Hi there! I understand you're having trouble finding the update button for Usagi Shima on your Android device, is that right? Just to make sure I help you best—are you trying to update the game through the Google Play Store? Also, can you tell me if the app opens fine, or if it keeps prompting you to update?

Usually, when the update button doesn’t show up, it might be due to some cached data in the Play Store app. Here's a simple step-by-step to try:

1. Open your device’s Settings.
2. Go to Apps & notifications (or just Apps).
3. Find and tap on Google Play Store.
4. Tap Storage & cache.
5. Tap Clear cache (do NOT tap clear data yet unless necessary).
6. Go back and open the Google Play Store app again.
7. Search for Usagi Shima and see if the update button appears.

If this doesn’t fix the problem, it might help to restart your device and check again. Sometimes, the Play Store needs a refresh to recognize updates.

Let me know if you’ve tried clearing the cache or if you want me to guide you through that. Also, is your device connected to a stable internet connection? That sometimes affects update availability.

Looking forward to your reply so we can get your game updated smoothly!