Tip the rice into your hangiri, a large flat bottomed bowl or roasting pan and spread it out. Pour over the rice seasoning and gently stir it through the rice using a slicing gesture. Your aim is to cool down the rice as quickly as possible without breaking up or mashing the grains.
Stand in front a fan, AC unit or use a hand fan as you stir the rice. This will help it cool down as quickly as possible. Keep mixing until the seasoning is mixed through and the rice looks shiny.
Wait until the rice is cooled to room temperature before using it. You can cover the hangiri / bowl with a damp towel so it doesn't dry out.