Karigurashi no Arrietty

Determined, wonder filled female protagonists, new relationships opposed by their families, stunning art that grips you to the screen with a perfectly placed soundtrack to match! If any of these grab your interest, you're in for a lovely ride with Karigurashi no Arrietty and Sakasama no Patema. These films both follow a young girl's story as she follows her heart and curiosity into a world so close to her own yet mystifying, beautiful, and even terrifying. While Patema approaches with a sci-fi setting and Arrietty one of fantasy, they both carry similar backing themes of family, romance, and adventure, guaranteed to leave your face smiling and your heart warmed. read more 

Both are stories of friendship between people from very different worlds, where one world endangers the existence of the other. Beautiful visuals with stunning soundtracks make these films very watchable. 

The story about around two different human races , in which one of the races is in the verge of extinction due to other , So endangered group live hiding from the other .  

If you like shows about Lilliputians living in a big world, "Hakumei and Mikochi" and "The Secret World of Arrietty" might be just what you are looking for.  

If you liked the story "Karigurashi no Arrietty" about the little borrowers, then I would like to recommend the anime "Hakumei to Mikochi". In the series, very small, human-like creatures are the main characters and both anime thus follow in the footsteps of the famous novel "Gulliver's Travels - The Journey to Lilliput" by Jonathan Swift. The story of "Arrietty" not only borrows from Swift, but also has its own novel or children's book. The borrowers series by the British writer Mary Norton. The two anime each have a very nice art style. However, you have to take into account the difference that "Arrietty" as a film by Studio Ghibli has a very high quality standard and "Hakumei to Mikochi" as a TV production can't quite keep up. But both anime are beautiful to look at and make many everyday objects appear in a fascinating way in a completely different function in the world of the little creatures and show an excellent depiction of the natural environment, plants and insects. The musical score and voice acting are also great, making it very enjoyable to experience the two anime worlds from the perspective of their little inhabitants. As always, thanks for reading and have fun watching.  read more 

Both Arrietty and Hakumei to mikochi follow the lives of very tiny humans. Both have a comparable atmosphere, where the tiny humans use food and objects that are huge for them and small for normal humans. Both are also comparable in the generally relaxing pace and little conflict. Both are a recomendation if you're looking for a cute anime about small people and cozyness. 

Both are by Studio Ghibli. Both are about characters who are the same age and contain fantastical ideas. 

Studio ghibli flavour 

Arrietty and Kiki's Delivery Service don't have much in common, but they both have this calm sense of adventure even though the actions that happen aren't hysterical or drastic. They are both small-scaled adventures in an eased and natural sense. Also, both are good anime family movies made by Studio Ghibli. Great OST and visuals all around.  

Subtly romantic, naive, and melancholic.  

The secret people. The Secret World of Arrietty and Wolf Children both follow protagonists who care for the secret abnormal beings they are associated with. Wolf Children is Hana being a mother for the literal wolf children Ame and Yuki. Arrietty is Shou protecting Arietty and her family from the dangers of some humans. Both are great anime about that even though there are differences in the different kinds of species that live, there can still be bonds built. 

Not only both are Studio Ghibli movies, but generally have very similar theme. In both, young person is going away from city to little house in village/close to the nature to rest and get better. They both make friends with rather strange girl - in Omoide no Marnie it's not a real person, but a memory of person who lived earlier and in Karigurashi no Arrietty it's a very little girl, Thumbelina alike. This friendship changes boy and girl and after this they become more open to the world and stuff. Also, in both we have very good songs in english, touching and heartwarming. Not to mention that the art and landscapes are simply beautiful animated. read more 

With most recommendations already, and mine, there is a Ghibli connection here. Though Secret World and Princess Mononoke have their intimate similarities such as a strong female lead who does everything in their power to better their family. A dude comes along and aids in such a mission as well. You could look at both as two sides of the same coin in some respect. Both are great Studio Ghibli movies, for all to enjoy.