Gake no Ue no Ponyo

Both mention the story of a goddess and are in a island. Both have a character that can live under water. Water,friendship and the goal to save a place after a calamity arrives are the central themes.  

Both are about the sea Both animate scenes similarly. Both have a sci-fi twist Similar art and scenery. 

The coast, the sea, and fish! Both have swell water animation and light-hearted. 

Both have stunning oceanic animation, making use of many bright and bold colors, with an 'alien'-ish character living with a human. Fun and uplifting. 

-Perfect vibe for summer break!--heartwarming and happy seaside fun -fish, that are people, that are actually fish, that are really treasured friends (@_@) fish are friends, not food? -Beautiful scenes centered around the magical, mystical ocean, -and protective fathers -friendly, welcoming mother figures -flooding of a village -being lost at sea -being friends forever 

Both are light-hearted with nice colour palettes, set close to the ocean, and about a friendship between a human and a fish taking the form of a human (strange as that sounds) They're both nice and short to watch when you feel down, though Tsuritama is a 12 episode series while GUP is only a movie. 

Both about fish with supernatural powers both take place near the sea and nice visuals  

In both Ponyo and Tsuritama, they are both set in a peaceful fishing town. Until overtaken by aquatic life under the control of a magical power, they must set out to try and restore peace to the land. Both series seem to bring out a bit of an innocent and adventurous young spirit. 

- Both about a relationship between a male human kid and a childish female sea creature. - Both contain warm and colorful visuals. - Both films have a family atmosphere. - Both Events happening in a town by a sea.  

When I saw Yoake Tsugeru Lu no Uta, all that I could thought was "this is some kind of reboot of Ponyo"(I´m not saying this in a bad way). It´s almost the same history, a boy found a fish girl and stablish a relationship with her, the looks of Lu and ponyo are pretty similar and their personalitty it´s similar also, the magic of imposible water it´s a focus in both films, there is even a pretty obvious conection with both fathers but it would be spoiler. But anyway I would tell that Yoake Tsugeru Lu no Uta it´s some kind of a little (just a little) more mature Ponyo, the beginging it´s a little depresing, the colors are a little more sad, there are more toopics included, more plots, more importance in characters. A little more raw and disturbing scenes but just a Little (a kid would not have a problem seeing this anyway). There is actually an easter egg of three seconds were Sosuke from ponyo apeared, it shows that it was intentional to be related with Ponyo and also it shows that it was made with love and respect for Ponyo. Basically if you loved Ponyo and you want to look something like Ponyo 2, this is the most similar option that exist for that.  read more 

Both are family-friendly films that have a mermaid girl and a human boy as the two main characters. If "Ponyo" is only loosely based on the Hans Christian Andersen story, "Lu Over the Wall" is even further removed. Both stories take you to places you never imagined you'd end up at, though in different ways in accordance with the styles of their respective directors. Whatever else I could say, others before me have said better. 

Both are very heart warming stories about the relationship between a boy and a little mermaid. But as a work of Yuasa Masaaki, you should expect it to be more mature themed and have unusual art style. 

This might be the obvious choice. Both Yoake Tsugeru Lu no Uta and Ponyo are about a boy who befriends a mermaid. Both mermaids have an innocent outlook on the world, and they both became instantly attached to their human friend. Both mermaids have a protective father, and both humans are raised by a single parent. (Kai's mother living away in Tokyo, and Sosuke's father being out fishing.) Also both films contain a great flood. In Ponyo the flood is caused by the Ponyo being taken from the sea, and in Yoake Tsugeru Lu no Uta, it's caused by Lu and her father being nearly killed. read more 

- They're both about events happening at a town by the sea - They are both about a relationship between a male human and a female sea creature. - They're both family friendly  

Both have a childish, innocent and sympathetic story and both are directed by Hayao Miyazaki, if you liked Totoro hardly will not like Ponyo. 

Ponyo is a really sweet, gentle family film by Ghibli, involving a plot centred around magic and two adorable main characters.  

