Re: Jacket embroidery: kanji AND latin/roman characters at the same time?
I have also seen both, but one quick point about Japanese writing. It probably isn't Kanji that you have seen. Most non Japanese people have their gi embroidered with katakana which is used for words of non Japanese origin. Sometimes non Japanese people select Kanji that can be read to sound like their names but that is rare. In Japan and North America, I have mostly seen Katakana or Romaji(Roman letters), or both.