I came across this Japanese site after a link on driverguide.com http://faq.askpc.panasonic.co.jp/faq/1038/app/servlet/qadoc?001194 I do not read Japanese, however, I guessed there were two files, one executable about 20K + the other a PDF probably the instructions.
I will downloasd that too in case there may be something in English.

Support Information:
Device Type: CD / DVD
Manufacturer: Matshita Panasonic
Model: ujda 300
Interface: Other
Operating System: Not Applicable
Age of Device: < 2 years old
FCCID:

Type of drive: dvd-r/cd-rw (dvd burner, dvd reader, &amp; cd burner combo)
Location: internal
What recording software are you using?: Nero/version

Find it on DriverGuide (http://members.driverguide.com/index.php?action=srch&sm=b&aax=&qa6=0&qa5=3&qa7=2&dp=2&qm0=ujda+300&jmd=and&fzz=d) | Find it with Google (http://www.google.com/search?hl=en&lr=&ie=UTF-8&oe=UTF-8&q=Matshita+Panasonic+CD+%2F+DVD+Matshita+Panasonic +ujda+300+Not+Applicable+)

Optical drives never require a driver when used in any Windows OS beginning with Windows 95. The Windows OS provides native support that allows this drive to read a data or music disk and to burn a cd-r disk.