--- a/gfx/thebes/gfxAndroidPlatform.cpp
+++ b/gfx/thebes/gfxAndroidPlatform.cpp
@@ -168,16 +168,17 @@ IsJapaneseLocale()
 
 void
 gfxAndroidPlatform::GetCommonFallbackFonts(uint32_t aCh, uint32_t aNextCh,
                                            Script aRunScript,
                                            nsTArray<const char*>& aFontList)
 {
     static const char kDroidSansJapanese[] = "Droid Sans Japanese";
     static const char kMotoyaLMaru[] = "MotoyaLMaru";
+    static const char kNotoSansCJKJP[] = "Noto Sans CJK JP";
     static const char kNotoColorEmoji[] = "Noto Color Emoji";
 #ifdef MOZ_WIDGET_GONK
     static const char kFirefoxEmoji[] = "Firefox Emoji";
 #endif
 
     if (aNextCh == 0xfe0fu) {
         // if char is followed by VS16, try for a color emoji glyph
 #ifdef MOZ_WIDGET_GONK
@@ -224,22 +225,24 @@ gfxAndroidPlatform::GetCommonFallbackFon
             aFontList.AppendElement("Droid Sans Georgian");
             break;
         case 0x12: case 0x13:
             aFontList.AppendElement("Droid Sans Ethiopic");
             break;
         case 0xf9: case 0xfa:
             if (IsJapaneseLocale()) {
                 aFontList.AppendElement(kMotoyaLMaru);
+                aFontList.AppendElement(kNotoSansCJKJP);
                 aFontList.AppendElement(kDroidSansJapanese);
             }
             break;
         default:
             if (block >= 0x2e && block <= 0x9f && IsJapaneseLocale()) {
                 aFontList.AppendElement(kMotoyaLMaru);
+                aFontList.AppendElement(kNotoSansCJKJP);
                 aFontList.AppendElement(kDroidSansJapanese);
             }
             break;
         }
     }
     // and try Droid Sans Fallback as a last resort
     aFontList.AppendElement("Droid Sans Fallback");
 }

--- a/modules/libpref/init/all.js
+++ b/modules/libpref/init/all.js
@@ -4215,24 +4215,25 @@ pref("font.name.sans-serif.he", "Clear S
 pref("font.name.monospace.he", "Droid Sans Mono");
 pref("font.name-list.serif.he", "Noto Serif");
 pref("font.name-list.sans-serif.he", "Droid Sans Hebrew, Clear Sans, Droid Sans");
 
 pref("font.name.serif.ja", "Charis SIL Compact");
 pref("font.name.sans-serif.ja", "Clear Sans");
 pref("font.name.monospace.ja", "MotoyaLMaru");
 pref("font.name-list.serif.ja", "Noto Serif, Droid Serif");
-pref("font.name-list.sans-serif.ja", "Clear Sans, Roboto, Droid Sans, MotoyaLMaru, MotoyaLCedar, Noto Sans JP, Droid Sans Japanese");
-pref("font.name-list.monospace.ja", "MotoyaLMaru, MotoyaLCedar, Droid Sans Mono");
+pref("font.name-list.sans-serif.ja", "Clear Sans, Roboto, Droid Sans, MotoyaLMaru, MotoyaLCedar, Noto Sans JP, Noto Sans CJK JP, Droid Sans Japanese");
+pref("font.name-list.monospace.ja", "MotoyaLMaru, MotoyaLCedar, Droid Sans Mono CJK JP, Droid Sans Mono");
 
 pref("font.name.serif.ko", "Charis SIL Compact");
 pref("font.name.sans-serif.ko", "Clear Sans");
 pref("font.name.monospace.ko", "Droid Sans Mono");
 pref("font.name-list.serif.ko", "Noto Serif, Droid Serif, HYSerif");
-pref("font.name-list.sans-serif.ko", "SmartGothic, NanumGothic, Noto Sans KR, DroidSansFallback, Droid Sans Fallback");
+pref("font.name-list.sans-serif.ko", "SmartGothic, NanumGothic, Noto Sans KR, Noto Sans CJK KR, DroidSansFallback, Droid Sans Fallback");
+pref("font.name-list.monospace.ko", "Noto Sans Mono CJK KR");
 
