Y十M: Yagyuu Ninpouchou Chapter 56 Discussion

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                        The explanation for why Doukaku is "immortal" was a terrible one, and from what I could understand then he is not really immortal and actually bet on a chance of 50% of survival when he cut his own breast with his sword, since, according to his explanation, if the "star" were on his brother's side then he would have died. I liked how his daughter expressed confusion and exposed the contradiction, and then I was expecting that he would clarify it, but he didn't, and just ended saying that he wouldn't die regardless of what technique his enemies used against him, even though he had just said that someone could kill his brother by killing him...

I'm liking this manga, but this one is a very bad detail. And I hope there's a better explanation for his immortality before the end of the series.