The official Mochi Udon Genjiro app is packed with the latest information and offers not only stamps to collect for coupons, but also the latest news for all Mochi Udon Genjiro fans. Enjoy our delicious Mochi Udon, made fresh in-house and available in portions of up to four servings at the same price.

・Upon downloading the official Mochi Udon Genjiro app, you will receive one first-time stamp.

*As of May 25, 2026. Benefits may change without notice.

*Only available upon initial registration.

・You will receive one stamp for each bowl of udon purchased. Collect 5 stamps to receive a free Torotama Tempura coupon, and 10 stamps to receive a free Large Shrimp Tempura coupon.

*Stamps will be awarded the day after your purchase.

*Stamps can be awarded up to 3 times per day.

*Stamps are valid for one year from your last visit. Please note that they will automatically expire after one year.

* Coupons obtained by collecting stamps are valid for 120 days.

* As of May 25, 2026. Benefits may change without notice.

* Receive various advantageous coupons from campaigns and other promotions.
* Receive a coupon for a free Torotama Tempura with 5 stamps, and a coupon for a free Jūebi Tempura with 10 stamps.
* As of May 25, 2026. Coupon contents may change without notice.
* All coupons have expiration dates.

* You can register as a member using your LINE ID/email address.
* If you forget your password, you can reset it from "Forgot Password".
* Please set your email to receive emails from info@app.genjirou.jp.

[Notes]
* This app uses the internet to display the latest information.
* Please note that it may not work properly on some operating systems or some models.
* We do not guarantee operation on tablet devices. Please be aware of this in advance.