Kojima described his father as a chemist involved in the development…

“There was a period, before my Father died, where I thought I'd become an artist, but my Father died very suddenly when I was 13. My family was full of artists, you see, and they hadn't been able to make a living off of it.”

“The truth is that because my dad died, I was able to get into the game industry. ... If my dad was alive, he'd have been opposed. He was a very scary man.”

“My mother was the only one who didn't object for some reason. "If you want to pursue it, that's fine."”

Kojima regarded the primary family form as a unit of four: his parents, his brother two years older, and himself. After moving from Tokyo toward Kansai, his parents built a house in 1970 in a new development in Hyogo, distant from grandparents and other relatives; Kojima’s father presented that house as where they were starting and from which their children could also begin. They did not have the typical suburban dog because Kojima’s mother had asthma.

“Ourselves, we're like the people who made their own films before making it big in Hollywood. I think we've got the skills we need to make anything we want, anywhere we want, on any budget we want. That's where my pride, or my confidence, comes from.”