If you're looking for anime similar to Rurimiya Mugen Kobutsuten, you might like these titles.
Holmes, a young man whose family runs an antique shop in Kyoto, has the unique ability to read people and instantly distinguish genuine and high value antiques. When a local high school student, Aoi Maki, starts working alongside Holmes, together they begin to unravel the many mysteries surrounding the antiques brought to the shop.
When Ruka was younger, she saw a ghost in the water at the aquarium where her dad works. Now she feels drawn toward the aquarium and the two mysterious boys she meets there, Umi and Sora. They were raised by dugongs and hear the same strange calls from the sea as she does. Ruka's dad and the other adults who work at the aquarium are only distantly aware of what the children are experiencing as they get caught up in the mystery of the worldwide disappearance of the oceans' fish.
Follows Kimihiko Kimitsuka, a young man who four years ago became the assistant of a mysterious detective known as "Siesta" on a hijacked airplane. Together, Kimihiko and Siesta went on mind-boggling, globe-trotting adventures while combatting a secret organization, but all of that came to an end when they were separated by Siesta's death. In the present day, Kimihiko tries to return to an ordinary, boring life as a high school student, but things are never that simple, even though the detective is already dead.
Modern-day Daoist Fang Yi wakes up one day with a superpower—the ability to sense antiques and artifacts! From there, he becomes an artifact-collecting wonder. Countless treasures all become his, and he leads his band of brothers on a journey to the very peak of life!
The story begins in the early Showa era of the 20th century. A mysterious old man on a train relates the disappearance of his older brother three decades ago, near the 12-story Ryouunkaku tower that once stood in the seaside town of Uozu, Japan. The mystery revolves around telescopes, peep shows, and the blurred boundary between reality and dreams.