"Ghibli vibe". Because that is the most logical thing to use when recommending two Ghibli titles. I suppose the similarity with these two however is that MC moves to a house that allows for magical beings to arise, that dominos into a dive (sometimes literally) into a deep (also sometimes literally) world of the mystical side of life. I suppose one could look at these two as being that fantasy everyone has as a kid or adverts like to push forward. If Ghibli's name doesn't sell these two movies to you, then I don't know what will. Great with the family. 

These movies are both Studio Ghibli fantasy movies. 

Theyre both cute animes with cute little characters and good for kids 

Ponyo and Spirited away are very similiar when it comes to the overall feeling. Its very cute and mysterious. And you really love the maincharacters in both. While Spirited Away is a bit more serious both are very lighthearted anime movies. Also Studio Ghibli made both. 

both are Ghibli films 

"Ghibli vibe". Because Ghibli seems to bring forward a connection like no other studio. In a more concise outlook, the two titles have female child protagonists who seem to be working the hardest in going onward with their quest. I suppose this is less true in Ponyo, with it being more of a duo effort, but I do believe it stands how both female MCs in each movie does push forward more so than others I have seen, especially for such littluns. If Ghibli's name doesn't sell these two movies to you, then I don't know what will. Great with the family. 

Both have mythical creatures, cute fantasy story involving water and sea 

stunning worldbuilding and animation, supernatural sea-fish-human relationships 

Movies about relationship between a sea and non-sea creature, both having general artstyle similar to oldschool cartoons for kids, arstyle that might be kid-friendly but it aesthetically pleasing to adult watchers too. 

"Ghibli vibe". Because there honestly isn't anything else to use as a means of relating the two. They follow general Ghibli tropes of the main girl undergoing some kind of subtle magical adventure usually revolving around the elegant supernatural and meeting friendly dudes on the way who wish to help on the quest. I suppose I could also add to the fact that both anime have the two female protagonists manifesting the ability to shapeshift (not wildly), and the only means for motivation on this adventure, is to turn back to normal. If Ghibli's name doesn't sell these two movies to you, then I don't know what will. Great with the family. read more 

Crossing. Ponyo and A Whisker Away both follow young people who have the ability to go between human and animal forms. Ponyo doing this with half-fish half-human Ponyo. Whisker Away does this with Muge's mask of switching between a cat and a human. Both are good anime movies with Ponyo being much more lighthearted in comparison to the drama Whisker Away brings.  

Vast friends. Ponyo and Kiki's Delivery Service both have the same relationship in coordinating friendship relations between different kinds of people. With Ponyo, half-goldfish half-human girl Ponyo befriends human Sousuke. Delivery Service does a similar trick with the witch Kiki and humans she comes across, namely Tombo and Ursula. Both are good anime family movies made by Studio Ghibli and directed by Miyazaki Hayao.  

Both are stories mainly for kids about kids and their adventures at the sea. 

Similarities - Both series have abstract ocean creatures that visit land - Both series have a child main character that lives near the short and interacts with the ocean creatures/phenomenon - Both series have colorful, abstract art and animation Differences - Ponyo is a film and Deji Meets Girl is a shorts - Ponyo main character that lives near the short is a male VS Deji is a female; The gender roles are swapped.  

Runaway. TnK and Ponyo are quite similar to each other in other cases other than the motif of water, both featuring a runaway of some kind who ends up acquainting with their deuteragonist (could look at them as the protagonist as well), commencing forth on an adventure full of the supernatural miracles. Ponyo does this with a mermaid(-ish) girl named Ponyo living with a newly found friend of hers Sousuke, the two go on an adventure to make Ponyo become human, compared to a lively presented TnK which has Hodaka and Hina go around and change people's lives with this discovery of her superpower, dubbed as a "sunshine girl" role. Both are great anime movies you can watch with just about anyone, having an incredibly good production, made by awesome directors Miyazaki and Shinkai respectively. read more 

Half and halves. Ponyo and Wolf Children both follow human caring for a hybrid of humans and some other creatures. In Ponyo, it is half-fish half-human. In Wolf Children it is half-wolf half-human. Both are great visual works about how people aid others even with the little power they themselves have in the first place.