Demon Slayer: Kimetsu no Yaiba Episode 15 Review: Mount Natagumo

Another week, another episode, and another demon to slay. In Episode 15 of Demon Slayer: Kimetsu no Yaiba, Tanjiro, Zenitsu, and Inosuke leave the comfort of the Wisteria Inn and head to an ominous mountain. While Tanjiro and Inosuke rush ahead to do their job, Zenitsu is left behind to mull over his life choices. Let’s see how our Demon Slaying Squad fared this episode. But before we do that, fair warning, this episode is not for arachnophobes! 


After getting the all clear from the doctor, the Demon Slaying Squad head off to their next mission: Mount Natagaumo. Zenitsu immediately gets a bad feeling from the mountain and it proves to be true, as another Demon Slayer Merchandise runs out of it and begs for help. Before they can help him, he’s pulled back into the mountain’s forest by invisible threads. Tanjiro and Inosuke rush in but Zenitsu stays behind, too scared to go anywhere. As the duo head deeper into the mountains, they find another slayer who requires help. He tells them he entered the mountain with nine others, but they all began to attack one another. As the bodies of his comrades circle them, Tanjiro and Inosuke quickly locate the puppet master. But it’s soon revealed they’re not just against one demon, but a family of them. 

Episode Highlights

Another Butterfly Girl?: On top of seeing our old friend Giyu (hopefully a reunion is incoming!), we meet another demon slayer, a girl with a butterfly hair tie. The hair tie is very similar to that of the girl who survived the final selection; perhaps they’re related? 

Eight-legged freaks: This episode gave me the heebie-jeebies with all the shots of spiders and webs!! It’s difficult to appreciate how detailed the depictions were of the spiders when you’re trying not to look too closely. 

Spatial Awareness: The CG animation of Inosuke’s spatial awareness was incredible. It’s really interesting to see the unique skills Tanjiro, Zenitsu, and Inosuke have and how they’re animated. 

A smell most foul: Many episodes before, Urokodaki told Tanjiro that he would be able to tell if a demon had killed many people because of its smell. I’m guessing that’s the foul smell that Tanjiro has been smelling all episode: the stink of death! 

Wait for me!: Aww I felt a bit sad for Zenitsu when he was moaning about being left behind, although he was definitely hoping for too much! While Tanjiro may have held his hand and given him a pep talk, I highly doubt Minsk would have been so encouraging! At least his sparrow sticks by him.

Wise words: It’s interesting to see the beginnings of Inosuke reflecting on the old woman’s words. After Tanjiro telling Inosuke that by entering the forest first, Inosuke gave Tanjiro strength, Inosuke begins to think about living life proudly and with honor. While I doubt he’ll ever lose that wild streak (which does make him loveable), we’ll definitely be seeing some changes in the way he treats those around him!

Themes & Trivia

Jorōgumo (絡新婦): Known as ‘binding brides’, or literally as ‘spider woman’, jorōgumo are a type of demon from Japanese folktale. They are spiders who have reached their 400th birthday and are then transformed into a beautiful woman. They lure people to their deaths by entrancing them with the sound of the biwa, a traditional lute. 

Spiders in Anime: Spider woman have appeared in anime a few times, key examples include xxxHolic, Daily Life with a Monster Girl, and Soul Eater.