Amazon is one of the world's largest e-commerce platforms, with multiple sites, including Amazon US, Amazon UK, Amazon Germany, Amazon Japan, etc. The registration process and requirements for each Amazon site may be different, so which site is easier to register depends on your specific situation and needs.

Generally speaking, Amazon US site (Amazon.com) is one of the largest and most commonly used sites, with relatively simple registration and global sales opportunities. However, considering different international trade regulations, product standards and competition, registering Amazon US site may require more preparation and compliance requirements.

In addition, choosing to register other international sites of Amazon can also be determined based on your target market and product positioning. For example, if your products are mainly for the European market, registering Amazon UK site (Amazon.co.uk) or Amazon Germany site (Amazon.de) may be more appropriate.

No matter which Amazon site you choose to register, it is recommended to learn about the registration requirements, procedures and fees of the site in detail before registration, and ensure that your products meet the relevant standards and regulations. If you have special needs or questions, you can contact Amazon's customer service or seek help from a professional Amazon registration service provider.