Firstly, the customer only bought one sample. When he placed the order, he did not mention any requirements for product certification. When I asked him, he refused to answer. Secondly, we have batteries that meet Japanese requirements, but we have a minimum order quantity requirement. However, the customer said that he could not buy so many, so we could not accept their order. Thirdly, we are a wholesaler, not a retailer. What certification is required is a problem that retailers selling in Japan need to understand. This is not a problem of the factory. In summary, this customer is very unprofessional. He does not understand it himself. He did not say anything when I reminded him before placing the order, and only shirked responsibility.