Born in Yokohama, 1986.

Graduated from Tama Art University, Department of graphic design (2009).

Graduated at Tokyo University of the Arts, Graduate School of Film and New Media, Department of Animation (2012).

A Wind Egg (空の卵 / Kara no Tamago, 2012) was Ōkawara’s graduation film for the Geidai (Tokyo University of the Arts) graduate animation program.

Kōji Yamamura is/was his Geidai mentor.

https://vimeo.com/user7188026