We use roasted (toasted) sesame seeds in many Japanese recipes.
If Your Sesame Seeds Are Not Roasted (Toasted)…
If your sesame seeds are not roasted (they don’t have toasty color), you can toast the sesame seeds in a frying pan (no oil) over medium-low heat, stirring occasionally, for 2 to 3 minutes or until the seeds turn light brown, glisten, and occasionally pop.