diff --git a/flat/src/lib.rs b/flat/src/lib.rs
index 81c6f21..1494c91 100644
--- a/flat/src/lib.rs
+++ b/flat/src/lib.rs
@@ -170,7 +170,11 @@ fn hero<'a>(si: usize, f: usize) -> Svgr<'a> {
             // The newest glyph arrives overexposed and settles.
             let fresh = n - 1 - i < 2 && f <= hud::TYPE_END && s.kind == Kind::Typing;
             let fill = if fresh { "#ffffff" } else { "#e9e9e9" };
-            fframes::svgr!(<text x={x} y={s.hero.1} fill={fill}>{c.to_string()}</text>)
+            if hud::is_wide(c) {
+                fframes::svgr!(<text x={x} y={s.hero.1} fill={fill} font-family="Noto Sans CJK SC">{c.to_string()}</text>)
+            } else {
+                fframes::svgr!(<text x={x} y={s.hero.1} fill={fill}>{c.to_string()}</text>)
+            }
         })
         .collect();
     let col = if s.kind == Kind::Cursor { 2 } else { n };
diff --git a/hud/src/lib.rs b/hud/src/lib.rs
index c50bb77..696a817 100644
--- a/hud/src/lib.rs
+++ b/hud/src/lib.rs
@@ -21,6 +21,17 @@ const CHAIN: usize = 5;
 
 /// JetBrains Mono advances 0.6 em per character.
 pub const MONO_ADV: f32 = 0.6;
+/// Chinese/Japanese/Korean and full-width characters take a full em.
+pub const WIDE_ADV: f32 = 1.0;
+
+/// True for characters that need the CJK font and a full-width cell.
+pub fn is_wide(c: char) -> bool {
+    matches!(c as u32, 0x1100..=0x115F | 0x2E80..=0xA4CF | 0xAC00..=0xD7A3 | 0xF900..=0xFAFF | 0xFE30..=0xFE4F | 0xFF00..=0xFF60 | 0xFFE0..=0xFFE6)
+}
+
+fn adv_of(c: Option<char>) -> f32 {
+    match c { Some(c) if is_wide(c) => WIDE_ADV, _ => MONO_ADV }
+}
 pub const LOG_SIZE: f32 = 26.0;
 pub const LOG_LINE: f32 = 46.0;
 pub const LOG_X: f32 = 150.0;
@@ -292,11 +303,12 @@ pub fn visible(si: usize, f: usize) -> usize {
 /// Cell of character `i` of the hero line: x, y (top), w, h.
 pub fn cell(si: usize, i: usize) -> (f32, f32, f32, f32) {
     let s = scene(si);
-    let adv = s.size * MONO_ADV;
+    let chars: Vec<char> = s.text.chars().collect();
+    let before: f32 = (0..i).map(|k| adv_of(chars.get(k).copied())).sum();
     (
-        s.hero.0 + i as f32 * adv,
+        s.hero.0 + before * s.size,
         s.hero.1 - s.size * 0.78,
-        adv,
+        adv_of(chars.get(i).copied()) * s.size,
         s.size * 0.98,
     )
 }