Glass shards found in cabbage, one of which chipped a customer's tooth, have prompted Kentucky Fried Chicken Japan Ltd. to suspend sales of four dishes at 228 of its outlets in Tokyo and nine other prefectures, the company said Friday.

All of the four dishes were prepared with shredded cabbage supplied by a subcontractor. The glass shards came from a broken thermometer inside a refrigerator at the subcontractor's plant in Saitama Prefecture, the fast food chain said.

The four dishes are coleslaw, green salad, fried chicken cutlet sandwich and a minced-meat dish with cheese that were sold Thursday at the 228 outlets in Tokyo, the other six surrounding prefectures in the Kanto region and Shizuoka, Nagano and Yamanashi prefectures, according to the company.

Two customers, both male, told the company Thursday that the food they had purchased at KFC Japan's outlets in Ibaraki Prefecture and Tokyo contained pieces of glass.