Take the cowling off and check the area below.
Had the same problem with a 92 NX and there were old leaves and other crap down in the "box" on the passenger side.
Cleaned everything out, checked the seals and no problems since.
Also just fixed a reoccurring leak onto the passenger floor board in my 92 SE-R.
I couldn't find that one for a long time. Checked the sunroof drains, cowling etc.
Then one day after a heavy rain water when I had to brake hard, water came pouring out of my sunroof switch.
Turned out the metal under the glass sunroof gasket was rusted away. Replaced the sunroof glass with another one and problem solved.