Episode 9 hewed back to the book. We see the key things:
- The formal attempt to leave,
- Mariko’s interrupted seppuku,
- Yabu’s treachery,
- Mariko’s de facto seppuku.
The ceremony wherein Mariko declares her intent to leave is significantly different in the book; it’s Ochiba’s birthday, Blackthorne makes a great impression, and, again, Mariko is not quite as glum, stoic a character. Her attempt to leave Osaka is longer and just a far more impactful scene with terrific dialogue, and when she goes to commit seppuku, more people are present, and it’s Yabu who steps up to be her second when Kiyama doesn’t show up. (Actually, when Kiyama flakes, she asks Yabu to be her second.)
However, the basic point of the plot is made:
[spoiler]It’s entirely a trap, and Mariko had no expectation of survival. She wanted this, because Toranaga will destroy those who destroyed her family. Now the de facto hostages will be streaming out, allowing Toranaga to forge alliances with enough daimyos to even the odds and be able to win the war.
What it does miss a bit is the fact Toranaga’s delaying is ITSELF part of his plan; it’s not just using Mariko. While he delays his arrival in Osaka, Ishido’s alliance crumbles; in the book Ishido promises Toranaga’s lands to more than one person, so his alliance starts to crumble, and the threat of Blackthorne and his warship being loosed on the Black Ship panics the Portuguese and Christian daimyos into making mistakes.
Toranaga delaying, delaying, delaying, being patient and letting his opponents screw up a good position, is a frequent theme and plot point in the book; his tendency to do this over and over is commented on by other characters, including Yabu’s family, and his history of doing that is one of the reasons a few key players figure out that he’s bullshitting before he makes it public he was never going to Osaka.[/spoiler]
The shortness of the show as compared to the book robs you of a lot of the subtlety. No way around that I guess.
One improvement I like is the fleeting nature of the love between Blackthorne and Mariko. In the book they spend the entire trip (by land) to Osaka screwing; they never fall out. The brevity of it in the show makes it more poignant, somehow.