When I woke up today reading that interview, I too had concerns like shenmue852 said up above. I hope again it has been poorly translated as to me the answer to that question does sound as though Yu is trying to squeeze the rest of the story into Shenmue 3. This would be a huge mistake in my eyes, as not only would the story feel rushed, but his original vision of the series would be completely crushed when say 3 or 4 more games were originally planned and all that content is completely cut just to tie the knot in the third game. I know nothing up until this one question has sounded at all like he's planning to crush the story into 1 more game, but it has been over a month since the last update and alot can change. My other concern with this, is that finally we have the media coverage, we can self market this game through loads more mediums that we previously could when the Dreamcast was around, we have youtube, twitter, facebook, all these highly sharable and self marketable avenues to spread the word about Shenmue...which is one of the reasons Shenmue 3 is actually happening. The hype around the series right now and especially when the third game is close to being released, I think Shenmue this time around could be a success, and I would hate that Yu and his team realise the potential was there in this era to return to his original plan and have a Shenmue 4, and maybe even a Shenmue 5, but everything was cut to compensate for wrapping the series up in Shenmue 3. I can understand the other side of the argument that is saying that it would be another risk not finishing the story and people don't want to have to wait another 15 years for another game that this time likely won't be returning...but I don't think it will be as hard this time around for the series to bomb when we already have the attention of millions of people from the E3 conference, we hold a couple of world records on Kickstarter now, and the game is being released on the best selling console compared to the Dreamcast which was potentially the worst selling console at the time. Things are different this time around that mean that Shenmue can live on successfully through a game or 2 more.
Again, it's just one question and one weirdly worded answer, I hope that it was just slightly mistranslated