Matsumoto is a designated core city located in Nagano Prefecture, Japan, situated within the Matsumoto Basin of central Honshu. It lies approximately 75 kilometers south of Nagano City and 167 kilometers from central Tokyo, surrounded by the 3000-meter Hida Mountains to the west. The city serves as a regional commercial center and administrative hub for the surrounding municipalities in the eastern end of the Japan Alps.

The area developed as the castle town of Matsumoto Domain under the Tokugawa shogunate during the Edo period, having previously served as the provincial capital of Shinano Province from the Heian period onwards. Modern Matsumoto Town was established on 1 April 1889 with the creation of the municipalities system and was raised to city status on 1 May 1907. It has undergone significant expansion through multiple annexations, becoming a core city with increased local autonomy on 1 April 2021.

The city is best known for Matsumoto Castle, a National Treasure built more than 400 years ago and one of Japan's twelve original castles. Other notable landmarks include the Hayashi Castle ruins from the Sengoku period and the Kamikōchi mountain area to the west. The urban landscape features the historic Kiso Valley along the Nakasendo route and a statue of a girl with a violin commemorating Shinichi Suzuki, who lived in the city later in life.

Matsumoto attracts visitors through its traditional culture, moderate climate, and local products such as Matsumoto soba. Key attractions include the Kaichi School Museum, which houses the first middle school in Japan, and seasonal tourism to surrounding onsen hot spring resorts. The city also hosts the Saito Kinen Festival every August and features projection mapping events at the castle, drawing significant tourist numbers during both summer and winter seasons.

As of 2021, the population is 239,115. The economy relies on traditional woodworking, silk spinning, electronics, dairy industry, and tourism. Matsumoto is served by Matsumoto Airport with limited domestic routes, while rail access via the JR Shinonoi and Ōito Lines connects it to Tokyo and Nagoya. The city experiences a humid continental climate with hot summers and cold winters, averaging 12.2 °C annually.