nkferl
nkf library implemented in NIFs for Erlang.
Build
$ rebar3 compileUsage
encode the string:
1> {ok, Str} = nkferl:nkf("-s", <<"寒くなると、山の手大通りの露店に古着屋の数が殖える。">>).
{ok,<<106,139,104,1,113,110,75,39,26,138,110,50,151,107,
228,64,75,110,112,76,150,72,0>>}guess the encoding:
2> nkferl:guess(Str).
{ok,<<"Shift_JIS">>}