Every town/city/region in Japan is famous for something in the souvenir department. The best souvenirs ( omiyage ) to buy in Iwakuni is:
Iwakuni Pottery - mainly tea ware.
Anything to do with the Kintai Bridge or the White Snake .
Iwakuni Sushi - they say it is a taste unrivaled... I dunno!!
Ayu Cuisine - Ayu is a sweetfish caught in the Nishiki River.
Agricultural products: lotus root, chestnuts and shiitake mushrooms.
Telephone code for Japan is: 81
Telephone code for Iwakuni is: 0827
When calling from overseas dial: +81-827