Another cool detail, if you want to call it that, is that the Shenmue 3 notebook is the biggest of the series so far, coming in at 391 pages. There are 3 different area tabs, also represented by the small images at the bottom of the page, which tally up to:
Bailu Village - 82 pages
Niaowu - 72 pages
Fortified Castle - 174 pages
Notes- 56 pages
Maps - 4 pages
Phone numbers - 3 pages
Now, the Naiowu number may seem small, but i would guess that both Niaowu and the Fortified Castle areas will have interconnecting storylines, and could be seen as one huge area, hence the low numbers. Also, with the first 2 pages of the map being taken up by Bailu Village, it seems to be that the last 2 pages will include both the Niaowu and Fortified Castle locations.
To go along with the numbers, here's a comparison with the previous notebook figures:
Shenmue - 139 pages (all story)
Shenmue II - 267
Hong Kong - 118 pages
Kowloon - 82 pages
Guilin - 12 pages
Money Information - 35 pages
Finally its also worth mentioning that there may also be more lines to a page in Shenmue III, with Shenmue having 5 lines per notebook page, and Shenmue II having 8 lines per page. But until i have a full notebook page from the demo, i cannot be completely sure.