[Sakamoto was famous back home. Not only for his business, but for his service in the war. He was one of the four famous Joi, after all- One of the four who had given hope to the outnumbered soldiers. Showed them that humans could win against the aliens and their machines.]
I fought believing in the code of the samurai. But, when my friends were dying around me, and... For some reason, I was still alive, I stopped fighting. We weren't going to win. The Amanto had superior technology and strength in numbers. We had heart. We were defending home, honor...
But I didn't want to see my friends die anymore. I realized that killing wouldn't solve anything- It's money that moved the Amanto, people, usually. So I decided to start a business fleet in space. We buy and sell things throughout the galaxy, trading, and cement peaceful relationships through that. You can always get money back but you can never bring a dead man back to life.