Turn every castle you visit into a stamp in your pocket collection.

Shiro Neko is a travel companion and digital stamp book (御城印帳) for explorers of Japan's castles — from the famous keeps of Himeji, Matsumoto and Osaka to over 2,200 castles and ruins across all 47 prefectures.

Visit a castle, check in on the spot, and watch your collection grow. Whether you're chasing the 100 Famous Castles of Japan, hunting hidden mountain ruins, or just curious about the history under your feet, Shiro Neko turns castle-hopping into a journey worth keeping.

★ WHAT YOU CAN DO

• Explore 2,200+ castles — browse by region, prefecture, era, or castle type, with photos, history and fun facts for each site.
• GPS check-in (登城) — confirm your visit when you're near a castle and earn your stamp.
• Castle map — a full map of Japan's castles; find what's around you and plan your next trip.
• Nearby castles — see which castles are close to you, right now.
• Your stamp book — a beautiful collection that fills up as you travel.
• Visit journal — attach your own photos and notes to remember each visit.
• Missions & ranks — themed collections, badges and ranks to chase as you explore.
• Famous castle lists — track the 日本100名城 and 続日本100名城.

★ BUILT FOR TRAVELERS

• Works offline — the full castle database is built into the app, so you can explore without a signal in the mountains.
• 9 languages — English, 日本語, 한국어, 中文 (简/繁), ไทย, Français, Español, Italiano.
• No account, no sign-up — open the app and start collecting.

★ 城主 PASS (optional)

Upgrade once to unlock unlimited favorites, custom lists, verified check-ins, photo journaling and data export. The core experience stays free forever.

Whether you're a history buff, a hiker, a stamp collector or just love a good castle view, Shiro Neko makes exploring Japan one castle at a time genuinely rewarding.

Start your collection today.