[triptojapan]

Hi Sarasi,
I will be in Japan from the 3rd to the 15th of August and will stay in Tokio from the 11th to the 15th and travelling around the week before.
So,( I think) I just need a JR pass from 3 to 9th.
My plan (please let me know if I'm wrong) is to buy 1 JR week pass + 1 single way Kyoto-Tokyo= 28300 + 13500 = 41.800 aprox vs. 45100 JR 2 weeks. ¿Is this absurd?
My worries are that if I have to book the single way ticket (for the 11th) I can't do it in advance (until I land in Japan) and I'm afraid the tickets are sold out due to the Obon period.
Maybe my question is weird but I have no idea of what I will find on my trip. Many thanks in advance for your advice!