Life after professional sumo (for those who don't qualify for elder status) is generally quite prosaic.
The vast majority of wrestlers end up working in regular jobs. Most slim down a lot, and within five or 10 years are often indistinguishable from anyone else in their chosen place of work.
If you've lived in Japan for any length of time, there is a possibility that you have unknowingly dealt with an estate agent, restaurant owner or massage therapist who is a former rikishi.