Oomizo (its administrative address is Katsuno) is a quiet, scenic country town located at the southern part of Takashima City.
The area has played an important role for transportation on the lake since ancient times. It has also been important in a military sense, as the entire northern expanse of Lake Biwa can be seen from the nearby Mio mountains.
Oomizo flourished until the post-war when most goods were transported over the lake, but with the shift to ground transportation the bustle has gradually waned.
However, the area and its history has regained attention after being appointed as an important cultural landscape in 2015.
The area appointed as an important cultural landscape is conveniently located within walking distance of the JR Omi-Takashima Station, and offers waterfront scenery distinctive even for Shiga prefecture.
The main sights include the Sengoku period stone walls belonging to the Oomizo castle near Lake Biwa, the Uchi-Oroshi hamlet and Otome-ga-Ike pond to the southeast of the castle, and the whole townscape of Katsuno to the northwest from there.
Furthermore, the culture of connecting the people and the waters of Lake Biwa were recognized as a Japan Heritage in April 2015 with the theme “Lake Biwa and Its Surroundings: A Water Heritage Site of Life and Prayer”. Oomizo waterfront scenery was selected as one cultural asset belonging to this cultural collection.