kanji_convert    7018 ext/nkf/nkf-utf8/nkf.c 	    kanji_convert(stdin);
kanji_convert    7108 ext/nkf/nkf-utf8/nkf.c 		    kanji_convert(fin);
kanji_convert     168 ext/nkf/nkf.c      kanji_convert(NULL);
kanji_convert     203 ext/nkf/nkf.c      kanji_convert( NULL );