霞ヶ浦
Ishioka has a diverse economy. Agriculture includes lotus roots, which are cultivated around Lake Kasumigaura, tobacco, and horticulture such as persimmons, mandarin oranges, and strawberries cultivated at the foot of Mount Tsukuba. In addition, the countryside is one of the leading rice areas in Ibaraki prefecture. Pig farming and chicken farming and dairy farming are also major agricultural contributors. The city has an industrial park, with factories owned by Panasonic and Toyo Seikan, among others. "Sake" brewing is a traditional local industry, as is the manufacturing of incense sticks.