It's one of the smaller hoses that appears to be leaking slowly/weeping. Not the main hose from the big oil tank.
55113-KV3-830 - Tube Breather vinyl. Might be the one. Not sure if I can just use some generic hose or can get the original Honda part.

That was quite hard to find the fiche for the oil tank. It's under "Real Cowl, Glove box".

Might be some of the other smaller hoses around the area leaking too...very difficult to read the fiche for some things can be quite small! Not absolutely sure I got the right part no.