. "Kosei means \"navigation and life\". The name was chosen after both of his paternal great-grandfathers. His middle name, Ryu, was chosen after his paternal grandfather, and it means \"dragon\" or \"imperial\". The first meaning could refer to his ability of dragon mimicry. His surname means \"autumn mountain\"."@en . . . "Kosei Akiyama"@en . . "Kosei means \"navigation and life\". The name was chosen after both of his paternal great-grandfathers. His middle name, Ryu, was chosen after his paternal grandfather, and it means \"dragon\" or \"imperial\". The first meaning could refer to his ability of dragon mimicry. His surname means \"autumn mountain\"."@en . .