Most Japanese DDR games have a far superior songlist. (I say most because I think the US DDRMAX is better than the JAP one). For instance the Jap DDRMAX2 has all the challenge songs along with most of their respective normal versions. DDRExtreme JAP also has about 110 songs, including all the new arcade songs (except for senorita) and a whole bunch of revivals from 1st mix up.
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