The new title will be known as Ryu ga Gotoku 4: Densetsu wo Tsugu Mono. The Japanese translates, roughly, to "The One Who Succeeds the Legend."
While Sega has yet to share solid details on the game, it did provide first character and voice actor information today. Typical of the series, Sega will be making use of an all-star cast. Actors Hiroki Narimiya and Kenta Kiritani will feature in the game. Narimiya will play the role of Masayoshi Tanimura, a detective in Kamiyacho, the main setting of the series. Kiritani will play the role of Takeshi Kido, a member of the Toujoukai mob, which has also appeared in past Gotoku games.
The presence of Kamiyacho and Toujoukai appears to confirm that the new Gotoku game will take place in modern times. Series general producer Toshihiro Nagoshi hinted at this in interviews during the game's initial announcement a few months back.