They do have English-speaking concierges available. This is part of the original invitation. Their English might not be perfect, but they are pearl people, so they are sure to speak pearl lingo well.
Information on the Kobe International Pearl Auction (March)
Japan Pearl Exporters Association (JPEA) has been commissioned by Kobe City to hold an international pearl auction in March. We would like to invite you to participate in this event. In spite of the travel restrictions due to COVID19, we would like to invite guests from overseas to participate in this event, and we are preparing the guide service by concierge (available in Japanese, English, and Chinese language) who has a decent knowledge of pearls, so that you can do business online safely. For more details, please check those below. If you wish to participate in this auction, please fill out the attached Buyer Registration Form, Concierge Reservation Form (optional), and Tour Reservation Form (optional).