diff --git a/Core/Compatibility.cpp b/Core/Compatibility.cpp
index 7493edf7d6..5f26b33db5 100644
--- a/Core/Compatibility.cpp
+++ b/Core/Compatibility.cpp
@@ -51,6 +51,7 @@ void Compatibility::CheckSettings(IniFile &iniFile, const std::string &gameID) {
 	CheckSetting(iniFile, gameID, "ClearToRAM", &flags_.ClearToRAM);
 	CheckSetting(iniFile, gameID, "Force04154000Download", &flags_.Force04154000Download);
 	CheckSetting(iniFile, gameID, "DrawSyncEatCycles", &flags_.DrawSyncEatCycles);
+	CheckSetting(iniFile, gameID, "FakeMipmapChange", &flags_.FakeMipmapChange);
 }
 
 void Compatibility::CheckSetting(IniFile &iniFile, const std::string &gameID, const char *option, bool *flag) {
diff --git a/Core/Compatibility.h b/Core/Compatibility.h
index 991b824d73..449c01e3f3 100644
--- a/Core/Compatibility.h
+++ b/Core/Compatibility.h
@@ -51,6 +51,7 @@ struct CompatFlags {
 	bool ClearToRAM;
 	bool Force04154000Download;
 	bool DrawSyncEatCycles;
+	bool FakeMipmapChange;
 };
 
 class IniFile;
diff --git a/GPU/Common/TextureCacheCommon.h b/GPU/Common/TextureCacheCommon.h
index 56ea4f3fb1..bf56a55114 100644
--- a/GPU/Common/TextureCacheCommon.h
+++ b/GPU/Common/TextureCacheCommon.h
@@ -23,6 +23,7 @@
 #include "Common/CommonTypes.h"
 #include "Common/MemoryUtil.h"
 #include "Core/TextureReplacer.h"
+#include "Core/System.h"
 #include "GPU/Common/GPUDebugInterface.h"
 #include "GPU/Common/TextureDecoder.h"
 
@@ -102,6 +103,10 @@ public:
 		return cache.size();
 	}
 
+	bool IsFakeMipmapChange() {
+		return PSP_CoreParameter().compat.flags().FakeMipmapChange && gstate.getTexLevelMode() == GE_TEXLEVEL_MODE_CONST;
+	}
+
 	// Wow this is starting to grow big. Soon need to start looking at resizing it.
 	// Must stay a POD.
 	struct TexCacheEntry {
diff --git a/GPU/Directx9/TextureCacheDX9.cpp b/GPU/Directx9/TextureCacheDX9.cpp
index b7e7a44dd7..c7e7e438ea 100644
--- a/GPU/Directx9/TextureCacheDX9.cpp
+++ b/GPU/Directx9/TextureCacheDX9.cpp
@@ -605,7 +605,7 @@ void TextureCacheDX9::SetTexture(bool force) {
 	}
 
 	u8 level = 0;
-	if (gstate.getTexLevelMode() == GE_TEXLEVEL_MODE_CONST)
+	if (IsFakeMipmapChange())
 		level = (gstate.texlevel >> 20) & 0xF;
 	u32 texaddr = gstate.getTextureAddress(level);
 	if (!Memory::IsValidAddress(texaddr)) {
@@ -1014,7 +1014,7 @@ void TextureCacheDX9::BuildTexture(TexCacheEntry *const entry, bool replaceImage
 		maxLevel = 0;
 	}
 
-	if (gstate.getTexLevelMode() == GE_TEXLEVEL_MODE_CONST) {
+	if (IsFakeMipmapChange()) {
 		u8 level = (gstate.texlevel >> 20) & 0xF;
 		LoadTextureLevel(*entry, replaced, level, maxLevel, replaceImages, scaleFactor, dstFmt);
 	} else
@@ -1102,7 +1102,7 @@ void TextureCacheDX9::LoadTextureLevel(TexCacheEntry &entry, ReplacedTexture &re
 	int h = gstate.getTextureHeight(level);
 
 	LPDIRECT3DTEXTURE9 &texture = DxTex(&entry);
-	if ((level == 0 || gstate.getTexLevelMode() == GE_TEXLEVEL_MODE_CONST) && (!replaceImages || texture == nullptr)) {
+	if ((level == 0 || IsFakeMipmapChange()) && (!replaceImages || texture == nullptr)) {
 		// Create texture
 		D3DPOOL pool = D3DPOOL_MANAGED;
 		int usage = 0;
@@ -1123,7 +1123,7 @@ void TextureCacheDX9::LoadTextureLevel(TexCacheEntry &entry, ReplacedTexture &re
 			}
 		}
 		HRESULT hr;
-		if (gstate.getTexLevelMode() == GE_TEXLEVEL_MODE_CONST)
+		if (IsFakeMipmapChange())
 			hr = pD3Ddevice->CreateTexture(tw, th, 1, usage, tfmt, pool, &texture, NULL);
 		else
 			hr = pD3Ddevice->CreateTexture(tw, th, levels, usage, tfmt, pool, &texture, NULL);
@@ -1135,7 +1135,7 @@ void TextureCacheDX9::LoadTextureLevel(TexCacheEntry &entry, ReplacedTexture &re
 	}
 
