Strictly speaking, a person who seeks romantic relations with Asians.
Cmmmonly, a short or scrawny white male lacking self-esteem and/or assertiveness who seeks power in interpersonal relationships by attempting to date Asian females whom he perceives to be submissive and obedient.
Also, a white male with a prurient but ironically inaccurate fascination with what he perceives as exotic.
Man, Michael is such a fucking rice chaser -- he keeps going to Thailand to get laid.
Someone who like Asian culture and Asian people.
Brian has a crush on Shiori, therefore, he is a Rice Chaser.