but

Matsudaira Katamori of Aizu lord.
(Matsudaira is the former name of Tokugawa clan.)

He was the sixth child of other lord. (Matsudaira clan)
He probably was excellent.
When he was around 10 years old，he became the adopted son of Matsudaira clan of Aizu.
And when his late 20s，he became the person in charge of security in Kyoto.

"We get to its position on the current political situation of Japan.
That is very dangerous."
Such opinion was the most in Aizu samurai.
In fact many lords had rejected already.
Of course Katamor also was understand it.
But he accepted.

・・・・・・・・・
　
Five years have passed.
Their's under had been added Shinsengumi.
They kept the peace of kyoto well.
　
But a little while ago，Katamori tried to resign.
Because he was sick.
　
"Now，Aizu forces will gone from Kyoto.
It is not good."
But Tokugawa did not allow.
　
And now japan regime were returned to the emperor.　
The menacing atmosphere had increased each other.　
　
"Now，Aizu forces will stay Kyoto.
It is not good."
Some lords asked to leave Kyoto to Aizu.
But they refused.