This is a Mikimoto pearl necklace. It was sold on JAL flights. The necklace has approximately 6mm pearl beads. The length is about 42cm. The pearls themselves are very clean as they haven't been used much. The box is a little dirty due to aging. It can be used for both formal and informal occasions. I think it's a valuable item to have. It was purchased for around 300,000 yen at the time.