It’s not a problem if you don’t understand Japanese.
While Keiko(practicing), the instructor generally explains in Japanese*. Because of this, there may be many things that you do not understand. Please feel free to ask the instructor about things you need help understanding or are interested in.
*The instructor will explain in English or use translation software when necessary.
However, traditional arts in Japan (the “dō (way)s”) emphasize “feeling” rather than “understanding through words” (this may be similar to music). Don’t worry too much about the language; try moving with an open heart.