...+ Toshiba has revised upward the fiscal 2015 earnings guidance it announced in February. The revised guidance leads us to expect the company's debt and shareholders' equity will worsen less than we had assumed. + However, uncertainties remain regarding Toshiba's fiscal 2015 earnings performance and many ambiguities linger in determining the degree to which the company's performance will recover in and beyond fiscal 2016 and the likelihood that major banks will continue to support its liquidity. + We are keeping our 'B+' long-term corporate credit rating and '##' long-term senior unsecured debt rating on CreditWatch with negative implications. + We intend to resolve the CreditWatch within about a month of reviewing the company's fiscal 2015 earnings results, examining prospects of recovery in its earnings performance and financial standing in fiscal 2016, and confirming support likelihood from major banks. Any downgrade is likely to be limited to one notch. TOKYO (Standard & Poor's) April...