Seven-Eleven Japan Co. recorded the largest corporate income during the year that ended in February, staying at the top of the list for the fourth year in a row, a private research company said July 25.

The nation's leading convenience store chain declared 106 billion yen as taxable income, a rise of 8 percent from the previous year. A record 502 stores joined the nationwide chain during the year and fast food, the firm's mainstay business, sold well, according to Tokyo Shoko Research.

Ito-Yokado Co., the parent company of Seven-Eleven and a major retailer, remained second on the corporate income list. Lawson Inc., another convenience store chain, rose one notch to third. Settlements of accounts for the retail industry, including department stores and convenience stores, concentrate in a fiscal year that ends in February.