diff --git a/requirements.txt b/requirements.txt
index 5bcbb597..23f4abf6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -20,6 +20,7 @@ huggingface_hub==0.32.2
 hf-xet==1.1.2
 setuptools==80.8.0
 langchain-openai==0.3.32
+langchain-google-genai==2.1.10
 translators @ git+https://github.com/misyaguziya/translators@5.9.2.1
 SpeechRecognition @ git+https://github.com/misyaguziya/custom_speech_recognition@3.10.4.1
 tinyoscquery @ git+https://github.com/cyberkitsune/tinyoscquery@0.1.3
\ No newline at end of file
diff --git a/requirements_cuda.txt b/requirements_cuda.txt
index a2b1ad0e..6ea366d4 100644
--- a/requirements_cuda.txt
+++ b/requirements_cuda.txt
@@ -21,6 +21,7 @@ huggingface_hub==0.32.2
 hf-xet==1.1.2
 setuptools==80.8.0
 langchain-openai==0.3.32
+langchain-google-genai==2.1.10
 translators @ git+https://github.com/misyaguziya/translators@5.9.2.1
 SpeechRecognition @ git+https://github.com/misyaguziya/custom_speech_recognition@3.10.4.1
 tinyoscquery @ git+https://github.com/cyberkitsune/tinyoscquery@0.1.3
\ No newline at end of file
diff --git a/src-python/models/translation/translation_gemini.py b/src-python/models/translation/translation_gemini.py
new file mode 100644
index 00000000..51f43933
--- /dev/null
+++ b/src-python/models/translation/translation_gemini.py
@@ -0,0 +1,150 @@
+from langchain_google_genai import ChatGoogleGenerativeAI
+from langchain_core.messages import HumanMessage
+
+_MODELS = [
+    "gemini-2.5-pro",
+    "gemini-2.5-flash",
+    "gemini-2.5-flash-lite",
+    "gemini-2.0-flash",
+    "gemini-2.0-flash-lite",
+    "gemini-1.5-pro",
+    "gemini-1.5-flash-8b"
+    "gemini-1.5-flash",
+    ]
+
+class GeminiClient:
+    def __init__(self, api_key: str = "", model: str = "gemini-2.5-flash"):
+        self.api_key = api_key
+        self.model = model
+        self.prompt_template = """
+        Please translate the following text from {input_lang} to {output_lang}.
+        Only provide the translated text as the output.
+        {text}
+        """
+        self.gemini_llm = ChatGoogleGenerativeAI(
+            model=self.model,
+            api_key=self.api_key,
+        )
+
+    def getListModels(self) -> list[str]:
+        return _MODELS
+
+    def getAuthKey(self) -> str:
+        """現在のAuthKeyを取得する"""
+        return self.api_key
+
+    def getModel(self) -> str:
+        """現在のモデルを取得する"""
+        return self.model
+
+    def setAuthKey(self, api_key: str) -> bool:
+        """AuthKeyを設定し、成功したかどうかを返す"""
+        try:
+            self.api_key = api_key
+            self.gemini_llm = ChatGoogleGenerativeAI(
+                model=self.model,
+                api_key=self.api_key,
+            )
+            return True
+        except Exception as e:
+            print(f"Error setting AuthKey: {e}")
+            return False
+
+    def setModel(self, model: str) -> bool:
+        """モデルを設定し、成功したかどうかを返す"""
+        try:
+            if model in _MODELS:
+                self.model = model
+                self.gemini_llm = ChatGoogleGenerativeAI(
+                    model=self.model,
+                    api_key=self.api_key,
+                )
+                return True
+            else:
+                print(f"Model {model} is not supported.")
+                return False
+        except Exception as e:
+            print(f"Error setting model: {e}")
+            return False
+
+    def translate(self, text: str, input_lang: str, output_lang: str) -> str:
+        messages = self.prompt_template.format(
+                    input_lang=input_lang,
+                    output_lang=output_lang,
+                    text=text
+                )
+
+        output = self.gemini_llm.invoke([HumanMessage(content=messages)])
+        return output.content
+
+    def checkAuthKey(self) -> bool:
+        try:
+            self.setModel(self.model)
+            self.translate("Hello World", input_lang="English", output_lang="Japanese")
+            return True
+        except Exception:
+            return False
+
+if __name__ == "__main__":
+    AUTH_KEY = "AUTH_KEY"
+    text = """
+        毎朝コーヒーを入れるのがささやかな楽しみになってる
+        """
+    input_lang = "Japanese"
+    output_lang = "English"
+
+    gemini_client = GeminiClient(api_key=AUTH_KEY, model="gemini-1.5-flash")
+
+    print("model list:", gemini_client.getListModels())
+    print("AuthKey:", gemini_client.getAuthKey())
+    # print("Model:", gemini_client.getModel())
+    # print(f"set model: {gemini_client.setModel('gemini-2.5-flash')}")
+    # print(f"set AuthKey: {gemini_client.setAuthKey(AUTH_KEY)}")
+    # print(f"check AuthKey: {gemini_client.checkAuthKey()}")
+
+    # try:
+    #     translated_text = gemini_client.translate(text, input_lang, output_lang)
+    #     print(translated_text)
+    # except Exception:
+    #     print("Invalid API key. Please check your credentials.")
+
+
+    supported_languages = """
+    English
+    Japanese
+    Korean
+    French
+    German
+    Spanish
+    Portuguese
+    Russian
+    Italian
+    Dutch
+    Polish
+    Turkish
+    Arabic
+    Hindi
+    Thai
+    Vietnamese
+    Indonesian
+    Malay
+    Filipino
+    Swedish
+    Finnish
+    Danish
+    Norwegian
+    Romanian
+    Czech
+    Hungarian
+    Greek
+    Hebrew
+    Simplified Chinese
+    Traditional Chinese
+    """
+
+    for lang in supported_languages.split("\n"):
+        if lang == "":
+            continue
+        print (f"Translating to {lang}:")
+        translated_text = gemini_client.translate(text, input_lang, lang)
+        print(f"Translated text: {translated_text}")