Sorry, but you can't say that. Shenmue and Yakuza are vastly different games.
Yakuza is more about the story, with lots of repetitive quests and a slew of pointless mini-games.
Shenmue is a structured world you live in and try to find clue's in to progress key story moments. The mini-games have a purpose and are an integral part of the story. Also, theres a way more complex conversation system.
Not trying to ditch Yakuza, but i don't think its anywhere near as good as Shenmue and if a fan of Shenmue goes in expecting the same game, they will be disappointed.
With that said, the cut-scenes and story of yakuza are very enjoyable.