bonji ohara is a former navy captain with japan's maritime self-defense force. he says many sdf personnel experienced higher levels of stress during and after the missions than before because the reality was tougher than expected. >> the number of the ratio shows us the treatment was not enough. so medical training must be enhanced, strengthened. and also fundamentally they need the support from family members and also the japanese people. >> reporter: defense ministry officials say they will do all they can to find out why the suicides occurred and take steps to prevent them from happening in the future. keiko yamamoto, nhk world. >>> figures just out of the cabinet office give us a hint of how company managers view japan's economic prospects. ai uchida joins us from the business desk. you've been looking at the number numbers. what do they tell us? >> when managers feel more confident about the economy they reinvest in their businesses upgrade more equipment. when managers aren't feeling so confident they do put off these upgrades. machinery orders in april ro