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

Calculating dependencies ... done!
Dependency resolution took 1.09 s (backtrack: 0/20).

[ebuild  N     ] net-libs/mbedtls-2.28.10:0/7.14.1::gentoo  USE="threads -cmac -doc -havege -programs -static-libs -test -zlib" CPU_FLAGS_X86="sse2" 3408 KiB
[ebuild  N     ] dev-scheme/gauche-0.9.15-r1:0/0.98::gentoo  USE="ipv6 -test" 9224 KiB
[ebuild  N     ] app-text/mecab-0.996-r2::gentoo  USE="unicode -static-libs" 1366 KiB
[ebuild  N     ] app-dicts/mecab-ipadic-2.7.0.20070801-r1::gentoo  USE="unicode" 11922 KiB
[ebuild  N     ] dev-scheme/gauche-mecab-1.0.2-r1::gentoo  13 KiB

Total: 5 packages (5 new), Size of downloads: 25932 KiB