Hideo was born in Brazil to a Japanese father and a Brazilian mother. At the age of 16, he began modelling and started travelling to different countries, mainly around Southeast Asia. He later got married to the Spanish fashion model Fatima Rabago who later gave birth to their daughter, Daniela.
In 2007, together with his wife and his newborn daughter, Hideo immigrated to the Philippines where he continued his career in the Philippine modelling industry. He immediately became one of the top male models in the Philippines and was featured in several magazines and commercials, around the Southeast Asia region.
Hideo Muraoka was a Celebrity Housemate during the Celebrity Chapter of Pinoy Big Brother 7.