# Dongjak Japanese restaurant for toriten bukkake udon: Kosi Isu Branch - By Dohyun J. (https://superchart.com/en/@seoul-last-call/) - Written Sep 10, 2026 - Updated Sep 13, 2026 - Local places › Restaurants › Dongjak, Seoul - Sponsored: This post was written with support for a visit to the restaurant. - English edition: https://superchart.com/en/@seoul-last-call/isu-koshi-tori-ten-bukkake/ - Also in: [한국어](https://superchart.com/ko/@seoul-last-call/isu-koshi-tori-ten-bukkake/index.md) ## In short Kosi Isu Branch is a Japanese restaurant in Dongjak, Seoul, serving handmade bukkake udon and fresh pork loin tonkatsu. On a weekday evening, I had toriten bukkake udon with 4,000 won tempura, assorted cutlets, and hot udon without a wait. Verdict: the springy noodles and light, crisp tempura are dishes I’ll crave again. ## Good to know - **Hours**: Daily 11:20–21:00 - **Last order**: 14:50, 20:30 - **Break time**: 15:20–17:00 - **Reservations**: Available for parties of 5 or more - **Parking**: 1 hour validated in the building's underground parking lot - **Seats**: 48 - **Toriten bukkake udon**: ₩11,000 - **Extra tempura**: ₩4,000 - **Assorted cutlets**: ₩14,500 - **Extra udon**: ₩3,500 *as written by the visitor on Sep 10, 2026* ![Kosi Isu Branch's signature handmade udon and tonkatsu](https://img.superchart.com/images/isu-koshi-tori-ten-bukkake/isu-koshi-tori-ten-bukkake-01-1nm0j-1200.webp) ## Handmade udon and fresh pork loin tonkatsu in Sadang-dong, near Isu Station Here begins my honest review of a Sadang-dong, near-Isu Station favorite known among locals—and featured on Master of Life—for fresh pork loin handmade tonkatsu and handmade bukkake udon! 🙌🏻 Kosi Isu Branch (코시 이수점), a great spot for ten bukkake udon and fresh pork loin tonkatsu. ## Kosi Isu Branch visit information 147-29 Sadang-dong, Dongjak-gu, Seoul - Daily 11:20–21:00 - Last orders at 14:50 and 20:30 - Break time 15:20–17:00 - Reservations available for parties of 5 or more - Parking available; 1 hour validated when using the building's underground parking lot - Separate restrooms for men and women ![Kosi Isu Branch store information](https://img.superchart.com/images/isu-koshi-tori-ten-bukkake/isu-koshi-tori-ten-bukkake-02-6mvuc-966.webp) ![Kosi Isu Branch exterior and parking information](https://img.superchart.com/images/isu-koshi-tori-ten-bukkake/isu-koshi-tori-ten-bukkake-03-4iolz-966.webp) ![Kosi Isu Branch exterior and parking information](https://img.superchart.com/images/isu-koshi-tori-ten-bukkake/isu-koshi-tori-ten-bukkake-04-wyl9y-966.webp) ## Weekday-evening wait times and handmade noodles As you’d expect from a popular Isu restaurant, Kosi Isu Branch has waiting chairs by the entrance. I visited at dinner; turnover was fairly quick, and luckily, since it was a weekday, I got in with no wait 🍀 Kosi’s handmade noodles follow the traditional Sanuki method: a dough of just salt, water, and flour that undergoes a second 48-hour aging process, apparently! 