# Dongjak udon restaurant weekday dinner with spicy gyudon: Kosi Isu - By Miyeon Chae (https://superchart.com/en/@dongne-side-table/) - Written Sep 17, 2026 - Local places › Restaurants › Dongjak, Seoul - Sponsored: This post was written as part of a paid visit sponsorship. - English edition: https://superchart.com/en/@dongne-side-table/koshi-isu-bukkake-udon-gyudon-dinner/ - Also in: [한국어](https://superchart.com/ko/@dongne-side-table/koshi-isu-bukkake-udon-gyudon-dinner/index.md) ## In short Kosi Isu Branch is a house-made udon and tonkatsu restaurant on the 1st floor of Isu Xi Apartment, about 100m from Isu Station Exit 9 in Dongjak, Seoul. On a weekday early evening, two diners ordered the toriten bukkake udon set (with tempura), a spicy gyudon (beef rice bowl) side and a Pepsi Zero for 27,500 won, and inari sushi plus side dishes made it plenty for two. Chewy house-made noodles, light toriten and a mild spicy gyudon make Kosi Isu Branch worth a return trip for the tonkatsu. ## Good to know - **Location**: 1st floor of Isu Xi Apartment, about 100m from Isu Station (Lines 4 and 7) Exit 9 - **Parking**: 1 hour free in the building's underground parking (B2–B3) - **Hours**: 11:20–15:20 (last order 14:50), 17:00–21:00 (last order 20:30) - **Order**: Toriten bukkake udon set (tempura) + spicy gyudon side + Pepsi Zero = 27,500 won - **How to order**: Kiosk - **Promotion**: Free canned drink for posting a Naver receipt review *as written by the visitor on Sep 17, 2026* ## How an Isu Station restaurant search led to Kosi Isu Branch I was looking for somewhere to eat dinner near Isu Station when I came across Kosi Isu Branch. It was a weekday early evening, and my boyfriend and I searched "Isu Station restaurants" together — once I saw the menu, my mind was already made up haha. ![Exterior and signage of Kosi Isu Branch on the 1st floor of Isu Xi Apartment](https://img.superchart.com/images/koshi-isu-bukkake-udon-gyudon-dinner/koshi-isu-bukkake-udon-gyudon-dinner-01-ovvtk-966.webp) *Exterior of Kosi Isu Branch* The exterior and signage were clean, making it a good spot for families or couples too. ![View around the entrance of Kosi Isu Branch](https://img.superchart.com/images/koshi-isu-bukkake-udon-gyudon-dinner/koshi-isu-bukkake-udon-gyudon-dinner-02-19jdt-966.webp) ## Kosi Isu Branch location, parking and opening hours Kosi Isu Branch is on the 1st floor of Isu Xi Apartment. The store is marked on the apartment complex's directory. It's about 100m from Exit 9 of Isu Station (Lines 4 and 7). Kosi Isu Branch offers 1 hour of free parking if you use the building's underground parking (B2–B3)! - Hours: 11:20–15:20 (last order 14:50) - Afternoon: 17:00–21:00 (last order 20:30) ![Store directory for the 1st-floor commercial units of Isu Xi Apartment](https://img.superchart.com/images/koshi-isu-bukkake-udon-gyudon-dinner/koshi-isu-bukkake-udon-gyudon-dinner-03-dyo2e-966.webp) *Store directory on the 1st floor of Isu Xi* ## Inside Kosi Isu Branch and the house-made noodle notice Once inside, there are several tables. Wood tables, black chairs, and indirect lighting gave it a cozy feel. Even on a weekday early evening, there were quite a few customers. ![Dining tables at Kosi Isu Branch on a weekday early evening](https://img.superchart.com/images/koshi-isu-bukkake-udon-gyudon-dinner/koshi-isu-bukkake-udon-gyudon-dinner-04-1bcvj-966.webp) *Other guests eating at nearby tables* The tables were spaced generously, so we could eat comfortably without worrying about the neighboring table. There was also a notice saying the noodles are hand-kneaded in-house. ![Wood tables and black chairs spaced generously apart](https://img.superchart.com/images/koshi-isu-bukkake-udon-gyudon-dinner/koshi-isu-bukkake-udon-gyudon-dinner-05-10d70-966.webp) Overall the store was clean and well-managed hygiene-wise — totally satisfied! ![Poster in the store explaining the house-made noodle process](https://img.superchart.com/images/koshi-isu-bukkake-udon-gyudon-dinner/koshi-isu-bukkake-udon-gyudon-dinner-06-9de8o-966.webp) *Hand-kneaded noodles! House-made noodle notice* The poster made me curious about the time and care that goes into the house-made noodles! You could also sense the owner's confidence haha. ## What two people get for 27,500 won: the kiosk order The menu had quite a variety — cold udon, warm udon, tonkatsu, and donburi. I was curious about the bukkake cold udon, so udon it was. ![Menu listing