hi guys, i need some advise on how to make a day trip to nikko, it's my first time visiting japan. I have 1 free day and i wanna go to nikko in the morning from asakusa then make it back on the same day.

so from my research I should get the World Heritage Pass which include the round trip train fare from Asakusa to Nikko via Tobu Line.
Where can I get the World Heritage Pass?
Is this the recommended way? How long will the journey take?

Once in Nikko can i use public transport to  Toshogu Shrine, Futarasan Shrine and Rinnoji Temple or do I have to walk there?

To those that have visited Japan,

I've bought a flight ticket to travel to Japan on April 2013. I'll be arriving in Osaka and departing back from Tokyo.
However, my main concern would be the radiation level in both Osaka and Tokyo. I've checked out in google on the recent radiation level in both of the cities and it was rated at a safe level as in it is parallel as New York City. But having said, every now and then I'll hear news from people stating their female friends that has just came back from Tokyo were detected to have a high radiation level in their body and was advised by the doctors not to conceive in 2-3 years.

Hence, for those that have recently been there, do you mind telling me on the current condition in Japan. Thanks