It doesn't have Lisp(that means very limited customization
is available). Since you can invoke it very quickly
(compared with real GNU Emacs), it is useful in dealing with
changing small file a bit.
Ng(Nihongo Micro Gnu Emacs) is a Mg(Micro Gnu Emacs)'s
japanese port. Ng supports EUC, JIS and SJIS code.
Ng also have (rather simple) C-mode.
It is also very useful even if you don't need Japanese support.
Submitted in PR 11240 by Jun Ebihara <jun@soum.co.jp>