Is your character any manner of spirit, youkai, demon, or otherwise inhuman being? Does your character share their body with any manner of spirit, youkai, demon, Persona, etc?
Only if the lizard counts

If your character is human, is your character capable themselves of sensing spiritual energy, youkai, demons, etc? Further, do they have harnessable spiritual powers?
Sure does

Does your character carry any manner of object or artifact that might ping as being related to spirits, demons, the underworld, etc?
non

Are you okay with Matoba sensing your character's inhumanness/their ability to see/their magical or spiritual artifact?
How annoying would it be if Matoba just announces every time he feels Natori nearby just because he can

Are you okay with Matoba testing your character's inhumanness/their ability to see in minor ways (such as asking intrusive questions, summoning his youkai servants, or chanting a spell that might have physical effects *not* on your character such as surroundings)?
No but that didn't stop him the first time