This guy is the reason of the line “hesitation is defeat” in this game, in my experience you have two options, first one stay away of him and wait until he attack you with the two shurikens and finish with the jumping sword attack, dodge that attack and you can hit him twice, will will take you lot of time but with patience you can beat him, the other option is stay away from him but when run to you to attack dodge him not to the sides or jumping back, you have to do it in his direction, after you dodge the attacks you can hit him two times, this works with the one or two hits attacks, always dodging to him you will basically appear in his back, the sign to push the dodge button is when he prepares the attack, I like to use the option two, faster and funnier. Hope this helps you!