 The most familiar example as a counter is for counting months, as in ("ik-ka-getsu", one month [duration]) where it is pronounced "ka".Other common examples are places 　(~"-ka-sho)" and countries "(~-ka-koku").An example where it is pronounced as "ko" is when counting small objects, such as pieces of fruit or candy, where one may write ("ik-ko"), rather than the more formal ; this is particularly common in hand-written signs at shops, though is also common.