Sumo morning practice lets you sit in a small stable and watch the wrestlers go through their routines: stretching, drills, then the actual sparring. It's raw, repetitive, and surprisingly intense. You'll be on tatami mats in a plain room that smells of sweat and salt; the rikishi are focused and mostly ignore you. Sessions last about an hour to 90 minutes. Expect some shoving, belly slapping, and occasional loud slaps when they hit the ground. It's not theatrical like the tournament matches — this is their actual workday.
Best time is January, May, or September when the big tournaments are in Tokyo and many stables allow visitors. Avoid summer if you hate heat; the dohyo room gets steamy. Expect to pay around $40–80 per person including transport or a basic tour. Some stables let you go independently if you call ahead, but most foreigners end up joining a small group for access.
Tip: choose a smaller, less famous stable if you can — the atmosphere feels more intimate and the wrestlers are sometimes friendlier afterward. Skip the ones that let huge tour groups in; it turns into a selfie factory and the wrestlers get visibly annoyed. Bring socks (no bare feet on the tatami) and don't talk during practice.