According to Official Guinness Records,
The largest Inarizushi weighed 114 kg (251.33 lb) and was achieved by Kyoto an Co. Ltd. (Japan), in Miwa town, Fukuchiyama city, Kyoto, on 22 May 2011.
The Inarizushi was created as a replacement for a wedding cake during a wedding ceremony as a special gift from the manufacturing company that produces Japanese-style prepared foods and processed soybean foods. The Inarizushi was weighed on a dish that weighed 23 kg. The total weight of the Inarizushi and the dish was 137 kg, meaning the Inarizushi weighed 114kg. The Inarizushi is 120 cm (47.24 in) in length, 70 cm (27.55 in) in width and 45 cm (17.7 in).
For a complete list of 2011 records, please visit 2011 Guinness Records in Japan.