shinkansen to osaka

i will be taking the shinkansen to osaka, but i was wondering which station should i board: tokyo or shinagawa stations?
which one would be more crowded or would i still find seats from the shinagawa station?
i will be coming from shinjuku station.

thank u soo much ^^

Either would be fine, but Tokyo Station will definitely be less crowded by virtue of being the originating station of the shinkansen to Osaka.

If you are traveling from Shinjuku via the JR Yamanote line then you would pass through Shinagawa to get to Tokyo. I would suggest getting a reserved seat and changing at Shinagawa.

The travel time from Shinjuku to Tokyo Station (via JR Chuo Line) or Shinagawa (via JR Yamanote Line) are the same, so use Shinagawa if you make a seat reservation, or Tokyo if you will be travelling by unreserved car. The only difference in the two is the cost of a seat reservation (810 yen for the Nozomi or 690 yen for the Hikari).

thank u for your help!! i've decide to board at shinagawa station and get the reserved seats since i'll be travelling with my husband.

thanks again!! ^^