There is little difference between the international registration fee and the single registration fee in Madrid. However, if Japanese trademarks are handled through Madrid, they will often issue review opinions due to different product classification requirements. Because the audit opinion must be entrusted to a local Japanese lawyer, the cost will be much more expensive than a single registration. Therefore, it is more appropriate for Japan to handle it through a single registration.
See the website of Ningbo Huicheng Intellectual Property Agency Co., Ltd..