I read somewhere that you can use risotto rice for sushi if you

I'll use calrose rice for Japanese style rice. I even see some calrose rice marketed as Japanese rice at the Asian supermarket.

As far as I'm aware, yeah. I'm not saying grain size and flavor mean nothing, but rice is rice. Throw some basmati in a rice cooker, it'll come out looking like weirdly proportioned sticky rice. Cook it like sushi rice, it'll act like sushi rice.