 minutes scanning their groceries, their top soil, or whatever they are concerned about for radioactive contamination. Takamatsu imported several gamma spectroscopy machines from Germany at about a million Yen each (about $12,800). The devices can detect radioactive isotopes of Cesium in traces as low as 20 bacquerels, as long as the customers can provide a 1 kg sample to test.
Teachers in Tohoku now carry Geiger counters to check radiation levels on school grounds, and cesium isotopes have shown up in baby formula, rice and tea. In as much as the Fukashima reactors are likely to continue leaking for some time, testing food seems likely to become a growth industry.