On November 1, 2004, the city of Toyo and the towns of Komatsu and Tanbara merged with Saijo. As of this merge, the city has an estimated population of 116,687 and density of 229 persons per kmē. The (merged) total area is 509.78 kmē.
Its capital, Matsuyama, is the largest city on Shikoku, with a population of over 500,000 and an abundance of historical and cultural resources such as the famous Matsuyama Castle and Dogo Hot Spring Spa, the oldest bathing area in Japan.
Ehime, which sounds feminine to Japanese ears and literally means "beautiful maiden", is blessed by a mild climate with an average low of 5.3degrees C (42degrees F)in January and an average high of 27degrees C(81degrees F)in August.
Iyo, the old name for Ehime, is said to have first appeared as the name for the island of Shikoku in the "Kojiki" (Record of Ancient Matters) and the "Nihon Shoki" (Chronicles of Japan), both written in the early eighth century.