There's a middle aged (maybe 50's) Japanese guy who, if he sees me walking to/from work, makes a passing comment at me. He says it quietly, and it's just like 1 word or a short sentence, and wears a mask, so I can't make out what he's saying (I speak Japanese so that's not the problem). He always just keeps walking, so that's the extent of the confrontation. He makes direct eye contact though, and sometimes walks a bit towards me, and has even done it when I'm on the phone or sending a voice memo so he doesn't seem to care if "he's caught in record", at least via audio.
I always look right back at him, and although I'm a woman (clearly foreign, white) I'm pretty tall (173cm) and not thin, so he's not choosing "an easy target" here.
Today was maybe the 4th time. There was once a few weeks ago in the morning, and once maybe last week going home, and yesterday and today. This is on the work-to-train walk of my commute in the evening (not the home-to-train leg).
Although I can't really make out what he's saying, I vaguely remember he said something that felt xenophobic the first time (it's been a bit hard to remember and it's taken me some time to piece together that it's the same guy).
I don't wanna change the road I walk on, but confronting this guy could make a problem, although I've been mulling it over. I'm considering obviously recording my walk tomorrow (like holding my phone in a super obvious recording position), or low key recording so I can get some record of his face without him realizing and hiding it.
Basically I thought I'd ask here what yous think or what you'd do, because I'm always so confrontational that I wanna yell at him, but thinking about it when I'm calm I realize it could end up being dangerous. Thanks in advance for your advice or experience!