It was created in 2005 by the merger of the former Nakamura City and Nishitosa Village, and the name of the city is derived from the Shimanto River that streams through the city.
Forests cover about 91% of the city area.
As of June 2025, the population is about 30,000, making it the third most populous prefecture in Kochi Prefecture.
The Shimanto River has a total length of 196 km, has no Dam, and is known as "the last Clear streams in Japan", and the city's catch phrase is "A city that lives with the river".
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🌸Shinyan and Nyanko’s Layered Stamp Rally Tour
🌸
Extended due to popular demand!!
Event period
Friday, August 1, 2025 – Friday, October 31, 2025
Extended period
Friday, August 1, 2025 – Wednesday, December 31, 2025
Join Shimanto City Tourism Association’s official characters, Shinyan and Nyanko, for a stamp rally that lets you enjoy Shimanto City!
This isn’t just any stamp — these are layered stamps.
As you stack each stamp, by the end…ta‑da! A single piece of art appears✨
Turn your completed sheet into a postcard!
It’s perfect as a travel keepsake or a gift for friends💌
Why not create your own Shimanto art?
How to enjoy — it’s super easy♪
1. Get a stamp sheet!
→ Sheets are distributed in limited numbers at each facility. If one place runs out, another might still have them!
2. Stack and stamp five stamps!
→ Stamps 1–5 share the same design in either area. The final image is the same even if you don’t stamp in order!
3. Once all stamps are in place, a cute Shinyan art piece is complete🎨
→ You can take it home as a postcard✨
4. Show your completed sheet and…
→ The first 500 visitors receive an original cotton tote bag as a gift🎁
Two areas — start anywhere you like
Stamp spots form one design across the Nakamura Area and the Nishitosa Area. Because stamps 1–5 are common, collecting them in either area yields the same final image♪
Nakamura Area🐾
1. Shimanto River Museum Akitsuio — Admission required
A facility where you can learn about the creatures of the Shimanto River. With dragonfly and insect specimens and displays of fish from the Shimanto River basin, it’s fun for adults and children alike!
Hours: 9:00–17:00 (Closed Mondays)
2. Shimanto River Sightseeing Boats (Yakatabune) — Boarding required
Three sightseeing boat operators participate; whichever operator you board will stamp your sheet. Enjoy a relaxing cruise on the beautiful Shimanto River♪
Hours: 9:00–16:00 (Advance reservation recommended)
3. Shimanto City Local Museum — Admission required
A castle-shaped museum on a small hill. Learn Shimanto City’s history and culture, and take in city views from the tower for a castle‑lord feeling!
Hours: 9:00–17:00 (Closed Wednesdays)
4. harenoba cafe n2 (Cafe N2) — Purchase or dine required
Located around the middle of Tenjinbashi Shopping Street, it’s the perfect stop to rest during sightseeing.
Hours: 11:00–18:00 (Closed Mondays)
5. Shimanto City Tourism Association — Cotton bag pick‑up location — Visit required
A hub for travel information on Shimanto City and the Hata Region. They offer rental bikes (¥1,000 and up) and discounted sightseeing boat tickets!
Hours: 8:30–17:30 (Open year‑round)
The Nakamura town center is easy to explore by rental bike, so you can take a leisurely stroll and collect stamps!
Nishitosa Area🐾
1. Roadside Station Yotte Nishitosa — Visit required
A popular spot with local specialties and souvenirs. Enjoy grilled natural ayu (sweetfish) from the Shimanto River and sweets made from local ingredients — ideal for a break or shopping!
Hours: 7:30–18:00 (No holidays during the event period)
2. Shimanto River Station Canoe Hall — Purchase, experience, or stay required
A facility offering canoe experiences, SUP, and rafting, with an adjacent campsite so you can fully enjoy the outdoors!
Hours: 8:30–17:30 (No holidays during the event period)
3. Iwami Chaya (near the sinking bridge!) — Visit required
Right next to Iwami Sinking Bridge, this spot sells homemade bento and unique handmade goods made by locals. Fans should also check out the “Shimanto River” monument by Hiroshi Miyama with parking available!
Hours: 10:00–15:00 (Closed Mondays)
4. Hotel Seira Shimanto — Stay or day‑use hot spring required
In addition to lodging, the hotel has a restaurant and day‑use hot spring, perfect for soothing travel fatigue. At night, the stargazing guide by the star attendant is highly recommended!
Hours: 9:00–17:00 (Open year‑round)
5. Shimanto River Furusato Guide Center — Cotton bag pick‑up location — Visit required
The Nishitosa tourist information desk located right by the station. You can also rent Rinrin Cycles here!
Hours: 8:30–18:00 (Closed Wednesdays)
Driving is recommended in Nishitosa! Enjoy a scenic drive along the Shimanto River while taking in nature♪
Note: Opening days and hours may vary. Please check each facility’s website for the latest information. (Information current as of July 2025)
Key point!
Stamps 1–5 share a common design, so collecting them across Nakamura and Nishitosa will still complete the same image!
(For example: either Nakamura’s Shimanto River Museum Akitsuio or Nishitosa’s Roadside Station Yotte Nishitosa for stamp 1 is fine)
When you collect all the stamps…
🎉 The first 500 participants will receive
\an original cotton tote bag/
Show your completed stamp sheet at one of the following locations👇
• Nakamura: Shimanto City Tourism Association
• Nishitosa: Shimanto River Furusato Guide Center
This cute, exclusive bag features Shinyan artwork and is only available here🐾✨
Who are Shinyan and Nyanko?
Shinyan and Nyanko are local cat characters of the Shimanto City Tourism Association.
There are five cats in total, each inspired by the Shimanto River’s nature, traditional fishing methods, and local culture.
In this stamp rally, those Shinyan cats appear together as art♪
🎨 Character designs are by Junya Inoue, a popular manga artist from Shimanto City and a tourism ambassador (best known for BTOOOM! and Kaiju Jieitai).
Come play around Shimanto City with the Shinyan cats!
Don’t just press stamps — enjoy the fun of layering them to complete the art.
Explore nature, history, food, and adorable characters on a Shimanto City tour.
We’re sure your very own special piece will take shape✨
We look forward to your participation!
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