 pref("font.name.serif.th", "Charis SIL Compact");
 pref("font.name.sans-serif.th", "Clear Sans");
 pref("font.name.monospace.th", "Droid Sans Mono");
 pref("font.name-list.serif.th", "Noto Serif, Droid Serif");
 pref("font.name-list.sans-serif.th", "Droid Sans Thai, Clear Sans, Droid Sans");
 
 pref("font.name.serif.x-cyrillic", "Charis SIL Compact");
@@ -4252,32 +4253,32 @@ pref("font.name.sans-serif.x-western", "
 pref("font.name.monospace.x-western", "Droid Sans Mono");
 pref("font.name-list.serif.x-western", "Noto Serif, Droid Serif");
 pref("font.name-list.sans-serif.x-western", "Clear Sans, Roboto, Droid Sans");
 
 pref("font.name.serif.zh-CN", "Charis SIL Compact");
 pref("font.name.sans-serif.zh-CN", "Clear Sans");
 pref("font.name.monospace.zh-CN", "Droid Sans Mono");
 pref("font.name-list.serif.zh-CN", "Noto Serif, Droid Serif, Droid Sans Fallback");
-pref("font.name-list.sans-serif.zh-CN", "Roboto, Droid Sans, Noto Sans SC, Droid Sans Fallback");
-pref("font.name-list.monospace.zh-CN", "Droid Sans Fallback");
+pref("font.name-list.sans-serif.zh-CN", "Roboto, Droid Sans, Noto Sans SC, Noto Sans CJK SC, Droid Sans Fallback");
+pref("font.name-list.monospace.zh-CN", "Noto Sans Mono CJK SC, Droid Sans Fallback");
 
 pref("font.name.serif.zh-HK", "Charis SIL Compact");
 pref("font.name.sans-serif.zh-HK", "Clear Sans");
 pref("font.name.monospace.zh-HK", "Droid Sans Mono");
 pref("font.name-list.serif.zh-HK", "Noto Serif, Droid Serif, Droid Sans Fallback");
-pref("font.name-list.sans-serif.zh-HK", "Roboto, Droid Sans, Noto Sans TC, Noto Sans SC, Droid Sans Fallback");
-pref("font.name-list.monospace.zh-HK", "Droid Sans Fallback");
+pref("font.name-list.sans-serif.zh-HK", "Roboto, Droid Sans, Noto Sans TC, Noto Sans SC, Noto Sans CJK TC, Droid Sans Fallback");
+pref("font.name-list.monospace.zh-HK", "Noto Sans Mono CJK TC, Droid Sans Fallback");
 
 pref("font.name.serif.zh-TW", "Charis SIL Compact");
 pref("font.name.sans-serif.zh-TW", "Clear Sans");
 pref("font.name.monospace.zh-TW", "Droid Sans Mono");
 pref("font.name-list.serif.zh-TW", "Noto Serif, Droid Serif, Droid Sans Fallback");
-pref("font.name-list.sans-serif.zh-TW", "Roboto, Droid Sans, Noto Sans TC, Noto Sans SC, Droid Sans Fallback");
-pref("font.name-list.monospace.zh-TW", "Droid Sans Fallback");
+pref("font.name-list.sans-serif.zh-TW", "Roboto, Droid Sans, Noto Sans TC, Noto Sans SC, Noto Sans CJK TC, Droid Sans Fallback");
+pref("font.name-list.monospace.zh-TW", "Noto Sans Mono CJK TC, Droid Sans Fallback");
 
 pref("font.name.serif.x-math", "Latin Modern Math");
 pref("font.name-list.serif.x-math", "Latin Modern Math, XITS Math, Cambria Math, Libertinus Math, DejaVu Math TeX Gyre, TeX Gyre Bonum Math, TeX Gyre Pagella Math, TeX Gyre Schola, TeX Gyre Termes Math, STIX Math, Asana Math, STIXGeneral, DejaVu Serif, DejaVu Sans, Charis SIL Compact");
 pref("font.name.sans-serif.x-math", "Clear Sans");
 pref("font.name.monospace.x-math", "Droid Sans Mono");
 
 #endif