diff --git a/include/sact.h b/include/sact.h
index be5aed2..9592f2a 100644
--- a/include/sact.h
+++ b/include/sact.h
@@ -104,6 +104,7 @@ int sact_TRANS_Begin(int type);
 int sact_TRANS_Update(float rate);
 int sact_TRANS_End(void);
 
+extern struct text_metrics text_sprite_tm;
 bool StoatSpriteEngine_SP_SetTextSprite(int sp_no, struct string *text);
 void StoatSpriteEngine_SP_SetTextSpriteType(int type);
 void StoatSpriteEngine_SP_SetTextSpriteSize(int size);
diff --git a/src/hll/ChipmunkSpriteEngine.c b/src/hll/ChipmunkSpriteEngine.c
index ac8d7b0..40fae27 100644
--- a/src/hll/ChipmunkSpriteEngine.c
+++ b/src/hll/ChipmunkSpriteEngine.c
@@ -14,6 +14,9 @@
  * along with this program; if not, see <http://gnu.org/licenses/>.
  */
 
+#include "system4/string.h"
+#include "system4/utfsjis.h"
+
 #include "asset_manager.h"
 #include "input.h"
 #include "sact.h"
@@ -52,7 +55,18 @@ HLL_WARN_UNIMPLEMENTED(keep_previous_view, bool, ChipmunkSpriteEngine, KeepPrevi
 //static int ChipmunkSpriteEngine_Sprite_GetTextureFilterType(int sp_no);
 //static bool ChipmunkSpriteEngine_SP_RenderView(int sp_no);
 //static bool ChipmunkSpriteEngine_SP_GetFontDescent(int *descent);
-//static bool ChipmunkSpriteEngine_SP_GetFontWidth(struct string *text, int *width);
+
+static bool ChipmunkSpriteEngine_SP_GetFontWidth(struct string *text, int *width)
+{
+	if (!text || !text->size) {
+		*width = 0;
+		return true;
+	}
+
+	*width = SJIS_2BYTE(text->text[0]) ? text_sprite_tm.size : text_sprite_tm.size / 2;
+	return true;
+}
+
 //static bool ChipmunkSpriteEngine_SP_SetAlphaClipperSpriteNumber(int sp_no, int ac_sp_no);
 //static int ChipmunkSpriteEngine_SP_GetAlphaClipperSpriteNumber(int sp_no);
 //static int CG_GetFormat(int cg_no);
@@ -119,7 +133,7 @@ HLL_LIBRARY(ChipmunkSpriteEngine,
 	    HLL_EXPORT(SP_SetTextSpriteEdgeWeight, StoatSpriteEngine_SP_SetTextSpriteEdgeWeight),
 	    HLL_EXPORT(SP_SetTextSpriteEdgeColor, StoatSpriteEngine_SP_SetTextSpriteEdgeColor),
 	    HLL_TODO_EXPORT(SP_GetFontDescent, ChipmunkSpriteEngine_SP_GetFontDescent),
-	    HLL_TODO_EXPORT(SP_GetFontWidth, ChipmunkSpriteEngine_SP_GetFontWidth),
+	    HLL_EXPORT(SP_GetFontWidth, ChipmunkSpriteEngine_SP_GetFontWidth),
 	    HLL_EXPORT(SP_SetDashTextSprite, StoatSpriteEngine_SP_SetDashTextSprite),
 	    HLL_TODO_EXPORT(SP_SetAlphaClipperSpriteNumber, ChipmunkSpriteEngine_SP_SetAlphaClipperSpriteNumber),
 	    HLL_TODO_EXPORT(SP_GetAlphaClipperSpriteNumber, ChipmunkSpriteEngine_SP_GetAlphaClipperSpriteNumber),
diff --git a/src/hll/StoatSpriteEngine.c b/src/hll/StoatSpriteEngine.c
index 08ad3e2..1adeb6e 100644
--- a/src/hll/StoatSpriteEngine.c
+++ b/src/hll/StoatSpriteEngine.c
@@ -56,7 +56,7 @@ HLL_WARN_UNIMPLEMENTED( , void, StoatSpriteEngine, SetVolumeMixerSEGroupNum, int
 HLL_WARN_UNIMPLEMENTED( , void, StoatSpriteEngine, SetVolumeMixerBGMGroupNum, int n);
 HLL_WARN_UNIMPLEMENTED(0, int,  StoatSpriteEngine, Sound_GetGroupNumFromDataNum, int n);
 
-static struct text_metrics text_sprite_tm = {
+struct text_metrics text_sprite_tm = {
 	.color = { .r = 255, .g = 255, .b = 255, .a = 255 },
 	.outline_color = { .r = 0, .g = 0, .b = 0, .a = 255 },
 	.size = 16,