Practice at sumo beyas (stables) generally starts early, so plan to be there by 7 am (even earlier on a day when there is a tournament on) and it runs 7 days a week. But the November tournament is in Fukuoka so in late October/early November when you plan to visit, the stables will already have left Tokyo. You can watch practice in Fukuoka instead but the locations are harder to find, a local concierge there might be able to find out.