I recently caught the shimakaze and did not manage to get front row seats (a task which was made even more difficult by booking the train towards Ise shrine during the new year period).
The reservation system was a bit of a mess as it was showing all seats as empty during seat selection, but after I entered in my card details, it would error out saying that the seat was already reserved. I tried a few different seats and the same error happened - eventually I got sick of doing that and just let the system auto-assign a seat for me.
Similar to the shimakaze is the hinotori from kintetsu, although this is more of a commuter train than a tourist train, a luxury alternative to the shinkansen.
The hinotori runs between Kintetsu-Nagoya and Osaka-Namba with departures every 30 min (peak) and 60 min (off peak) and takes around 2 hours. By comparison, the shinkansen from Nagoya to Shin-Osaka takes 50 minutes.
This time, I did manage to get the front row
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