diff --git a/data/mods/Monster_Girls/categories.json b/data/mods/Monster_Girls/categories.json
index 1faf7c2fbba1..4b728db75854 100644
--- a/data/mods/Monster_Girls/categories.json
+++ b/data/mods/Monster_Girls/categories.json
@@ -91,5 +91,14 @@
     "mutagen_message": "You feel the woods calling to you.",
     "iv_message": "You feel like you could live forever, just like the trees!",
     "memorial_message": "Spoke with the trees."
+  },
+  {
+    "type": "mutation_category",
+    "id": "KITSUNE",
+    "name": "Kitsune",
+    "threshold_mut": "THRESH_KITSUNE",
+    "mutagen_message": "You suddenly have an indescribable craving for chicken...",
+    "iv_message": "Your blood runs wild with mischief and merriment as the mutagen flows through it.",
+    "memorial_message": "Learned what the fox says."
   }
 ]
diff --git a/data/mods/Monster_Girls/dreams.json b/data/mods/Monster_Girls/dreams.json
index 0ab299feb3e0..86cd727cffe0 100644
--- a/data/mods/Monster_Girls/dreams.json
+++ b/data/mods/Monster_Girls/dreams.json
@@ -59,6 +59,12 @@
     "category": "MOUSEGIRL",
     "strength": 1
   },
+  {
+    "type": "dream",
+    "messages": [ "You have a strange dream about foxes.", "Your dreams give you a mischievous furry feeling." ],
+    "category": "KITSUNE",
+    "strength": 1
+  },
   {
     "type": "dream",
     "messages": [
@@ -137,6 +143,16 @@
     "category": "MOUSEGIRL",
     "strength": 2
   },
+  {
+    "type": "dream",
+    "messages": [
+      "You have a vivid dream of hunting in the woods.",
+      "You have a vivid dream of sneaking up to a chicken coop.",
+      "Whilst dreaming, you see yourself… but with a pair of fox ears on your head?"
+    ],
+    "category": "KITSUNE",
+    "strength": 2
+  },
   {
     "type": "dream",
     "messages": [
@@ -221,6 +237,15 @@
     "category": "MOUSEGIRL",
     "strength": 3
   },
+  {
+    "type": "dream",
+    "messages": [
+      "You vividly dream of running away from a chicken coop, your prey held by the neck between your teeth.",
+      "You vividly dream of… a wedding altar?!?"
+    ],
+    "category": "KITSUNE",
+    "strength": 3
+  },
   {
     "type": "dream",
     "messages": [
@@ -317,5 +342,15 @@
     ],
     "category": "MOUSEGIRL",
     "strength": 4
+  },
+  {
+    "type": "dream",
+    "messages": [
+      "You vividly dream of committing tax fraud: the ultimate trick!",
+      "You find yourself subconsciously moving your head from your normal pillow to your tail as you sleep.",
+      "You dream of sharing your love of mischief with a partner."
+    ],
+    "category": "KITSUNE",
+    "strength": 4
   }
 ]
diff --git a/data/mods/Monster_Girls/migration.json b/data/mods/Monster_Girls/migration.json
index e3decebf3947..f57ad2483dfe 100644
--- a/data/mods/Monster_Girls/migration.json
+++ b/data/mods/Monster_Girls/migration.json
@@ -192,12 +192,12 @@
   {
     "id": "mutagen_beast",
     "type": "MIGRATION",
-    "replace": "mutagen"
+    "replace": "mutagen_kitsune"
   },
   {
     "id": "iv_mutagen_beast",
     "type": "MIGRATION",
-    "replace": "iv_mutagen"
+    "replace": "iv_mutagen_kitsune"
   },
   {
     "id": "mutagen_fish",
