Ajinomoto Co. is considering selling Amoy Food Ltd., the century-old company that makes Hong Kong's most popular brand of soy sauce, according to people with knowledge of the matter.

The Tokyo-based seasoning company is working with an adviser to gauge potential buyers' interest, according to the people, who asked not to be identified because the information is private.

A sale of Amoy, which began producing soy sauce in China in 1908, could fetch about $70 million to $80 million (¥7.6 billion to ¥8.7 billion), the people said.