Hidden among the rugged foothills of the Suzuka Mountains in southern Shiga Prefecture, Kōka City (甲賀市) is a land steeped in mystery, heritage, and artistry. Once an autonomous ninja stronghold, Kōka holds a unique place in Japan’s history.

Renowned as one of the birthplaces of ninjutsu, Kōka was home to the famous Kōga-ryū school of ninja arts, a powerful and often misunderstood part of Japan’s feudal past. Yet the city offers more than shadowy legends, it is also famed for its centuries-old Shigaraki ware ceramics, serene mountain museums, and nature.

A Brief History of Kōka

  • Once part of Ōmi Province, with roots stretching back to ancient Japan
  • Functioned as a self-governed ninja ikki during the Sengoku period
  • Rivaled Iga (Mie Prefecture) as a center for the development of ninjutsu
  • Minakuchi-juku served as a Tōkaidō post station and castle town during the Edo Period

Kōka’s mountainous terrain and natural isolation made it the perfect environment for ninja warriors to train, plot, and thrive in secrecy. Its strategic location along the Tokaido road also ensured the flow of culture, commerce, and influence. Today, this landscape remains rich with historical sites and artisan traditions that continue to shape its identity.

Things to Do in Kōka

Main Attractions:

  • Koka Ninja House: Explore a real former ninja house complete with hidden trapdoors, secret rooms, and escape tunnels
  • Shigaraki Ware Pottery: See the iconic tanuki (raccoon dog) statues that dot the area
  • Miho Muesum: View a private collection of Silk Road artifacts, classical antiquities, and Japanese treasures

Whether you’re drawn by ninja lore, traditional pottery, or tranquil nature, Kōka offers a surprisingly wide array of experiences. 

Step into the hidden world of feudal spies at the Kōka Ninja House, the former residence of ninja leader Mochizuki Izumonokami. The house appears ordinary on the outside, but the interior holds hidden trapdoors, secret rooms, and escape tunnels. Visitors can also experience a hands-on ninja star throwing experience.

The Shigaraki district in Koka is one of Japan’s Six Ancient Kilns (六古窯, Rokkoyō), making it one of the most historically significant and enduring ceramic towns in the country. Visit historic kilns, pottery studios, and craft galleries, and see the iconic tanuki (raccoon dog) statues that dot the area.

Recommended Tour: Snow Monkey Resort's 1-Day Tour from Nagoya: Myths and Mystery of Ninja and the Tokaido Road not only gives insight into the daily lives of ninja but also takes you along the most important route of Edo-era Japan, the Tokaido road, as you are led by an experienced English-speaking guide on a full-day tour from Nagoya.

Frequently Asked Questions (FAQ)

Is Kōka really the home of the ninjas?

Yes. Along with nearby Iga, Kōka is one of the two historical centers of ninjutsu. The Kōga-ryū school trained generations of spies, warriors, and covert operatives during Japan’s feudal era.

Can you visit an actual ninja house in Kōka?

Yes. The Kōka Ninja House is a real former ninja residence now open to visitors. It features hidden traps and weapon displays.

What is Shigaraki ware?

Shigaraki ceramics (also called Shigaraki ware) are ceramics produced near Koka which are prized for their rustic, earthy texture, natural ash glazes, and historical significance. The area is also famous for producing tanuki statues.

What’s the best time to visit Kōka?

Spring (cherry blossoms) and autumn (fall foliage) are especially beautiful. Shigaraki’s kilns are often active in autumn festivals, and summer is ideal for hiking the Suzuka Mountains.

Additional Tips

  • The Miho Museum is closed in winter—check seasonal hours before visiting
  • Consider a guided tour to learn more about ninja
  • Pair a trip to Koka with a day in Iga/Akeme 48 Waterfalls to see more of the region

Articles You Might Be Interested In