Edit: This is not a confirmation of localisation, just an update on how long it’s been compared to other games!
So not including Kenzan or the PSP spin offs (that never made it over here) Yakuza 5 is currently the 3rd slowest title to have a western localisation announcement since the original Japanese was released.
Yakuza 2 – 587 days taken to announce.
Yakuza 3 – 285 days taken to announce.
Yakuza 5 – 263 Days (So far as of August 25/2013)
To see the full breakdown of release dates to localisation announcements visit my other article over here now updated to include today’s date and Ishin.