Oyama is a city located in Tochigi, Japan.
As of 2008, the city has an estimated population of 162,283 and the density of 946 persons per km². The total area is 171.61 km². In 2006 Oyama became the second most populous city in the Tochigi prefecture, with the capital of the prefecture Utsunomiya retaining the number one spot. It is considered a city in the fringes of Greater Tokyo.
The city is blank">centred around Omoigawa River and _Oyama Station includes a platform for the Tohoku Shinkansen, or bullet train.
Oyama was given city status on March 31, 1954.
The mayor of Oyama is Toshio Okubo.
One of the major employers in the city is Komatsu making iron castings, diesel engines, fork lift trucks and other hydraulic equipment.
Oyama formally signed a sister-city agreement with Cairns, Australia on May 15, 2006.
