EDIT: added print profiles with Tree Supports which are much easier to remove. Supported face is not quite as clean as with normal supports but it's under the bridge and not visible in play.

Bridge model for the game White Castle. I have provided the model as a one piece and pre-cut as stl files. Plus a 3MF.

The Japanese bridge was remixed from https://www.thingiverse.com/thing:4678369 by user https://www.thingiverse.com/marv28297 and was modified to scale and dice platforms were added.

For the cleanest print, I cut in half down the center of the long-dimension of the bridge and printed with the handrails plate-down. Used the prong connectors and a wee bit of glue. Support is used for the dice platforms, came away very cleanly using Support PLA. I tried printing as a whole but couldn't get it supported clean enough to my satisfaction but give it a try. Without supports, the handrails weren't clean enough although settings tweaks for overhangs may work.