APMcDonald's Japan has apologized after a human tooth and plastic pieces were found in the chain's food.
The company said a human tooth was found in a customer's french fry in August and that another diner found a 1.5-inch strip of vinyl in a Chicken McNugget over the weekend.
In a third recent case, a child's mouth was injured by a piece of plastic in an ice cream sundae.
"A child suffered a mouth injury from a piece of plastic. We are deeply sorry for this," McDonald's Japan Senior Vice President Hidehito Hishinuma said at a press conference Wednesday, CBS reports.
The company said it is investigating how the items ended up in its food.
"To make such cases zero is our goal," said Takehiko Aoki, a senior executive. "We are doing our utmost to tackle them, one by one."
Aoki said he is confident that his family can eat McDonald's products, despite the incidents.