diff --git a/data/mods/Monster_Girls/mutagens.json b/data/mods/Monster_Girls/mutagens.json
index c458f220765d..819a3241a993 100644
--- a/data/mods/Monster_Girls/mutagens.json
+++ b/data/mods/Monster_Girls/mutagens.json
@@ -138,5 +138,20 @@
     "copy-from": "iv_mutagen_elfa",
     "name": "Fey serum",
     "use_action": { "type": "mutagen_iv", "mutation_category": "ELF" }
+  },
+  {
+    "id": "mutagen_kitsune",
+    "type": "COMESTIBLE",
+    "copy-from": "mutagen_beast",
+    "name": "Kitsune mutagen",
+    "use_action": { "type": "mutagen", "mutation_category": "KITSUNE" }
+  },
+  {
+    "id": "iv_mutagen_kitsune",
+    "type": "COMESTIBLE",
+    "copy-from": "iv_mutagen_beast",
+    "name": "Kitsune serum",
+    "description": "A super-concentrated mutagen the color of amber.  You need a syringe to inject it… if you really want to?",
+    "use_action": { "type": "mutagen_iv", "mutation_category": "KITSUNE" }
   }
 ]
diff --git a/data/mods/Monster_Girls/recipes.json b/data/mods/Monster_Girls/recipes.json
index 86eff1bb75cc..59ca60145e0f 100644
--- a/data/mods/Monster_Girls/recipes.json
+++ b/data/mods/Monster_Girls/recipes.json
@@ -122,5 +122,17 @@
     "result": "mutagen_elf",
     "copy-from": "mutagen_elfa",
     "components": [ [ [ "mutagen_slime", 2 ], [ "iv_mutagen_slime", 1 ] ], [ [ "mutagen_plant", 1 ] ], [ [ "mutagen_bird", 1 ] ] ]
+  },
+  {
+    "type": "recipe",
+    "result": "iv_mutagen_kitsune",
+    "copy-from": "iv_mutagen_beast",
+    "components": [ [ [ "mutagen_kitsune", 2 ] ] ]
+  },
+  {
+    "type": "recipe",
+    "result": "mutagen_kitsune",
+    "copy-from": "mutagen_beast",
+    "components": [ [ [ "mutagen", 1 ] ], [ [ "animal_blood_concentrate", 9 ] ], [ [ "ammonia", 1 ], [ "lye_powder", 100 ] ] ]
   }
 ]
diff --git a/data/mods/Monster_Girls/thresh_mutation.json b/data/mods/Monster_Girls/thresh_mutation.json
index 0b6b16cd6303..4247ba01822a 100644
--- a/data/mods/Monster_Girls/thresh_mutation.json
+++ b/data/mods/Monster_Girls/thresh_mutation.json
@@ -108,5 +108,16 @@
     "purifiable": false,
     "threshold": true,
     "mutagen_target_modifier": 10
+  },
+  {
+    "type": "mutation",
+    "id": "THRESH_KITSUNE",
+    "name": { "str": "Kitsune" },
+    "points": 1,
+    "description": "While you may not have gained the magical powers of the japanese fox spirits, you embody their mischievous nature perfectly.  Perhaps one day, you'll find that special partner-in-crime to live up to the other reputation Kitsunes have.",
+    "valid": false,
+    "purifiable": false,
+    "threshold": true,
+    "mutagen_target_modifier": 10
   }
 ]
diff --git a/data/mods/Monster_Girls/vanilla_mutations.json b/data/mods/Monster_Girls/vanilla_mutations.json
index 6d46e9307176..57d5f75452e3 100644
--- a/data/mods/Monster_Girls/vanilla_mutations.json
+++ b/data/mods/Monster_Girls/vanilla_mutations.json
@@ -144,7 +144,7 @@
     "id": "DEFT",
     "copy-from": "DEFT",
     "delete": { "category": [ "BIRD", "BEAST", "RAPTOR", "MOUSE", "FELINE" ] },
-    "extend": { "category": [ "NEKO", "MOUSEGIRL", "HARPY" ] }
+    "extend": { "category": [ "NEKO", "MOUSEGIRL", "HARPY", "KITSUNE" ] }
   },
   {
     "type": "mutation",
@@ -179,7 +179,7 @@
