Sumo is a monolith. Individual stables may exhibit variances in training and culture, but for the most part life for wrestlers is the same throughout the sport. Enter any stable early in the day and you will find training going on. Come back at 6 p.m. and everyone will be eating dinner.
It's a remarkably consistent world but unsurprisingly so when you realize there are rules governing virtually all aspects of a wrestler's existence.
Everything is codified, from the exact routine to be followed in tournaments before and after bouts, to the footwear and clothing you are allowed to wear in each division.