diff --git a/src/backlash_tuner_main.cpp b/src/backlash_tuner_main.cpp
new file mode 100644
index 0000000..b1a7eca
--- /dev/null
+++ b/src/backlash_tuner_main.cpp
@@ -0,0 +1,107 @@
+// Copyright (c) 2023 Ichiro ITS
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#include <iostream>
+#include <memory>
+#include <string>
+#include <sstream>
+
+#include "tachimawari/control/control.hpp"
+#include "tachimawari/node/tachimawari_node.hpp"
+#include "rclcpp/rclcpp.hpp"
+
+int main(int argc, char *argv[])
+{
+  rclcpp::init(argc, argv);
+
+  if (argc < 2) {
+    std::cerr << "Please specify the mode! [sdk / cm740]" << std::endl;
+    return 1;
+  }
+
+  bool read_all = false;
+  std::string target_joint_str;
+  uint8_t target_joint;
+
+  if (argc < 3) {
+    read_all = true;
+  } else {
+    target_joint_str = argv[2];
+    target_joint = std::stoi(target_joint_str);
+  }
+
+  std::string mode = argv[1];
+  std::shared_ptr<tachimawari::control::ControlManager> controller;
+
+  if (mode == "sdk") {
+    controller = std::make_shared<tachimawari::control::DynamixelSDK>("/dev/ttyUSB0");
+  } else if (mode == "cm740") {
+    controller = std::make_shared<tachimawari::control::CM740>("/dev/ttyUSB0");
+  } else {
+    std::cerr << "Mode doesn't exist, select the correct mode! [sdk / cm740]" << std::endl;
+    return 1;
+  }
+
+  if (!controller->connect()) {
+    controller->set_port("/dev/ttyUSB1");
+
+    if (!controller->connect()) {
+      std::cout << "failed to connect controller" << std::endl;
+      return 1;
+    }
+  }
+
+  auto joint_manager = std::make_shared<tachimawari::joint::JointManager>(controller);
+  std::vector<tachimawari::joint::Joint> joints;
+
+  if (!joint_manager->set_joints(joints)) {
+    std::cerr << "failed to sync write" << std::endl;
+  }
+
+  auto node = std::make_shared<rclcpp::Node>("tachimawari_node");
+  tachimawari::TachimawariNode tachimawari_node(node, controller);
+  joints = joint_manager->get_current_joints();
+
+  double max = std::numeric_limits<double>::min();
+  double min = std::numeric_limits<double>::max();
+
+  rclcpp::Rate rcl_rate(8ms);
+  while (rclcpp::ok()) {
+    rcl_rate.sleep();
+    rclcpp::spin_some(node);
+
+    if (!read_all) {
+      for (const auto &joint : joints) {
+        if (target_joint == joint.get_id()) {
+          min = std::min(joint.get_position(), min);
+          max = std::max(joint.get_position(), max);
+
+          std::cout << "id " << static_cast<int>(joint.get_id()) << ": " << joint.get_position() << std::endl;
+          std::cout << "minimum: " << min << std::endl;
+          std::cout << "maximum: " << max << std::endl;
+        }
+      }
+    } else {
+      for (const auto &joint : joints) {
+        std::cout << "id " << static_cast<int>(joint.get_id()) << ": " << joint.get_position() << std::endl;
+      }
+    }
+  }
+}