In the city of Iwate, well-known for its Nambu ironware technique and considered art form dating back to the Heian period between the year 794-1185. Oigen foundry have been using the same techniques for the past 150 years. Oigen is proud of its craftsmanship that produces each good by hand, one by one and imprinting a unique number for each one. As cast iron goods popularity rises for its benefits of boiling water extremely quickly, elimination of some chemicals in tap water due to chemical processes with the iron and also reduction of unpleasant smells. Oigen became well-known throughout the world for its rooted history and traditional practices by casting in a fine grain sand the ironware has a renowned smooth and unblemished surface. Oigen's ironware is made with recycled material and can last for more than 100 years with proper care. Oigen maintains its history, traditions, quality, and designs throughout the years to bring the best Japanese ironware to the world.