Main Page | See live article | Alphabetical index 'Iwai'\ (岩井市; -shi) is a city located in Ibaraki, Japan. As of 2003, the city has an estimated population of 42,813 and the density of 471.92 persons per km². The total area is 90.72 km². The city was founded on April 1, 1972. External Links Official website in Japanese This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.