Originally Posted by
AlwaysAisle
That is not actual Sumo match but practice at their gym, or Sumo Beya. I personally think is not same as watching actual event. Anyway, my understanding is that during the tournament, such as OP’s situation where Tokyo Oo-Sumo Tournament is taking place, there usually is no early morning practice session at each Sumo Beya. Morning practice session take place at each Sumo Beya when there is no tournament. Visiting early morning practice at Sumo Beya is good option when tourists are in town when there is no Sumo tournament is going on.
The article I linked to says that Morning practice sessions do take place (to some degree) at some of the Sumo Beya whilst tournaments are taking place.
I'm putting it out there as a possible option. That was the whole point of my original post - consider going to practice and not an actual match.
The fact that the training/practice is less rigid and intense during tournament times may (perversely) make it an even better option for a family than would be usual.