Go47

Discover where you've been in Japan — your photo library mapped to all 47 prefectures, fully on-device.

Go47 turns your photo library into a map of every Japanese prefecture you've visited.

Open the app and it scans the GPS metadata in your photos — entirely on your device, never uploaded — to figure out which of Japan's 47 prefectures you've already set foot in. Watch your map fill in as the scan finds photos from places you'd forgotten.

For travelers, expats, and anyone keeping a quiet record of where they've been.

Features • On-device photo GPS scan — your library never leaves your phone • Map of all 47 prefectures with visit-level shading • Per-prefecture detail showing your photos and visit dates • Multiple scan profiles for different time ranges or photo sources • Share your map as a story or image

Privacy Go47 reads only GPS coordinates and timestamps. It never reads photo contents, never uploads anything, and works entirely offline.