Well I do suggest let someone who can translate EN > JP for you.. But if I remembered correctly they accept Google Translated emails, just explain clearly what happened and if they replied after a day or two then just translate what they said and reply with appropriate answer. Remember this...
If you guys got banned ( accidentally 1 hits cw boss ) and have a decent progress like me you can issue an email to request the devs to lift the ban to your account. Just send a Japanese report on what happened.. Got mine back after a week of exchanging mails.