is a Japanese footballer currently playing as a right back for Aries FC Tokyo.
Having played in his native Japan with Tokyo 23 FC, Hashioka was announced as an Albirex Niigata Singapore player ahead of the 2020 season. After two years in Singapore, in which he was named captain for both, he returned to Japan to sign for Aries FC Tokyo.
Kazuki is the older brother of Japanese international Daiki Hashioka.