Summary: Because DDBJ mirrors its information daily with GenBank and EMBL, beginning sequence searchers might want to try a database with a friendlier searching interface. However, DDBJ also offers all of its pages in Japanese as well, so if you are more comfortable reading the Japanese versions of the pages, it can be very useful.
DDBJ, the DNA Data Bank of Japan, was established in 1986 to be one of
the major international DNA Databases (with GenBank and EMBL). It is
certified to collect information from researchers and assign accession
numbers to submitted entries.