We mostly wanted both English and Japanese on the certificates because our martial arts roots are very Japanese, and we wanted to pay homage to those roots.
I can speak Japanese - some, I lived there for 2 years 30 years ago, but sadly much of the language, particularly the Kanji has left my brain. These were just so bad I couldn't begin to look a lot of them up in my Nelson's Kanji dictionary.
The one in the box I've managed to figure out a few of them: The Kana are pretty easy to pick out , but the kanji aren't so easy.
this is what I have so far.
上記の
ここに一級であわことを証する
Translation wise it's supposed to say something like:
The above mentioned student has completed all requirements for advancement to the rank of 1st Kyu - We so testify.