Tadashi is a Japanese given name of uncertain etymology, although it is believed to mean "healthy" or "pure". It is traditionally given to boys and has been used by several notable individuals in Japan. One famous bearer of the name is Tadashi Yamaguchi, a Japanese manga artist known for his work on the series "Golgo 13". Another notable figure is Tadashi Yanai, the founder and CEO of Fast Retailing, the company behind brands such as Uniqlo. The name Tadashi has also been used in popular culture, most notably in the Pixar film "Big Hero 6", where it is the given name of one of the main characters, a robotics prodigy named Tadashi Hamada.
"Tadashi has seen fluctuating popularity over the century, peaking between 1917 and 1924 with over 30 births annually, but declining significantly by the mid-20th century. Since 2005, it has experienced a slight resurgence, with around 5 to 19 births per year."