I believe a 7 day Japan rail pass would be wise but hoped you could confirm it would work and be most economical for the trips I'm taking?
Yokohama to Okazaki Sunday morning
Okazaki to ? (Tokyo or an onsen somewhere between Okazaki and Osaka) Tuesday middle of the day
Shinkansen to Osaka Thurs
Then to Osaka airport on Fri mid-day
Alternative is to stay in Tokyo Thursday and take the shinkansen fast train Friday morning straight to Osaka airport from Tokyo? But that would not allow us to see anything of Osaka
Thank you