diff --git a/wtf_tradition/to_hankaku.py b/wtf_tradition/to_hankaku.py
new file mode 100644
index 0000000..b2a28a4
--- /dev/null
+++ b/wtf_tradition/to_hankaku.py
@@ -0,0 +1,11 @@
+import argparse
+import unicodedata
+# TODO: normalizeなので半角カナが残らない
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+    parser.add_argument("zenkaku")
+    args = parser.parse_args()
+
+    hankaku = unicodedata.normalize("NFKD", args.zenkaku)
+    print(hankaku)
diff --git a/wtf_tradition/to_zenkaku.py b/wtf_tradition/to_zenkaku.py
new file mode 100644
index 0000000..cd38f92
--- /dev/null
+++ b/wtf_tradition/to_zenkaku.py
@@ -0,0 +1,16 @@
+"""
+$ python to_zenkaku.py spam42ﾊﾑ
+ｓｐａｍ４２ハム
+"""
+
+import argparse
+
+import jaconv
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+    parser.add_argument("hankaku")
+    args = parser.parse_args()
+
+    zenkaku = jaconv.h2z(args.hankaku, kana=True, ascii=True, digit=True)
+    print(zenkaku)