I've been trying to work out how to use Shinkansen between Shin-Osaka and Sendai for days, very frustrated as I could only come up with 2 unsatisfying ways to make a one-day trip from Shin-Osaka to Sendai.
One is buying a 7-day JR Pass, the other is buying a 5-day ticket from JR West, another ticket from JR central, and a ticket from JR East. Which ends up paying very much just for one-way trip.
Here I would like to ask for some help to work out what's the most cost-efficient way to make this trip.
Thank you all for the help in advance.