import requests
import json

def translate_text(text, target_lang='ja', source_lang='en'):
    api_key = "AIzaSyAEzK5_n6zKTimD9yoXS-C8O0xN_4LaVBQ"
    url = f"https://translation.googleapis.com/language/translate/v2?key={api_key}"
    payload = {
        'q': text,
        'source': source_lang,
        'target': target_lang,
        'format': 'text'
    }
    headers = {
        'Content-Type': 'application/json'
    }

    response = requests.post(url, headers=headers, json=payload)
    if response.status_code == 200:
        return json.loads(response.text)['data']['translations'][0]['translatedText']
    else:
        return "Error: " + response.text