cold udon, warm udon, tonkatsu, and donburi](https://img.superchart.com/images/koshi-isu-bukkake-udon-gyudon-dinner/koshi-isu-bukkake-udon-gyudon-dinner-07-oafmi-966.webp) We ordered via kiosk. Adding the toriten bukkake udon set (tempura), a spicy gyudon side, and a Pepsi Zero, the total came to 27,500 won. It was a nice combo to share between two people. ![Order total shown on the kiosk payment screen](https://img.superchart.com/images/koshi-isu-bukkake-udon-gyudon-dinner/koshi-isu-bukkake-udon-gyudon-dinner-08-17vv0-966.webp) *Kiosk order complete, 27,500 won* When the food came out, the table was completely full. Udon, gyudon, tempura, plus inari sushi and side dishes came together — a pretty generous amount for two servings! ![A table for two packed with udon, gyudon, and tempura](https://img.superchart.com/images/koshi-isu-bukkake-udon-gyudon-dinner/koshi-isu-bukkake-udon-gyudon-dinner-09-5ucom-966.webp) We ate until we were seriously full haha, good stuff. > Chewy noodles, broth kept just moist enough. You can also check it out in video form! ![Udon set served with tempura, inari sushi, and side dishes](https://img.superchart.com/images/koshi-isu-bukkake-udon-gyudon-dinner/koshi-isu-bukkake-udon-gyudon-dinner-10-186uk-966.webp) *The udon set came with tempura, inari sushi, and side dishes* We ate the bukkake udon by pouring the tsuyu sauce over the noodles and toppings, mixing it all together, then pairing it with the tempura on the side! ![A bowl of bukkake udon mixed with tsuyu sauce](https://img.superchart.com/images/koshi-isu-bukkake-udon-gyudon-dinner/koshi-isu-bukkake-udon-gyudon-dinner-11-1rgng-966.webp) ## How does the toriten bukkake udon taste? Noodles and fried chicken True to the hand-kneaded claim, the noodles were really chewy! The tempura was toriten — fried chicken — and the batter wasn't thick, so it was light. Placing it over the noodles so the broth soaks in does soften that signature crispiness a bit, but it has its own charm that way. ![Toriten fried chicken placed on top of the udon noodles](https://img.superchart.com/images/koshi-isu-bukkake-udon-gyudon-dinner/koshi-isu-bukkake-udon-gyudon-dinner-12-1vwx1-966.webp) *Eating the fried chicken placed over the noodles* ### How spicy is the spicy gyudon at Kosi Isu Branch? The spicy gyudon was a rice bowl topped with beef and egg, seasoned to just the right level of pleasant spice — really not that spicy at all. The portion was also surprisingly generous! ![Spicy gyudon topped with beef and egg](https://img.superchart.com/images/koshi-isu-bukkake-udon-gyudon-dinner/koshi-isu-bukkake-udon-gyudon-dinner-13-1ryz9-966.webp) It was genuinely soft and savory, pairing really well with the udon~! ![A spoonful of gyudon lifted up](https://img.superchart.com/images/koshi-isu-bukkake-udon-gyudon-dinner/koshi-isu-bukkake-udon-gyudon-dinner-14-18isx-966.webp) ![Lifting up a strand of bukkake udon noodles](https://img.superchart.com/images/koshi-isu-bukkake-udon-gyudon-dinner/koshi-isu-bukkake-udon-gyudon-dinner-15-18y77-966.webp) ![Table with both udon and gyudon being eaten together](https://img.superchart.com/images/koshi-isu-bukkake-udon-gyudon-dinner/koshi-isu-bukkake-udon-gyudon-dinner-16-1x05a-966.webp) Adding a gyudon side to the udon set made it plenty for two people to share! ![Receipt review event notice attached to the kiosk](https://img.superchart.com/images/koshi-isu-bukkake-udon-gyudon-dinner/koshi-isu-bukkake-udon-gyudon-dinner-17-22rh0-966.webp) *Naver receipt review event QR code on the kiosk* Writing a quick Naver receipt review gets you a free canned drink!! Can't pass that up, right? ## Worth it when you want udon or gyudon near Isu Station If you're near Isu Station and craving udon or gyudon someday, this is worth a visit! Next time I'll go for the tonkatsu — heard it's a must-try there!! ![Final shot of the finished udon set at Kosi Isu Branch](https://img.superchart.com/images/koshi-isu-bukkake-udon-gyudon-dinner/koshi-isu-bukkake-udon-gyudon-dinner-18-1lde3-1200.webp) ## Where it is - Kosi Isu Branch (코시 이수점) - 1F, Units 126–127, 300 Sadang-ro, Dongjak-gu, Seoul, South Korea - 서울특별시 동작구 사당로 300 1층 126호, 127호 - 37.4844642, 126.9808303 - Google Maps: https://www.google.com/maps/search/%EC%BD%94%EC%8B%9C%20%EC%9D%B4%EC%88%98%EC%A0%90/@37.4844642,126.9808303,17z --- Superchart · https://superchart.com/en/@dongne-side-table/koshi-isu-bukkake-udon-gyudon-dinner/ · https://superchart.com/llms.txt