diff --git a/.vscode/settings.json b/.vscode/settings.json
index c35cb3c..c00d8ed 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -1,5 +1,6 @@
 {
   "cSpell.words": [
+    "COREMARK",
     "cppcheck",
     "mahiwa",
     "pico",
@@ -14,6 +15,14 @@
     "numeric": "cpp",
     "cmath": "cpp",
     "cinttypes": "cpp",
-    "cstdlib": "cpp"
+    "cstdlib": "cpp",
+    "exception": "cpp",
+    "functional": "cpp",
+    "iterator": "cpp",
+    "memory": "cpp",
+    "limits": "cpp",
+    "streambuf": "cpp",
+    "tuple": "cpp",
+    "type_traits": "cpp"
   }
 }
diff --git a/Makefile b/Makefile
index 87613c9..58397c0 100644
--- a/Makefile
+++ b/Makefile
@@ -30,3 +30,15 @@ r-c3:
 
 debug-atom:
 	pio debug -e m5stack-atom
+
+coremark:
+	cp /opt/usuyuki/mahiwa_space/wasm-coremark/coremark-minimal.wasm /opt/usuyuki/.cache/mahiwa/user.wasm
+	wasm2wat /opt/usuyuki/.cache/mahiwa/user.wasm -o /opt/usuyuki/.cache/mahiwa/user.wat
+	(cd /opt/usuyuki/.cache/mahiwa && xxd -i user.wasm > user.h)
+	cp /opt/usuyuki/.cache/mahiwa/user.h /opt/usuyuki/mahiwa_space/mahiwa-backend/src/wasm/user.h
+
+coremarkh:
+	cp /home/usuyuki/mahiwa_space/wasm-coremark/coremark-minimal.wasm /home/usuyuki/.cache/mahiwa/user.wasm
+	wasm2wat /home/usuyuki/.cache/mahiwa/user.wasm -o /home/usuyuki/.cache/mahiwa/user.wat
+	(cd /home/usuyuki/.cache/mahiwa && xxd -i user.wasm > user.h)
+	cp /home/usuyuki/.cache/mahiwa/user.h /home/usuyuki/mahiwa_space/mahiwa-backend/src/wasm/user.h
diff --git a/platformio.ini b/platformio.ini
index b03b0d3..3778a3f 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -80,4 +80,5 @@ lib_deps = wasm3/Wasm3@^0.5.0
 build_flags = 
     ${env.build_flags}
     -DESP32
+    -DUSE_COREMARK
     -DCORE_DEBUG_LEVEL=5
diff --git a/src/lib/roader/wasm-roader.cpp b/src/lib/roader/wasm-roader.cpp
index f7c87a3..97a5900 100644
--- a/src/lib/roader/wasm-roader.cpp
+++ b/src/lib/roader/wasm-roader.cpp
@@ -41,9 +41,22 @@ void wasm_task(void *)
   {
     wasm3_error_printer("mahiwa_LinkSerial", result);
   }
+#ifdef USE_COREMARK
+  Serial.println("call coremark function link");
+  result = mahiwa_LinkCoremark(runtime);
+  if (result)
+  {
+    wasm3_error_printer("mahiwa_LinkCoremark", result);
+  }
+#endif
 
   IM3Function f;
+#ifdef USE_COREMARK
+  Serial.println("coremark mode is enabled!!");
+  result = m3_FindFunction(&f, runtime, "run");
+#else
   result = m3_FindFunction(&f, runtime, "_start");
+#endif
   if (result)
   {
     wasm3_error_printer("m3_FindFunction", result);
@@ -53,9 +66,14 @@ void wasm_task(void *)
 
   // 実行が成功したら終わる
   result = m3_CallV(f);
-
+#ifdef USE_COREMARK
+  float value = 0;
+  result = m3_GetResultsV(f, &value);
+  Serial.print("coremark score:");
+  Serial.println(value, 10);
+#endif
   // 失敗時の処理
-  if (result)
+  if (result != m3Err_none)
   {
     M3ErrorInfo info;
     m3_GetErrorInfo(runtime, &info);
diff --git a/src/lib/roader/wasm-roader.hpp b/src/lib/roader/wasm-roader.hpp
index 7d85d71..db08374 100644
--- a/src/lib/roader/wasm-roader.hpp
+++ b/src/lib/roader/wasm-roader.hpp
@@ -9,6 +9,9 @@
 // 定義読み込み
 #include <lib/wasm-functions/arduino/arduino.hpp>
 #include <lib/wasm-functions/arduino/serial.hpp>
+#ifdef USE_COREMARK
+#include <lib/wasm-functions/mahiwa/coremark/coremark.hpp>
+#endif
 
 // wasm3のexampleの値に従う
 // m3_NewRuntimeの第2引数
diff --git a/src/lib/wasm-functions/mahiwa/coremark/coremark.cpp b/src/lib/wasm-functions/mahiwa/coremark/coremark.cpp
new file mode 100644
index 0000000..afc9b5a
--- /dev/null
+++ b/src/lib/wasm-functions/mahiwa/coremark/coremark.cpp
@@ -0,0 +1,22 @@
+#include <lib/wasm-functions/mahiwa/coremark/coremark.hpp>
+
+// coremark-minimalに必要な関数を用意する
+//   (import "env" "clock_ms" (func (;0;) (type 8)))
+//   (type (;8;) (func (result i64)))
+m3ApiRawFunction(m3_clock_ms)
+{
+    // cppcheck-suppress cstyleCast
+    m3ApiReturnType(int64_t);
+    m3ApiReturn(millis());
+    m3ApiSuccess();
+}
+
+M3Result mahiwa_LinkCoremark(IM3Runtime runtime)
+{
+    Serial.println("link coremark function");
+    IM3Module module = runtime->modules;
+
+    m3_LinkRawFunction(module, "env", "clock_ms", "I()", &m3_clock_ms);
+
+    return m3Err_none;
+}
diff --git a/src/lib/wasm-functions/mahiwa/coremark/coremark.hpp b/src/lib/wasm-functions/mahiwa/coremark/coremark.hpp
new file mode 100644
index 0000000..7469a69
--- /dev/null
+++ b/src/lib/wasm-functions/mahiwa/coremark/coremark.hpp
@@ -0,0 +1,6 @@
+#pragma once
+
+#include <m3_env.h>
+#include <Arduino.h>
+
+M3Result mahiwa_LinkCoremark(IM3Runtime runtime);
diff --git a/src/main.cpp b/src/main.cpp
index 4c661c3..39a2039 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -11,12 +11,11 @@ void setup()
   Serial.println(cos(0));
 
   Serial.println("Project Mahiwa started🎉");
-  Serial.print("cos(0.0)");
-  Serial.println(cos(0.0));
-  Serial.print("max(100,200)");
-  Serial.println(max(100, 200));
 #ifdef ESP32
   Serial.println("ESP32 Mode");
+  Serial.print("CPU Frequency:");
+  Serial.print(ESP.getCpuFreqMHz());
+  Serial.println(" MHz");
   // xTaskCreatePinnedToCoreはFreeRTOSの関数
   // ESP32ではデフォルトでFreeRTOSが組み込まれているため下記のような形となる．
   // wasm3-arduinoのexampleでは16kbごとに区切るためと書かれている．