Is there anything to do in Narita Airport? Will be transiting there for an hour.

Narita is great! You can eat very well -- some ramen maybe? Or take a shower. Or do some window shopping for electronics.
I always travel with kids, so I love the Sony play areas with free play stations.
I wish all airports are like Narita.

Narita is HUGE as well, 1 hour will fly and you may very well find yourself running to your gate!!
#2, Narita is quite possibly the smallest airport I've ever been in. Which Narita are you talking about?
#1 and #2 must be visiting a different Narita to the one I go through. Badly laid out, boring, and ridiculously far from the city, Narita is one of my least favourite Asian airports.
It does rate above Delhi and Mumbai airports, but that's not saying much.
Hong Kong, Singapore, Incheon and Kuala Lumpur are all far and away nicer airports to have stopovers in.
I am very glad not all airports are like Narita...
An hour is quite possibly just enough time to walk from your point of arrival to your point of departure, visit the bathroom and perhaps buy a drink. It isn't much time as you might have to go through security again. In fact, I think I always have to go through security again in Narita when transiting.
Just in case you have more time, check out the Narita Layover page.
It is not an interesting airport. Shopping isn't great. Food is expensive. It is, however, clean and modern which is more than can be said of the Manila airport and several others in Asia.
Ruth

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<hr>#1 and #2 must be visiting a different Narita to the one I go through. Badly laid out, boring, and ridiculously far from the city, Narita is one of my least favourite Asian airports. <hr></blockquote>
But we are talking about a stopover here, right? Not every airport has shower and day bed facilities, or has free baby nursing rooms and video game centers.