Well, IOTL the samurai were reclassified as Kazoku for the former feudal nobility and Shizoku for the retainers, but the Shizoku classification will have to be purely symbolic as there were way too many of them.
Also, I think it's important to point out that the shogunate elites at the end of the Edo period weren't really more inclined towards traditionalism than the opposing faction. If anything, the opposite was true.
Again, they
were the overwhelming majority of the officer class IOTL, but they cannot be
all of the standing army because you need a large number of trained professional soldiers (not just "cannon fodder"), and for "special elite units" you need meritocracy. It's also important to remember that the majority of the samurai is not going to want to fight in a war. By the end of the Edo period, they had been a privileged bureaucratic class for hunndreds of years, and most surely most would prefer to keep it that way...
This is a big, MASSIVE NO. Disarming them is going to be very high on the priorities list of any government with half a brain, especially the lower-ranking samurai that were dispproportinately involved in anti-shogunate (and later anti-Meiji government) activities. The 1870s saw massive shizoku uprisings in Kyushu and other places (it's impressive how much damage a few people with swords can do even when the police and military have guns), so this would be a no brainer.
Doubtful. With Japan open to trade, western cultural influences will inevitably spread and be gradually adopted. That's inevitable, imo. Plus, the first Japanese people to wear western clothing
were shogunate officials. For example, here's the last shogun...
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Not really an apt comparison, as the position of shogun was also hereditary and the Emperor was kept more cloistered and out of the public view than your usual. The Tairo (Great Elder) of the shogunate was more of a Prime Minister-type position, and the Roju and Wakadoshiyori were more like ministers or parliamentarians. But in my opinion the shogunate would most likely abolish these positions in favour of a more western-styled system of government.
Intermarriage between shogunal and imperial families was common is every shogunate. They had already been doing this for hundreds of years...
No, the shogun (or whoever controlled him) would retain all real power while the Emperor would be remain in the Imperial palace doing petry.
???