These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 1.01 s (backtrack: 0/20).

[ebuild  N     ] dev-libs/darts-0.32h_pre20181117064816::gentoo  38 KiB
[ebuild  N     ] app-text/chasen-2.4.5-r1::gentoo  USE="-perl -static-libs -test" PERL_FEATURES="ithreads (-debug) -quadmath" 656 KiB
[ebuild  N     ] app-dicts/ipadic-2.7.0-r2::gentoo  4200 KiB

Total: 3 packages (3 new), Size of downloads: 4893 KiB