Sanemi's age interests me, what about you?
No one seems to accurately determine Sanemi's age.
Some believe he is around thirties.
From the chronological sequence, it is plausible to assume that Sanemi is around 20s.
Reports about Sanemi's age differ, making it difficult to pinpoint his exact age.
Age aside, Sanemi is undeniably a highly skilled and accomplished individual.
Sanemi's commitment to his purpose remains steadfast, irrespective of his age.
To wrap it up, regardless of Sanemi's age, his remarkable talents, unwavering dedication, and strong commitment are evident and inspiring.

Demon Slayer Character Guide Ages Heights and Birthdays CBR