Staying on the Japanese theme, we have a wooden watchtower that would've been used in the numerous yamashiro that populated the landscape of Japan in sengoku period.
The main vertical struts had notches lasered in them on two sides (there were two of each of two different arrangements) to allow the horizontal members to fit easily and to keep the structure fairly strong. A deck was added to the top and the roof was made separately to allow the placement of figures.
I've still got a ladder to make and will possibly put some tate up on the deck as well but these will be removable. No wip pictures I'm afraid but I'll hopefully do that when I build the next one.