I didn't.
Lian Hearn has a grand story to tell. In 1857 Japan was on the cusp of a new dawn. Internal divisions were pulling the country apart. After years of isolation, thriving on the traditions of the Emperor and the Samurai, the country had to face a double threat. Internal divisions and ancient rivalries between the 260 domains that constituted the country were hindering its development. Most of them were deeply in debt. The semi-feudal government of the Shogun was beginning to be seen to be over-stepping its remit. The dreaded ''foreigners'' had arrived in their huge ships: the Dutch, the Americans. They may be claiming that they only wanted to trade, but those in the know in Japan had seen what had happened in China. The middle kingdom with all its strength had been forced to yield Hong Kong and Shanghai. How could lowly Japan, with all its current problems expect to stand firm.?
Some in Japan saw that they had to put aside their internal differences to face up to this new enemy. Others saw the way forward in trade, and learning new ideas from the west, taking the best of all worlds. Particularly attractive were the complementary good-&and-evil of medicine and weaponry. Many others held to the old ways.
Result: turmoil. Civil wars fought the old ways with the old weapons. A plot to overthrow the government.