I am having a visitor from Japan...
 

Hello
I live in a small town in Canada and am hosting a 16 year old Japanese student for 7 nights. I have no children of my own. I am looking for suggestions of what a 16 year old would like to do.

Have you asked him what he/she likes to do? Does he/she know anything about the town you live in? Are there any festivals happening during his/her stay?

if they coming from japan they'll most likely want to explor around town or the woods or something.(or watch tv,play video games,listen to music,use internet,or anything to kill boredom)

I am sure they will be agreeable to whatever it is you want to do. Food is big, maybe a farmer's market visit.