...OVERVIEW + The JHF series 57 to 59 fixed-rate residential mortgage-secured pass-through notes are securitizations that JHF issued. A pool of residential mortgage loans ultimately backs the notes issued under each transaction. + We are affirming our '### (sf)' ratings on the notes following our review. + Because of the structural features of these transactions, we believe the ratings on the notes depend to an extent on the credit quality of JHF. TOKYO (Standard & Poor's) Jan. 23, 2015--Standard & Poor's Ratings Services today said that it has affirmed its '### (sf)' ratings on Japan Housing Finance Agency's (JHF) series 57 to 59 fixed-rate residential mortgage-secured pass-through notes (see list below). Today's affirmations reflect our views on the following: + We assume a cumulative default frequency for the residential mortgage loans currently outstanding of about 3%-4% under our base-case scenario, and about 28%-30% under a stress scenario commensurate with our '###' rating. These rates,...