Rice texture defines East Asian cuisine. Short- and medium-grain (japonica) dominate China and Japan for sensory, culinary, and cultural reasons.
Slightly higher glycemic index than long-grain (indica)—moderate blood glucose impact vs. sharp spikes. Traditional meals pair rice with fiber/protein/fat, blunting response.
Texture harmony (shokkan) is a Japanese aesthetic; Chinese cuisine values "mouthfeel" (kougan). Long-grain's separation feels "loose," "dry," "unsatisfying" in these frameworks.
Thailand, India, Pakistan, Basmati regions prefer long-grain—each grain distinct. No universal "better"—just alignment with cuisine.