second class in shinkansen seat type?

i'm planning to take JTB tour to kyoto. I read that i will get a second class shinkansen seat type. What is the meaning ofthat? WAs is kind of reserved an non reserved?

Probably meant "ordinary" seat on the Shinkansen. Ordinary seats are just as comfortable, with plenty of leg room.
I think JTB tour seats are reserved.

You have 3 kinds of seats: the non-reserved, the reserved and the "green" seats (wich is basically first-class). Non-reserved and reserved offer the same comfort (wich is still very nice), but as the name implies: With non-reserved there is a chance that there won't be a seat for you left, requiring you to either stand up or take the next train. If you know you are taking a busy line, this can be avoided by arriving early to be one of the first people in line.

thanks a lot, i got it now. So, all the shinkansen seat type are not my worries :)