 	D3DLOCKED_RECT rect;
-	if (gstate.getTexLevelMode() == GE_TEXLEVEL_MODE_CONST)
+	if (IsFakeMipmapChange())
 		texture->LockRect(0, &rect, NULL, 0);
 	else
 		texture->LockRect(level, &rect, NULL, 0);
@@ -1205,7 +1205,7 @@ void TextureCacheDX9::LoadTextureLevel(TexCacheEntry &entry, ReplacedTexture &re
 		}
 	}
 
-	if (gstate.getTexLevelMode() == GE_TEXLEVEL_MODE_CONST)
+	if (IsFakeMipmapChange())
 		texture->UnlockRect(0);
 	else
 		texture->UnlockRect(level);
diff --git a/GPU/GLES/TextureCacheGLES.cpp b/GPU/GLES/TextureCacheGLES.cpp
index c9a6122dd2..40a634c7f6 100644
--- a/GPU/GLES/TextureCacheGLES.cpp
+++ b/GPU/GLES/TextureCacheGLES.cpp
@@ -687,7 +687,7 @@ void TextureCacheGLES::SetTexture(bool force) {
 	}
 
 	u8 level = 0;
-	if (gstate.getTexLevelMode() == GE_TEXLEVEL_MODE_CONST)
+	if (IsFakeMipmapChange())
 		level = (gstate.texlevel >> 20) & 0xF;
 	u32 texaddr = gstate.getTextureAddress(level);
 	if (!Memory::IsValidAddress(texaddr)) {
@@ -1058,7 +1058,7 @@ void TextureCacheGLES::BuildTexture(TexCacheEntry *const entry, bool replaceImag
 	// be as good quality as the game's own (might even be better in some cases though).
 
 	// Always load base level texture here 
-	if (gstate.getTexLevelMode() == GE_TEXLEVEL_MODE_CONST) {
+	if (IsFakeMipmapChange()) {
 		u8 level = (gstate.texlevel >> 20) & 0xF;
 		LoadTextureLevel(*entry, replaced, level, replaceImages, scaleFactor, dstFmt);
 	} else
@@ -1278,7 +1278,7 @@ void TextureCacheGLES::LoadTextureLevel(TexCacheEntry &entry, ReplacedTexture &r
 		glTexSubImage2D(GL_TEXTURE_2D, level, 0, 0, w, h, components2, dstFmt, pixelData);
 	} else {
 		PROFILE_THIS_SCOPE("loadtex");
-		if (gstate.getTexLevelMode() == GE_TEXLEVEL_MODE_CONST)
+		if (IsFakeMipmapChange())
 			glTexImage2D(GL_TEXTURE_2D, 0, components, w, h, 0, components2, dstFmt, pixelData);
 		else
 			glTexImage2D(GL_TEXTURE_2D, level, components, w, h, 0, components2, dstFmt, pixelData);
diff --git a/GPU/Vulkan/TextureCacheVulkan.cpp b/GPU/Vulkan/TextureCacheVulkan.cpp
index aedad28a57..4eb9d162c0 100644
--- a/GPU/Vulkan/TextureCacheVulkan.cpp
+++ b/GPU/Vulkan/TextureCacheVulkan.cpp
@@ -624,7 +624,7 @@ void TextureCacheVulkan::SetTexture() {
 #endif
 
 	u8 level = 0;
-	if (gstate.getTexLevelMode() == GE_TEXLEVEL_MODE_CONST)
+	if (IsFakeMipmapChange())
 		level = (gstate.texlevel >> 20) & 0xF;
 	u32 texaddr = gstate.getTextureAddress(level);
 	if (!Memory::IsValidAddress(texaddr)) {
@@ -1086,7 +1086,7 @@ void TextureCacheVulkan::BuildTexture(TexCacheEntry *const entry, VulkanPushBuff
 
 	if (entry->vkTex) {
 		u8 level = (gstate.texlevel >> 20) & 0xF;
-		bool fakeMipmap = gstate.getTexLevelMode() == GE_TEXLEVEL_MODE_CONST && level > 0;
+		bool fakeMipmap = IsFakeMipmapChange() && level > 0;
 		// Upload the texture data.
 		for (int i = 0; i <= maxLevel; i++) {
 			int mipWidth = gstate.getTextureWidth(i) * scaleFactor;
diff --git a/assets/compat.ini b/assets/compat.ini
index 7ea055b3d5..00adc21e42 100644
--- a/assets/compat.ini
+++ b/assets/compat.ini
@@ -152,4 +152,13 @@ ULJS00145 = true
 ULKS46183 = true
 ULJS00260 = true
 ULJS19041 = true
-NPJH50843 = true
\ No newline at end of file
+NPJH50843 = true
+
+[FakeMipmapChange]
+# This hacks separates each mipmap to independent textures to display wrong-size mipmaps.
+# For example this requires games like Tactics Ogre(Japanese) to display multi bytes fonts stored in mipmaps.
+# See issue #5350.
+# Tactics Ogre(Japanese)
+ULJM05753 = true
+NPJH50348 = true
+ULJM06009 = true