I hope so, because I'm not Japanese. You definitely can. What it asks of you is respect: do not take a Japanese practice, call it Reiki, and then add all sorts of other things until it is something it is not. Learn a little about the culture it comes from and about the Japanese aspects of the system.

Mikao Usui wanted the system of Reiki to go out into the world and be available to anyone, anywhere; he said so in the early question-and-answer manuals. What he did not say was that it should become a different practice. He built a system grounded in Japanese culture. Take it out of that and you are no longer practising the system of Reiki; you are appropriating it and changing its foundation.

In Japan the practice is internal and meditative, strengthening the hara and working from the inside; in the West it is external, about doing things. And in Japan the precepts are the foundation under everything, the treatments, the Reiju, the meditation, and also the point of it all. If we are the precepts, we are Reiki.

Yes. It is not an ethical dilemma. You are not charging for Reiki, for energy; nobody can pay for that. You are charging for your time, and if you are a professional your time has to be paid for. Know your base price and work from it. Otherwise how will you keep offering your time?