Sequin is a stand-alone software tool developed by NCBI for submitting entries to the GenBank, EMBL, or DDBJ sequence databases. Sequin version 2.60 for Macintosh, PC/MS Windows, and Unix Computers are available from the DDBJ ftp site.
Please refer to for details about sequin.
(Attention: Although the latest version of Sequin is 2.70, please use version 2.60 when you submit your data to DDBJ.)