Upgraded version of the PDF-5. Had a slightly larger screen (10.4 inch, 480×640 monochrome STN)
Had a few optional accessories:
PDL-K3W PC-Link Kit - Cable to connect to Windows 95 PC, uses “Centronics Parallel Compliant Printer (Amphenol 36 pin)” (It lists the price at an absurd 50,000円!)
PDK-1P Printer Cable - Similar to the one on the PDF-5, allows the device to be used with compatible printers.
PDN-1P Handy Scanner - Handheld scanner, used for hard to scan items.
PDM-1P Prompter Attachment - Pretty much an angled mirror stand that lets you use it as a prompter.
Official release date couldn't be found, but estimated to be middle of 1998 or so.
Content adapted from: Japanese Blog with scans of fliers.