osaka to tokyo

Hi,
i need to know what is the cheapest and convienent way to travel from :
1) osaka to tokyo
2) tokyo back to osaka kansia airport?

be in tokyo for 2 days which one of thr trip will be to mt fuji .

i read abt the jr railway pass, the "Hikari Hayatoku Kippu" and """Puratto Kodama Economy Plan", which one shld i get?

thanks

The cheapest is by overnight bus:

http://www.123bus.net/route/osa/osa-tyo.html?agencyCode=4268

3900yen one way. You also save on accommodation, because it's overnight.

Other options:
http://www.japan-guide.com/e/e4006.html

i'm not sure if it applies to where you're from.

but star alliance has something called a japan airpass which allows passengers of star alliance airlines purchase domestic flights at 11k yen.

this is much faster and cheaper than taking the shinkansen.

i've connected to tokyo haneda from osaka upon landing at kansai- they were really good...they moved us to the next available flight so tt we din have to waste time waiting.