Youkai Watch

Youkai Watch and Natsume Yuujinchou are similar in that both the protagonists befriend and are troubled by youkai (though one can see youkai because they are "gifted" and the other through the use of a watch-like device). Natsume Yuujinchou takes a more sad and serious tone to the youkai presence in the protagionist's life and focuses more on the protagonist. Whereas Youkai Watch takes a more lighthearted and comical tone and focuses more on the youkai. However, both series have a tendency to leave you feeling the same way. They both have touching and warm stories that can make you smile. 

Young boy catches warious monsters, stores them in portable device and then lets them out when needed. Both are episodical anime for kids. 

Both are gigantic children’s anime franchises that feature huge casts of amazing and unique characters fighting against equally memorable villains.  

Both are series centered around monsters that are used by children in a setting with a more comedic and slice of life tone than the rest of its kind. 

Main character frees a magical creature by accident and has to capture other magical creatures that cause trouble. The creature on the main character's side is a bit quirky and knows almost everything about the other creatures. Both main characters can also use the captured creatures. 

Both are comedic children’s series that take place in colourful worlds with a large cast of characters. 

Both anime have a watch with which you can see monsters. In both anime, the monsters live among the people, but nobody notices it. 

Both are about one or more human protagonists who enlist youkai to help solve supernatural mysteries. These anime are heavily based on traditional Japanese culture and mythology. 

Both are heavily based on spirits and urban legends, and feature surreal worlds with a mix of comedy and darkness. 

Both are about an average boy whose life is changed after meeting a huge cast of supernatural beings. He befriends some, and they end up in awesome and funny situations and adventures. 

In the beginning, both series are about protagonists who search for rumours and phenomena caused by supernatural beings. In later episodes, the story becomes darker when the protagonists have to fight against a powerful overarching threat. 

While being a very different style of show, they both follow a male protagonist, helping people by defeating Mononoke/Youkai. Both are interesting to watch and keep the watcher engaged. The side characters are interesting and well written. 

While Yo-kai Watch is more kid-oriented, both series are gigantic and hold casts of colourful and memorable characters and worlds. Both can keep you entertained for months. While it starts slower and isn’t as dark or violent as My Hero Academia, Yo-kai Watch becomes surprisingly dark for a children's show. Genuinely disturbing villains (both visually and behaviourally) and onscreen deaths (including suicide) appear more frequently later in Yo-kai Watch.  

They are both shows, that are about a boy and all the different Yo-Kai that he meets, while having a more comedic, Slice-of-Life tone. Yo-Kai Watch has a style more similar to Pokemon and other shows like that and runs for three segments per episode. Kiitaro is much shorter, but the Yo-Kai feel more "realistic" than in Yo-Kai Watch and it feels more like a Slice-of-Life show. 

both anime's are full of random skits and random jokes. 

They're both series where the main focus are cute characters, in the case with Keroro Gunsou it's alien frogs and Yokai Watch it's Yokai. The stories and humor are pretty similar to one another as well and they're targeted to children in Japan. Even some of the characters are pretty similar (Keita is similar to Fuyuki and Jibanyan is similar to Tamama). 

This season of Digimon has a lot of similarity with Youkai Watch: - The main protagonist is a boy who has a device that allow him to see Digimon/Youkai. - During the episode both of them have to face some problems caused by those Digimon/Youkai and they have to solve it. - Also, they both can capture a Digimon/Yokai and use it to fight their enemies.  

"Gotta get/collect them all" theme and "monster of the week" themes. However it should be noted that monster battles are more action-packed and intense in Pokemon, while Monster summons in Youkai watch have less action and usually depend more on the Youkai's special abilities (e.g. possession). 

Both are about a bunch of kids interacting with ghost's in one way or another, Yokai watch is a bit more goofy about it though. Both are more of a collection of short stories rather than a whole series as in they both focus on random ghost's for an episode rather than have some sort of big story. Both have a weird white ghost blob thing who is sorta the mascot, in Yokai watch Jibanyan is also the mascot and it's often said how everyone likes him more than whisper in the show but personally i prefer whisper. 

Sudden dark humor! It's a bit more rare in Ika Musume but it, just like Yokai Watch, occasionally has these sudden moments that make you think "Wait what." Especially when it's so casually played off. You wouldn't expect it from a colorful and childish looking show like Yokai watch but it deals with cannibalism, suicide, murder and many more topics presented in a fun and child friendly way. Ika-chan is kind of like a mix of Whisper and Jibanyan personality wise now that I think about it. Heck she would probably totally fit in the Yokai Watch cast. 

Both feature Youkai (Japanese monsters, spirits and demons), though Gegege is closer towards the original definition of scary. They each have a different take on Youkai, with Gegege being more traditional, while Youkai Watch has a more modern approach and setting. Gegege no Kitarou is a long-running series in Japan. Both anime are relatively obscure outside Japan, so it might be difficult to find translations. While Gegege is more about the lives of Youkai being what they are, Youkai Watch is about a human boy interacting with Youkai. 

Literally has the same storyline as 'Appli Monsters.' In fact, the series starts exactly how Youkai Watch did. 

Beacuse there is similar creatures in both of them. Yokais and monsters. The main chacacter remeber a lot Nate and monster remember Jibanyan. They are Kodomo anime I hope... The adventure is good, in this case, Yokai watch is better but I´ll watch MHS 

If you're into yōkai lore, you'll really love both Hanako-kun and Yōkai Watch. Not only are both shows about yōkai. They're also both mostly episodic with a new yōkai being introduced each episode. In both series the protagonist has to befriend the yōkai that are causing trouble for their classmates and family. (Well, just classmates in the case of Hanako-kun.) Both protagonists have a yōkai assistant who claims to be more knowledgable about other yōkai then he actually is.