All the iLiLiP purchase of a jewellery over $100 are including the shipping of Japan Post registered - signed for - which would take 6 days or more depends on your location and its customs from my experience.
FedEx International Economy service is for someone who expect a fast and more reliable international shipping.
Time definite, customs-cleared, typically in 4 to 6 business days.
Monday to Friday
Ships to more than 200 countries and territories.