The "Shenmue" series is currently only out of the third part, and according to the plan of the main creator Yu Suzuki, the series actually has a lot of follow-up content, and it is completely possible to make several sequels. Recently, there have been some news that Shenmue 4 may already be in development!
In early April, publisher 110 Industries seemed to be hinting online that they would release Shenmue 4, and today they tweeted that they would be making big announcements in the coming weeks. At the same time, they came with a picture of banana + apple, which seems to correspond to the bananas and apples that Lingshahua placed every day in "Shenmue 3".
Shenmue 3 wasn't released by 110 Industries, and the distributor didn't have a partnership with Yu Suzuki, but at TGS 2021, Yu Suzuki spoke at the 110 Industries press conference, and it's clear that they've now reached some kind of collaboration, perhaps for the development of Shenmue 4.
Of course, it may also be that Suzuki Yu has made some other new games, in short, the new news of 110 Industries is still quite exciting.