Ōtsu, located in Shiga Prefecture, Japan, serves as the capital city and is situated on the shores of Lake Biwa, the largest freshwater lake in Japan. With a population of approximately 345,070, it plays a significant role in regional governance and culture. The city is known for its historical significance, beautiful landscapes, and proximity to Kyoto, making it a vital hub for both residents and tourists alike. Ōtsu's rich heritage, combined with its modern amenities, makes it an attractive destination for those exploring the heart of Japan.

Ōtsu has a rich history that dates back to ancient times, originally serving as a key post town on the Tōkaidō road. It became a prominent cultural center during the Heian period and has maintained its historical significance through the centuries.

Ōtsu's economy is diverse, with key industries including tourism, manufacturing, and services. The city's location near Lake Biwa and its historical sites attract visitors, boosting local businesses and contributing to the overall economic vitality of the region.

Tourism in Ōtsu is vibrant, with visitors drawn to attractions such as the stunning Lake Biwa, historic temples, and traditional festivals. Key sites like the Enryaku-ji Temple and the Biwako Valley offer breathtaking views and recreational activities, making Ōtsu a perfect blend of culture and nature for travelers.