Yakuza is nothing like shenmue
The combat in Shen Mue was copied from Virtua Fighter, Yakuza is a beat'em up,
The open world stuff is nothing like Shenmue's which is more in line with how persona 5 schedule and time works, when Yakuza has no time constraints or limits in time, you miss sub stories in Yakuza by advancing the story pass a certain point, in Shenmue you miss events after a certain date in time
in Shenmue you have to beat the game by a certain date or Lan DI comes to your house and kills you
The open world stuff is nothing like Shenmue either other than the fact you can go into an arcade and play sega games
only thing both the series have in common to be honest
I mean the job in shenmue felt like a real job, tedious and you couldn't wait until the shyt was over, in Yakuza get night club minigames and real estate simulators