Honestly im surprised dragonball isnt a priority line and kamen rider is, i never even heard of kamen rider before and ive seen a few of their reviews on youtube of the figures and not to offend anyone but they look super lame and boring compared to dbz lol
Obviously you're not a Japan guy .
Figuarts is Bandai so it's the Japan market first and Kamen rider is huge there (and it's cool too ), Dragon Ball could have been more popular but like Big Deano said the line died/stopped.
It started back because of the US, since then every release is an exclusive for the Japan and regular for the US (Euro have nothing...).