Video cameras are permitted for a fee of ¥100, plus a ¥50 deposit for a permit. Plainclothes guards are stationed throughout the grotto area, so don't be tempted to tape without a permit. Still photography is allowed inside the grottoes except where signs indicate otherwise.
Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.