In Japan a number of teas are commonly consumed iced during the summer. Among the most common are mugicha (barley tea), hojicha (roasted green tea), and among the tea elite kukicha (leaf stem tea).
Tips for making delicious iced tea:
hot steep an extra concentrated amount of tea and ice it to counteract dilution by the melting ice
steep a regular strength tea and freeze it into ice cubes to prevent dilution
cold steep a pitcher of tea using cold water and leaving it overnight in your refrigerator (use 1.5x - 2x more tea than you would for a cup, and use 500 ml - 1 liter of water). It's important to refrigerate it to prevent bacteria from growing!