The ftp resources at ftp://ftp.ddbj.nig.ac.jp are also accessible by https.
https://ddbj.nig.ac.jp/public/
The ftp and corresponding https addresses are as follows.
ftp://ftp.ddbj.nig.ac.jp/ddbj_database/tsa/IC/ICRJ.gz
->
https://ddbj.nig.ac.jp/public/ddbj_database/tsa/IC/ICRJ.gz