Legal age to get a tattoo in Japan?

Google doesn't seem to be much help, some say 18, some say 20.
Thanks!

There is no such age.
But it's illegal for a non-medical doctor to give a tattoo in Japan.

What kind of nonsense are you talking about?
In Japan it is prohibit for a minor (below age of 20) to have a tattoo in Japan.
If you are 20 years or over you can get in contact with tattoo artists.

Keep in mind that tattoo in public places like bath etc are not allow or need to be covered.

...and whether a tattoo artist needs a medical training or not is subject to interpretation of existing law, which is being debated in the court of Osaka. That should not concern somebody getting a tattoo.

The age depends on the by-law of the prefecture (���N�琬���). Also, some studios ask for an ID as they don't accept high school students.

@sumi
...and whether a tattoo artist needs a medical training or not is subject to interpretation of existing law, which is being debated in the court of Osaka.
Osaka court already gave a decision that giving tattoo is considered to be a medical practice in 2017.

That should not concern somebody getting a tattoo.
It does, because no decent medical doctor doesn't to such a practice.

I got a couple small tattoos done by this great guy in Ikebukuro. He definitely wasn�ft a medical doctor but was very careful to show his certification license number hanging on the wall and was very careful to show that all needles were new and opened them in front of me. But you need to be at least 20. They take down all your info and make copies of your ID.

You don�ft need to be a medical doctor to be a legal tattoo artist in Japan but you do need to get certified and take some kind of medical training course. The problem is that a lot of tattoo artists in Japan operate in a grey area and don�ft have the certification

I think there is no specific legal age for a tattoo, but the parents may allow their children do it when they're 20 (the age of becoming an adult in some Asia countries like Korea, Japan,...)

Like I mentioned previously, there is indeed a specific legal age for a tattoo, and it is stated in by-laws. For example, in our prefecture of Kanagawa, it is stated on Articles 7 and 30 as follows:
http://www.pref.kanagawa.jp/cnt/f4151/p385175.html

Then, of course, every tattoo artist has the right to decline even older customers, depending on the artist's policy.