diff --git a/README.md b/README.md
index f1f92e7..1768ef3 100644
--- a/README.md
+++ b/README.md
@@ -16,6 +16,9 @@ Vietnamese Telex is also available as a compatibility mode.
 | `Ctrl+E` | Emoji and symbol search |
 | `Ctrl+H` | One-shot Hanja search |
 
+A Korean keyboard's 한/영 key toggles Korean and English, and its 한자 key
+is `Ctrl+H`.
+
 A complete Japanese reading shows its Kanji candidates with none chosen.
 `Space` chooses the first and then steps on, wrapping (`Shift+Space` steps
 back); `Up`/`Down` and `PageUp`/`PageDown` move without wrapping. An
diff --git a/ipc.h b/ipc.h
index 67ff230..3bedfd9 100644
--- a/ipc.h
+++ b/ipc.h
@@ -39,6 +39,8 @@ enum
 	Kdown = Kspec|0x54,
 	Kpgup = Kspec|0x55,
 	Kpgdown = Kspec|0x56,
+	Khangul = Kspec|0x31,
+	Khanja = Kspec|0x34,
 	Kmodfirst = Kspec|0xe1,
 	Kmodlast = Kspec|0xee,
 
diff --git a/strans.c b/strans.c
index da368cb..5712855 100644
--- a/strans.c
+++ b/strans.c
@@ -682,6 +682,14 @@ transition(u32int ks, u32int mod, Str *com)
 		ks = kokey(ks, mod);
 	else if(isjp(&im) && ks >= 'A' && ks <= 'Z')
 		ks += 'a' - 'A';	/* romaji is case-blind, Caps Lock included */
+	/* The Korean keyboard's 한/영 and 한자 keys are Ctrl+S or Ctrl+T, and Ctrl+H. */
+	if(ks == Khangul){
+		ks = im.l->lang == LangKO ? 't' : 's';
+		mod = Mctrl;
+	}else if(ks == Khanja){
+		ks = 'h';
+		mod = Mctrl;
+	}
 	if(search.lang)
 		return searchkey(ks, mod, com);
 	n = movedelta(ks);
diff --git a/tests/engine_test.c b/tests/engine_test.c
index 48fe708..7dcf3ec 100644
--- a/tests/engine_test.c
+++ b/tests/engine_test.c
@@ -1855,6 +1855,22 @@ engine_hanja_input_languages(struct ct *t)
 	checkstr(t, "Japanese Hanja commit", "か", &com);
 	CT_EQ_INT(t, LangJP, im.l->lang);
 
+	/* The keyboard's own keys: 한자 seeds like Ctrl+H, 한/영 toggles. */
+	init();
+	im.l = getlang(LangKO);
+	sclear(&com);
+	if(typekeys(t, "gks", &com)){
+		CT_CHECK(t, keystroke(Khanja, 0, &com));
+		checkstr(t, "Hanja key seed", "한", &search.text);
+		CT_EQ_INT(t, 2, im.nkouho);
+		CT_CHECK(t, keystroke(Khangul, 0, &com));
+		checkstr(t, "Hangul key commits the query", "한", &com);
+		CT_EQ_INT(t, 0, search.lang);
+		CT_EQ_INT(t, LangEN, im.l->lang);
+		CT_CHECK(t, keystroke(Khangul, 0, &com));
+		CT_EQ_INT(t, LangKO, im.l->lang);
+	}
+
 	init();
 	im.l = getlang(LangEN);
 	sclear(&com);