Notice of Temporary Closure During Golden Week 

Dear valued customers, 

Please be advised that our office will be closed for Japan's Golden Week public holidays on Tuesday, 29th April and from Saturday, May 3rd to Tuesday, May 6th, 2025. During this period, there may be some delay with orders and inquiries, and these will be processed when we are open. We appreciate your understanding and patience, and we look forward to serving you when we are back in the office. 

[Caution when paying by credit card]

DISCOVER credit card holders: your card does not support 3D security system, please use another credit card.

In order to deal with recent security issues, Saisei Pharma has introduced 3D Secure 2.0 into its payment system.
Along with that, there is a possibility that problems may occur in some environments on the card payment screen at the time of purchase.
Please reload the screen of your device so that you can use our site in the latest state.

Information for US and Australian/NZ customers

Saisei Hawaii USA and Saisei Australia have started accepting orders from individuals and distributors. Note: some products are only available from our Japan store.