A lean 6'1", he has a compelling look that varies wildly in his photographs from schoolboy naif to prep to bad-boy rocker to Latino matinee idol to very edgy hip-hop. And hip-hop is near to his heart, as is the name of his new music production company "Imazaki Ink" which is tattooed across his back. Other tattoos on his bicep and back include his brother's name, the date of his birth, a Tibetan symbol for reincarnation, and a dragon with the Japanese symbol for 'Magnificent Soldier'.

Seijo's father was Japanese, born in Kyoto the night of the bombing of Hiroshima. After finishing law school in Japan his father went on to attend university in Minnesota, where he met Seijo's Swedish-American mother. Together they settled in Westchester, NY, where Seijo was born. Tragically, Seijo lost his mother at the age of ten and his father at the age of seventeen, not long before he started modeling.