diff --git a/src/Main.cc b/src/Main.cc
index 86ecc09b..7306a94a 100644
--- a/src/Main.cc
+++ b/src/Main.cc
@@ -1142,6 +1142,13 @@ Action a_extract_bml("extract-bml", "\
     PC/BB format.\n",
     a_extract_archive_fn);
 
+Action a_decode_sjis(
+    "decode-sjis", nullptr, +[](Arguments& args) {
+      string data = read_input_data(args);
+      string result = tt_sjis_to_utf8(data);
+      write_output_data(args, result.data(), result.size(), "txt");
+    });
+
 Action a_decode_text_archive(
     "decode-text-archive", nullptr, +[](Arguments& args) {
       string data = read_input_data(args);