If you're looking for anime similar to Youjo Densetsu, you might like these titles.
Kagura is a young man who has tragically lost not only his friend, but the woman he loves as well. With only his friend Asami to turn to, Kagura quickly finds his life spinning out of control when he discovers that he is a Spirit User -- one of the Elementalors who command the forces of nature. Now, along with his fellow Elementalors, Kagura must race against the clock to stop Lord Shiki from causing an imbalance in nature by trying to save his long lost daughter, Shiohisa.
Life is tough during the Warring States period of medieval Japan: lords battle lords for control of the country, while samurai and mystical warriors do their bidding from the shadows. Backstabbing and betrayal are common, and legendary ninja Saizou Kirigakure has had enough. He lives only for himself - until a girl with a mysterious dark power falls into his arms. Saizou quickly finds himself dragged into a struggle between powerful warlord Ieyasu Tokugawa, and the strange but alluring Yukimura Sanada. He becomes one of "Sanada's Ten Braves," who use their mystical powers and ninja abilities to protect the people and things they care about the most.
Three shrine maids have a distant cousin who moved away for schooling when they were young. Years later, he returns, and the three girls are tasked with protecting him. During this, the eldest (who's a teacher at the school) and the middle one form a "Miko" council. The story goes through their growth together and their battles with the servants of the Evil God.
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.
A devil wanders the battlefield in the guise of an adorable young child and her name is Tanya Degurechaff! After returning from the sandy southlands, Tanya receives an incredibly suspicious order from headquarters to embark on a training exercise. In reality, command has sent her on a covert mission to initiate a border conflict with the Federation. Soon the Empire finds itself embroiled in another fight it cannot back down from, even if it means making the entire world their enemies!
A genius programmer and hardcore robot otaku is reborn into a world of knights and magic, where huge robots called Silhouette Knights roar across the land! Now reborn as Ernesti Echevalier, he uses his vast knowledge of machines and programming talents to begin to make his ultimate robot. But his actions have unexpected results...?! The dreams of a robot otaku will change the world!
I'm known as the Maou Army’s strongest magician. Like, I have the demonic power capable of capturing a fort alone. Clearing away enemies with immense magic, I am without a doubt a monster awed by friend and foe. However, I have a secret I can’t tell the other demons: I'm actually from Earth. Using modern knowledge to keep my secret, I'm being treated as a great commander and the driving force of the Maou’s army.