     "id": "ADRENALINE",
     "copy-from": "ADRENALINE",
     "delete": { "category": [ "BEAST", "CHIMERA" ] },
-    "valid": false
+    "extend": { "category": [ "KITSUNE" ] }
   },
   {
     "type": "mutation",
@@ -228,7 +228,7 @@
     "id": "PRETTY",
     "copy-from": "PRETTY",
     "delete": { "category": [ "ALPHA", "FELINE", "LUPINE" ] },
-    "extend": { "category": [ "NEKO", "DOGGIRL" ] }
+    "extend": { "category": [ "NEKO", "DOGGIRL", "KITSUNE" ] }
   },
   {
     "type": "mutation",
@@ -249,7 +249,7 @@
     "id": "SLEEPY",
     "copy-from": "SLEEPY",
     "delete": { "category": [ "BEAST", "CHIMERA", "MOUSE" ] },
-    "extend": { "category": [ "MOUSEGIRL" ] }
+    "extend": { "category": [ "MOUSEGIRL", "KITSUNE" ] }
   },
   {
     "type": "mutation",
@@ -340,7 +340,7 @@
     "id": "ANIMALDISCORD",
     "copy-from": "ANIMALDISCORD",
     "delete": { "category": [ "LUPINE", "BEAST", "RAPTOR", "INSECT" ] },
-    "extend": { "category": [ "DOGGIRL" ] }
+    "extend": { "category": [ "DOGGIRL", "KITSUNE" ] }
   },
   {
     "type": "mutation",
@@ -417,7 +417,7 @@
     "id": "NIGHTVISION2",
     "copy-from": "NIGHTVISION2",
     "delete": { "category": [ "FISH", "BEAST", "INSECT", "RAT", "CHIMERA", "LUPINE", "MOUSE", "FELINE", "URSINE" ] },
-    "extend": { "category": [ "NEKO", "DOGGIRL", "MOUSEGIRL", "BEARGIRL" ] }
+    "extend": { "category": [ "NEKO", "DOGGIRL", "MOUSEGIRL", "BEARGIRL", "KITSUNE" ] }
   },
   {
     "type": "mutation",
@@ -445,7 +445,7 @@
     "id": "FEL_EYE",
     "copy-from": "FEL_EYE",
     "delete": { "category": [ "FELINE", "BEAST" ] },
-    "extend": { "category": [ "NEKO" ] }
+    "extend": { "category": [ "NEKO", "KITSUNE" ] }
   },
   {
     "type": "mutation",
@@ -1187,7 +1187,7 @@
     "id": "TAIL_FLUFFY",
     "copy-from": "TAIL_FLUFFY",
     "delete": { "category": [ "BEAST", "LUPINE" ] },
-    "extend": { "category": [ "DOGGIRL" ] }
+    "extend": { "category": [ "DOGGIRL", "KITSUNE" ] }
   },
   {
     "type": "mutation",
@@ -1334,7 +1334,7 @@
     "id": "LUPINE_EARS",
     "copy-from": "LUPINE_EARS",
     "delete": { "category": [ "LUPINE" ] },
-    "valid": false
+    "extend": { "category": [ "KITSUNE" ] }
   },
   {
     "type": "mutation",
@@ -1810,7 +1810,7 @@
     "id": "HUNGER",
     "copy-from": "HUNGER",
     "delete": { "category": [ "RAT", "ALPHA", "MEDICAL", "ELFA", "BEAST", "SLIME", "RAPTOR", "CHIMERA", "MOUSE" ] },
-    "extend": { "category": [ "MOUSEGIRL", "SLIMEGIRL", "ELF" ] }
+    "extend": { "category": [ "MOUSEGIRL", "SLIMEGIRL", "ELF", "KITSUNE" ] }
   },
   {
     "type": "mutation",
@@ -1824,7 +1824,7 @@
     "id": "HUNGER2",
     "copy-from": "HUNGER2",
     "delete": { "category": [ "BEAST", "SLIME", "RAPTOR" ] },
-    "extend": { "category": [ "SLIMEGIRL" ] }
+    "extend": { "category": [ "SLIMEGIRL", "KITSUNE" ] }
   },
   {
     "type": "mutation",
@@ -2349,6 +2349,6 @@
     "id": "FELINE_FLEXIBILITY",
     "copy-from": "FELINE_FLEXIBILITY",
     "delete": { "category": [ "FELINE" ] },
-    "extend": { "category": [ "NEKO" ], "threshreq": [ "THRESH_NEKO" ] }
+    "extend": { "category": [ "NEKO", "KITSUNE" ], "threshreq": [ "THRESH_NEKO", "THRESH_KITSUNE" ] }
   }
 ]