various forms of sandhi exist; the japanese term for sandhi generally is , while sandhi in japanese specifically is called . most commonly, a terminal on one morpheme results in or being added to the start of the next morpheme, as in , (ten + ō = tennō). in some cases, such as this example, the sound change is used in writing as well, and is considered the usual pronunciation, though in other cases, such as abbreviating to ("-nchi") this is only done in speech, and considered informal. see ("in japanese") for further examples.