Yayoi-ken Japan Dining Guide: Unlimited Rice Refills, Free Dashi Chazuke, ¥390 Breakfast Sets & App Coupons

When living, studying, or working in Japan, finding a comforting meal with balanced grilled meat, fresh cabbage salad, miso soup, and hot steamed rice at a reasonable price is essential. Operated by Plenus (the parent company of the Hotto Motto bento chain), Yayoi-ken (やよい軒) is one of Japan’s most beloved Japanese set meal (定食 – Teishoku) restaurant chains.

What truly sets Yayoi-ken apart is its signature unlimited free white rice refill policy (ごはんおかわり自由) and its complimentary self-service hot dashi soup bar. Here is how to make the most of your meal and maximize your savings at Yayoi-ken across Japan.

1. The Gohan Okawari Robot and the secret of complimentary Dashi Chazuke

At traditional Japanese restaurants, asking staff for rice refills can sometimes feel intimidating if you do not speak fluent Japanese. At Yayoi-ken, the entire refill process is automated through a touchless dispenser called the ごはんおかわりロボ (Gohan Okawari Robo):

1. Whenever you order any standard Teishoku set meal, take your empty rice bowl up to the central condiment island.
2. Place your bowl directly under the dispenser nozzle and tap your desired portion size on the digital screen: 一口 (Hitokuchi – 50g), 小盛 (Small – 100g), 並盛 (Regular – 150g), or 中盛 (Medium – 200g).
3. Within two seconds, the machine fluffs and dispenses fresh, steaming hot rice into your bowl without touching shared serving spoons. You can refill as many times as you like at zero additional cost.

The real dining secret at Yayoi-ken, however, lies right next to the rice dispenser. A large thermal dispenser provides piping-hot, free dashi soup broth (だしサービス) infused with bonito flakes and konbu kelp, accompanied by jars of crunchy sesame-pickled radish (刻みごま漬け):

• Toward the end of your meal, take a small 50g or 100g rice refill.
• Add a spoonful of sesame pickles and a pinch of Japanese seven-spice chili pepper (七味唐辛子).
• Open the dashi tap and pour the rich golden broth over your rice bowl to create an authentic だし茶漬け (Dashi Chazuke). The savory fish broth warms your palate and cleanses away oily flavors, making it the perfect finish to any set meal.

2. Early morning Asa-teishoku breakfast sets starting from ¥390

For commuters and early risers, Yayoi-ken locations that open early offer an affordable breakfast menu (朝食, served daily from 05:00 to 11:00 AM):

• Natto Breakfast Set (納豆朝食, approx. ¥390 to ¥430 tax-included): Includes a pack of seasoned fermented natto beans, a fresh raw egg (or soft-boiled egg upon request), seasoned nori seaweed sheets, miso soup, and hot white rice. Even at this low price point, the free rice dispenser and dashi bar remain completely unlimited.
• Sausage and Fried Egg Set (目玉焼き朝食, approx. ¥490): Pairs a sunny-side-up fried egg with crispy sausages and fresh shredded cabbage.
• Grilled Salted Salmon Set (しゃけの塩焼朝食, approx. ¥560): Features a tender fillet of grilled salted salmon, ideal for a traditional Japanese morning protein boost.

3. Yayoi-ken official app tips: Spin the lucky wheel for free fried chicken

To save an extra ¥100 to ¥300 on every restaurant visit, install the official smartphone application やよい軒公式アプリ:

1. Daily Lucky Roulette (ラッキー回転): Each day you open the app, you can spin the digital roulette wheel once to collect 1 to 10 米ポイント (Kome Points). Redeeming accumulated points unlocks free side dish coupons, including a 2-piece plate of crispy fried chicken (から揚げ2個, worth about ¥200) or rolled egg omelets (玉子焼き).
2. Monthly Main Dish Coupons: The app regularly issues instant discount coupons worth ¥30 to ¥50 off seasonal favorites like Chicken Nanban (チキン南蛮定食) and Ginger Pork (しょうが焼き定食).
3. White Rice vs. Mochi-Mugi Barley Rice: At the entrance ticket machine, you will be prompted to select either standard white rice (白米) or fiber-rich pressed barley rice (もち麦ごはん). While barley rice is flavorful and nutritious, it requires an extra ¥30 to ¥80 fee and is ineligible for free refills at the machine. If you plan to enjoy generous refills and Dashi Chazuke, always select regular white rice (白米).