いっぽん、 にほん。。。
one fan, two fans…
As fans are flat when open, one could expect them to be counted as まい. However, in Japanese the fan is seen as a slightly different sort of cultural object; when closed it is more like a stick, so the counter for fans is ほん. ほん is the counter also for umbrellas, for bottles, for trees, for a stick-looking object. The sound changes depending on the number of items, so take care.
いっぽんの せんす
one fan
にほんの せんす
two fans
さんぼんの せんす
three fans
add one more and we have:
よんほんの せんす
four fans
ごほんの せんす
five fans
and a sixer:
ろっぽんの せんす
six fans
add one more and we have:
Lami Japan 
