Susamaru is an endgame boss in Project Slayers, and her Tamari BDA can be quite hard to overcome as her range is quite big, and even when you get close to her it's hard to guard against her attacks. You can check our Project Slayers map for his location, but it is best to unlock Ouwbayashi Home by spending one map point (1,200 Wen) and fast travel there using the Horse Guy.
If you are having a hard time against Susamaru there is a way to make your life much easier. All you have to do is use a tree to block her attacks. Essentially, you will be using your combos to knock her down, then by the team she is up just move behind a tree to block all her Tamari attacks. Once she starts coming around the tree, combo her to knock her down again.
It's a really simple process in which one of the hardest bosses in the game gets beaten by a tree.
The video guide below by Milxy showcases the hide n seek strategy used to take down Susamaru perfectly. The approach is quite forgiving too, contrary to many other strategies required to defeat bosses in Project Slayers.
Alternatively, you can just climb up a hill and spam Susamaru with range attack and jump in to combo her. There is a great video by YouTuber Khaiel showcasing this (1:26 mark) and the same trick can be used against Yahaba:
While you are here, don't forget to check our Blood Demon Art Tier List, Breathing Tier List, and Weapon Tier List to set up your character for success in the game properly! We also have guides on how to get Water Breathing, Thunder Breathing, Insect Breathing, or Wind Breathing.
Finally, note that a private server will make your life easier while leveling up.