I was wondering what device this could be. Then I remembered just how amazing Google's image search is:
トヨタ・ダイハツ 純正DVDナビND3T-W57ジャンク品 - ヤフオク!
A DVD-based navigation unit... Interesting, never knew these existed. The password is apparently something you set up yourself as theft protection, not for unlocking maps. Of course, if you forget this password or didn't receive it when getting it second-hand, the unit ends up as ジャンク (junk) like the one above...
Other photos of devices with a similar password screen show that the R横浜 is indeed most likely the password
hint, not the password itself:
(好きな食べ物は? = "What's your favourite food?")