This scene is from Rurouni Kenshin: The Legend Ends (2014).
Kenshin was the best assassin of the past government. He was famously known as Battosai. He had since sworn to not kill anymore, carrying a sword that has the sharp egde at the wrong side.
The new government has asked for his help to kill a rampaging ex-assassin, who is threatening the safety of the nation.
Aware of his weakness after a recent duel, Kenshin asks his teacher (also called “master”) to teach him the ultimate sword tehnique of their school so that he can defeat the enemy.
His teacher agrees. They fight-train —physically, mentally, emotionally— a holistic approach.
Kenshin and I learned something very valuable from Master today.
Domo arigato gozaimashita. (That’s a very respectful ‘thank you very much.’)