変な外人

First of all, we strongly want you to refrain from tattooing in Japanese.
You have no right to tattoo in Japanese if you have to ask someone about it.

There are several reasons.

Many of the Japanese phrases which you came across or will are probably fakes which were made up by mere learners of Japanese or Japanophiles like you.
Even if the phrases were made by real Japanese, they will not always answer your expectation.
For example, "切支丹" for "Christian" is the word which was deeply influenced by the claim of the xenophobic goverment of the premodern Japan who claimed "Christians should be slashed to death".
"変な外人" (weird foreigner), Minmax said, is an aphorism to you, and many Japanophiles.

There is a problem also on the part of Japanese.
Calligraphy is popular also in Japan, but most of the Japanese calligraphers abandon the modern Japanese and escape into classics because the writing system of the modern Japanese is the mixture of the three sets of characters and is hard to harmonize into an artistic work.
Most of the Japanese letters which we see are commercial letterings now.
Tattooing in Japanese is equal to staining your body with the dust of commercialism, contrarily to your noble belief.

Using Japanese means entrusting an evaluation to Japanese people unconditionally because Japanese is the native culture which is spoken nowhere but in Japan.
You could confuse your friends, but some Japanese will laugh at you for your mistakes.

Do not get angry, we only want no more to feel bad any longer by using Japanese.

Hi John. This will look strange in Japanese because this concept itself is odd. If you insist to have this, then I would go with what Mr Higuchi has put. The term "Samurai" also carries different nuances to non-Japanese people, and 武士 may also be what you are thinking of, and this means Japanese warrior (incl Samurai).

--------------------------------------------------
Note added at 9 hrs 5 mins (2004-07-06 23:19:55 GMT)
--------------------------------------------------

To Mr Matter:
Mr Kasuka does make strong statements, as I said. He certainly could have couched it better but everything he says is essentially true. I will admit that, living in Manhattan, I have seen many non-sensical Japanese tattoos and cracked up laughing at some of them. Many people get tattoos just because it¥'s cool, and superficial people like that are not interested in its historical and cultural significance, and these people chance being laughed at. Live and learn, I say. Anyways, ¥"Kurisuchan¥" is the word the Asker should use, if any. ¥"Kirishitan¥" has very negative connotations.