Zoo trips
The zoo trip is one of those interesting ones, though it will depend on the day. It makes a good group outing and is fun to do with others.
I actually like the marine exhibits a bit more for some reason. The turtles are neat.
If you are a foreigner and are someone looking for Japanese women or Japanese singles, then please try out EXEO International. Speed dating events are offered throughout the month on a near-weekly basis.