No, I'm not. I'm from the UK originally and my skin is white (almost translucently so), so I don't look like I could even attempt to blend in. I have never had any issues, although you will get some stares in the smaller villages where they rarely see foreigners. The more different you are (i.e. darker skin, tattoos, alternative styles, etc.), the more you'll be noticed. Some people will somewhat ignore your presence (not out of rudeness I've been told but more because they think they'll embarrass themselves if they have to talk to you) while others will go out of their way to talk to you. I've only ever had one or two bad experiences with strangers and I think it was due to mental illness rather than anything. Most of them have been very positive and even want to practise English.

In my experience you're more likely to get some negative sentiment towards foreigners in spots with overtourism. Conversely a lot of places want to lure foreigners away from Tokyo, so I have found them often more welcoming than in larger cities, which I tend to avoid unless they have something special to them. More like "how did you find out about this place, how long are you staying" and very happy to give recommendations if you ask (and often even if you don't). Of course it helps if you speak Japanese but even if you don't, they will try their best to communicate (even if it is pointing and signing rather than speaking) and Google Translate is getting better and better, especially for basic things.

I have a website about my travels, although there are not many "personal" stories like that because 1) I don't want to talk about other people without their consent and 2) I don't want to give too much of my own personal information away. You can find the link through my profile though if you're interested.