So on my list of "things to do" was the integration of the old Bakumatsu Mod back into PDM. The Bakumatsu Mod did some excellent things, one of the foremost being that it added some interest and turmoil to an otherwise boring country... for such a great power, Japan's one of the few countries to have next to no new PDM events added for it. Even in vanilla it only has very few.
What the Bakumatsu Mod did that eventually got it removed from PDM, however, was that it created a separate nation for each daimyo (over thirty) in addition to the Tokugawa Shogunate and some of the successor states that the Shogunate became in the course of the Boshin War. That was a tremendous amount of countries, all OPM's that simply got swallowed up the moment the Boshin War began... and none of which were actually nations in their own right, anyhow.
After looking through the events & decisions in the mod, another issue is that they were all quite deterministic-- triggers were mainly just set to occur in a certain year, and only a portion of the AI daimyos had any choice which side they joined once the Boshin War occurred. I think, however, that the spirit of these things can be retained to a degree even if a less deterministic route can be charted.
Essentially, what I'd like to do is this:
Lead-Up to the War: there are two main events that occur, starting (in the mod) with Admiral Perry's mission to Japan. I think that can be made less deterministic by tying them to Japan switching to interactive reform... that's really where the trouble started for the shogunate, after all. Some decisions like the Admiral Perry one could be allowed to encourage this to happen, but once the interactive reform is obtained then the trouble starts-- the Ansei Purge, the Imperial Order to Expel the Barbarians and the Assassination of Il Naosuke in particular.
Ideally it would work like the Taiping Rebellion. One new tag (the shogunate getting its own tag and JAP being the rebellious Imperial government) that starts in Kyoto and spreads from there.
The Boshin War: Again, like the Taiping Rebellion, this would result in Imperial Japan seceding from the shogunate and starting a civil war. If Imperial Japan wins (there are surrender events for both sides), it annexes the shogunate and gets its decision to move its capital back to Edo (and change its name). This would allow it to enact the Meiji Restoration. In the mod, the shogunate has a similar (if slightly less effective) version of the decision if it wins the war. I don't think I would bother with Ōuetsu Reppan Dōmei and the Ezo Republic, which were both just extensions of the war itself.
Post-War Events: One event is the Satsuma Rebellion, a good one for post-civilized Japan-- as an attempt to restore the shogunate. There would also need to be a decision for a successful shogunate to Become Japan if it stops being a monarchy.
Only question, really, would be what to do if the shogunate civilizes prior to the Boshin War-- there's no way to prevent it, after all. So would the Boshin War still happen if it civilizes? Would it happen immediately?
Overall, though, I think I can do this... it's an interesting challenge not unlike the Warlord Era. Just looking for Naselus' okay-- and maybe some thoughts thrown out from people who know more about this than I do.