Kuwanaya
A beloved affordable eel restaurant on Lake Ushiku's eel street. Rated No.1 eel restaurant in Ibaraki by Netorabo Research. Locals call it the best in Ryugasaki, the birthplace of unadon. Even the premium eel box is under 3,500 yen—extraordinary value. Weekend wait can reach 2 hours.
Yahoo 4.44/17 reviews. Many specific reviews noting 'charcoal aroma, slightly sweet sauce, depth from accumulated tare'. Local consensus: 'long-time residents say this is the best'. Always has queues with full parking lot.