Onidon: Tempura Rice Balls
2026-07-06 04:02:50

Introducing Onidon: A Fresh Take on Tempura Rice Balls and Donburi in Tokyo

Onidon: A Culinary Delight Unveiled in Tokyo



On July 7, 2026, a new dining concept called Onidon will make its debut at JR Ochanomizu Station, located within the bustling Ecute Edition Ochanomizu. This innovative eatery is a new offering from Tenya, renowned for its delicious tempura dishes, and is set to captivate the hearts and palates of locals and tourists alike. The Onidon concept was inspired by the delicious staff meals at Tenya, showcasing the perfect fusion of tempura and rice ball.

The Birth of Onidon



The journey of Onidon began on a particularly busy day at Tenya when a staff member decided to transform their typical tempura donburi into a rice ball. The delightful result was nothing short of a revelation! Quickly becoming a staff favorite, this rice ball, affectionately shortened to “onidon,” soon found its way into the hearts of regular customers who were eager for a taste. The goal was clear: share the joy of this culinary creation with everyone. Now, customers will have the chance to enjoy freshly made Onidon, served hot and quick alongside Tenya's famous pork soup.

Brand Concept of Onidon



At the core of Onidon lies the very essence of Tenya's staff meals. The restaurant leverages years of expertise in crafting delicious tempura efficiently while providing a lively atmosphere where patrons can witness the fresh tempura being prepared right in front of them. With a focus on serving hot, fresh, and quick rice balls, Onidon promises a unique dining experience.

Onidon not only serves delectable rice balls but pairs them with a rich, hearty pork soup, providing a fulfilling “one soup, one rice” experience that will satisfy both hunger and the soul.

Perfect for a quick lunch for solo diners, busy professionals, students between classes, or tourists on the go, Onidon caters to a wide range of needs throughout the day. The establishment balances high-quality dine-in experiences with the convenience of takeout, aiming for an expansion of multiple outlets from a limited space, making it a standout in the fast-casual dining scene.

Featured Onidon Menu Items


Here’s a glimpse of some of the must-try items:

Onidon Specials


  • - Onidon Special Egg Tempura: ¥490
  • - Onidon Special Shrimp Tempura: ¥560
  • - Onidon Special Anago Tempura: ¥580

Traditional Onidon


  • - Original Onidon: ¥370
  • - Squid and Pickled Ginger Onidon: ¥320
  • - Three Mushrooms Onidon: ¥310

Regular Rice Balls


  • - Sesame Kombu: ¥190
  • - Spicy Cod Roe: ¥250
  • - Grilled Salmon: ¥260

Side Menus


  • - Vegetable Pork Soup: ¥290
  • - Seaweed Soup: ¥190
  • - Tempura Sauce Chicken Nuggets (2 pcs): ¥260
  • - Homemade Pickled Napa Cabbage: ¥130

Special Opening Campaign with JB's TOKYO


To celebrate its launch, Onidon will host a collaborative campaign with JB's TOKYO, a newly opened craft burger shop within the same location. From July 7 to July 12, the first 30 customers at each store will receive a complimentary loaf of JB's homemade bread featuring the Onidon logo. Don’t miss your chance to grab this exclusive offer!

Store Details


Name: Onidon at Ecute Edition Ochanomizu
Address: 2-6 Kanda Surugadai, Chiyoda-ku, Tokyo, Japan (2F, outside ticket gates of JR Ochanomizu Station)
Access: Directly connected to JR Ochanomizu Station, 2-minute walk from Shin-Ochanomizu Station (Tokyo Metro Chiyoda Line, Exit B1)
Telephone: 070-1369-8854
Seating Capacity: 72
Store Area: 190.73 sqm (57.69 tsubo)
Operating Hours: Weekdays 10:00 AM - 10:00 PM (Last Order 9:30 PM) / Weekends & Holidays 10:00 AM - 9:00 PM (Last Order 8:30 PM)
Closed: As per facility schedule
Payment Methods: Cash, mobile payment, credit cards, electronic money
Reservations: Available via phone for takeout only

As Royal Group continues to innovate, Onidon stands as a testament to their commitment to delivering quality and convenience. For more information, visit the Royal Group’s YouTube Channel or their website. Experience the freshness of tempura rice balls like never before at Onidon, where culinary magic happens with every order!


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Topics Consumer Products & Retail)

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