Toyama (富山市, Toyama-shi; Japanese pronunciation: [toꜜ.ja.ma, to.ja.maꜜ.ɕi]) is the capital city of Toyama Prefecture, Japan, located on the coast of the Sea of Japan in the Chūbu region on central Honshū, about 200 km (120 mi) north of the city of Nagoya and 300 km (190 mi) northwest of Tokyo. As of 1 September 2025^[update], the city had an estimated population of 402,015 in 188,064 households, and a population density of 323 persons per km². Its total area was 1,241.77 square kilometres (479.45 sq mi). The city has been designated an environmental model city by the national government for its efforts to reduce the emission of greenhouse gases.

Located in the middle of its prefecture, Toyama is a seaside city by the coast of the Sea of Japan. Its municipal territory borders with the Gifu Prefecture and with the municipalities of Imizu, Namerikawa, Tonami, Nanto, Hida and Takayama. The nearest towns are Imizu (west), and Namerikawa (east), both by the sea and part of the Toyama urban area. The nearest major city is Kanazawa, the capital of Ishikawa Prefecture, which is 65 km (40 miles) away.

Toyama has a humid subtropical climate (Köppen climate classification Cfa) with hot, humid summers and cool winters. Precipitation is abundant throughout the year, particularly in July, September and from November through January. Despite winter in Toyama being relatively mild, its position near the Sea of Japan places it within the heavy snow belt of Japan and on average 3.8 m (12 ft) of snow falls each season, almost all of it from December through March, as well as occasionally experiencing some tremendous amounts of snowfall.

The area of present-day Toyama city was part of ancient Etchū Province. The Toyama Plain is good farmland and historically it was a point of strategic and traffic importance since prehistoric times.

During the Sengoku period, it was frequently a battlefield, coming under the control of warlord Sassa Narimasa, who built a castle town around Toyama Castle and channeled rivers to bringing about a flourishing agricultural industry.

The area subsequently became part of Kaga Domain under the Maeda clan during the Edo period, during which time a positive industrial promotion policy was implemented on the production of Chinese medicine and washi (Japanese paper). Also, thanks to the improvement of kitamaebune sea transportation routes, these industries thrived and Toyama became known nationwide as the province of medicine.

After the Meiji Restoration, with the creation of the municipalities system, the city of Toyama was established on April 1, 1889, as one of the first 30 cities in Japan. Economically, the area developed heavy and chemical industries based on abundant hydroelectric electricity. Toyama has become one of the most influential cities on the Sea of Japan with its good water supply, drainage system and thriving agricultural, forestry, fishery, commercial and manufacturing industries.

During World War II, Allied prisoners of war (POWs) were sent to Toyama as forced labor. The city was almost completely destroyed on the night of August 1–2, 1945. At the time of the bombing, the city was a center for aluminum, ball-bearing and special steel production. Left unscathed however, were the war-related factories just outside the city. The city during the time had a population of around 150,000 residents. The city also held Kakure Kirishitan, or "Hidden Christians" in Japan, forced from Nagasaki into internment camps after the Tokugawa government tried to punish them for their Christian beliefs.