DreadFish
Cosmic Vagabond
Where I go, they have several pictures of what you can expect if you decide to go with a discount/cheap tattoo. They aren't pretty and honestly I would probably regret it to if I had something that looked that bad on me. They also have a sign that clearly states "if you a drunk, high, or ****** up on anything, come back when you aren't." I do not see myself ever doing business with a parlor that is not at least as equally serious as the one I go to now. You can tell as soon as you walk in, they are professionals who are running a professional business.
And the culture of it is another major part. People who typically get tattoos or piercings also typically belong to a sub-culture where you will be hard pressed to find someone who isn't pierced and tattooed. In many ways, they serve as a sort of potential "kinship marker" that can help group members more easily identify each other.
Yeah, I imagine that, if anything were to make me wish I didn't have a tattoo, it would be being absolutely surrounded by a culture that totally disapproves of tattoos. That, I will try to avoid.
When a person is surrounded by people with the same culture that fully accepts and celebrates tattoos, there is absolutely no reason to regret a good tattoo.
On the topic of Japan, lately I have been curious. Do you think a Japanese person would react the same to a tattoo that is obviously not Japanese style? Irezumi is a distinct style and I have never heard of Yakuza getting foreign style tattoos. So, do you think that would make a difference for a foreigner with an obviously not Japanese tattoo, or do you think that the average Japanese person wouldn't really notice a difference anyway?
I've recently met and spent time with a few Japanese people on a regular basis. They have not reacted negatively to my tattoos. Of course, it is very possible that they have had thoughts about it, but are too polite to say anything or act like it. I did have one of them tell me the Japanese word for tattoo and then explain that, in Japan, only Yakuza get them; just as a sharing of cultural information.