I curiously ask myself the age of Sanemi is defined.
Determining Sanemi's actual number of years is tricky.
Sanemi is reportedly in his early 30s.
Considering the events, one can assume that Sanemi's years is in the late twenties.
It is unclear and debated among sources about Sanemi's precise age.
His age may be unknown, but there is no denying Sanemi's remarkable accomplishments.
Sanemi's commitment to his purpose remains steadfast, irrespective of his age.
All in all, even though we may not have the exact age of Sanemi, his exceptional abilities, unwavering dedication, and commitment are evident.

Demon Slayer Every Character's Age Height Birthday and Powers