👍🏻 ![Waiting chairs and handmade noodle information at Kosi Isu Branch](https://img.superchart.com/images/isu-koshi-tori-ten-bukkake/isu-koshi-tori-ten-bukkake-05-1wegb-966.webp) ## From bukkake udon to tonkatsu: the menu For the detailed menu—Kosi’s signature bukkake udon, maze udon, kama udon, tonkatsu, donburi rice bowls, gyudon, katsudon, karaage don, fried chicken, tempura, yubu chobap (seasoned tofu pouch sushi), and fried shrimp—please check the photos 📷 ![Udon and tonkatsu menu at Kosi Isu Branch](https://img.superchart.com/images/isu-koshi-tori-ten-bukkake/isu-koshi-tori-ten-bukkake-06-j7usp-966.webp) ![Udon and tonkatsu menu at Kosi Isu Branch](https://img.superchart.com/images/isu-koshi-tori-ten-bukkake/isu-koshi-tori-ten-bukkake-07-1174f-966.webp) ![Udon and tonkatsu menu at Kosi Isu Branch](https://img.superchart.com/images/isu-koshi-tori-ten-bukkake/isu-koshi-tori-ten-bukkake-08-zii8t-966.webp) ![Udon and tonkatsu menu at Kosi Isu Branch](https://img.superchart.com/images/isu-koshi-tori-ten-bukkake/isu-koshi-tori-ten-bukkake-09-b6b44-966.webp) ## A Japanese-style interior that also works for solo dining Inside, there are window-side counter seats for one, two-person tables, four-person tables, and more. Lots of people were eating alone, so I think it would be great for a solo meal near Isu Station too. The interior has a Japanese feel 🫶🏻 ![Window-side counter seats and tables inside Kosi Isu Branch](https://img.superchart.com/images/isu-koshi-tori-ten-bukkake/isu-koshi-tori-ten-bukkake-10-10b2b-966.webp) ![Window-side counter seats and tables inside Kosi Isu Branch](https://img.superchart.com/images/isu-koshi-tori-ten-bukkake/isu-koshi-tori-ten-bukkake-11-54e54-966.webp) Every table is set with salt and pepper, sesame seeds, utensils, wet wipes, paper cups, and more 👍🏻 ![Basic seasonings and tableware on the table](https://img.superchart.com/images/isu-koshi-tori-ten-bukkake/isu-koshi-tori-ten-bukkake-12-1m7zj-966.webp) ## A full toriten bukkake udon and tempura spread Toriten bukkake udon (11.0), plus extra tempura (4.0). It came generously set out with salad, kkakdugi (cubed radish kimchi), danmuji (pickled radish), and a soy dipping sauce for the fried items. Such a neat, satisfying bukkake udon spread. I absolutely love the design of the bowl holding the tsuyu dipping broth 🫶🏻 ![Toriten bukkake udon with extra tempura](https://img.superchart.com/images/isu-koshi-tori-ten-bukkake/isu-koshi-tori-ten-bukkake-13-1ma5b-966.webp) ![Toriten bukkake udon with extra tempura](https://img.superchart.com/images/isu-koshi-tori-ten-bukkake/isu-koshi-tori-ten-bukkake-14-1yjus-966.webp) The beautifully plated handmade udon, karaage, toppings, and even the included yubu chobap and tempura made for a dreamy visual 🫠 ### How do you eat bukkake udon? I looked it up because I was curious about both the restaurant and dish names. Kosi refers to elasticity, viscosity, and a chewy texture, while bukkake udon is a cold udon dish eaten by pouring tsuyu over it. Pour Kosi’s soy sauce, brought in from Japan, over the noodles and the ten bukkake udon is complete. Let’s admire that beautiful visual ☺️ ![Ten bukkake udon served with tsuyu](https://img.superchart.com/images/isu-koshi-tori-ten-bukkake/isu-koshi-tori-ten-bukkake-15-18dk8-966.webp) ![Ten bukkake udon served with tsuyu](https://img.superchart.com/images/isu-koshi-tori-ten-bukkake/isu-koshi-tori-ten-bukkake-16-rpib3-966.webp) ![Ten bukkake udon served with tsuyu](https://img.superchart.com/images/isu-koshi-tori-ten-bukkake/isu-koshi-tori-ten-bukkake-17-mqkgz-966.webp) Worthy of a Master of Life feature, Kosi’s handmade udon noodles are wonderfully chewy and springy. They pair so well with the tsuyu—really delicious. I’ve fallen for the charms of cold udon, hehe 🫶🏻 The fried items are made with clean oil too, so they’re crisp and light. Kosi’s bukkake udon feels like something I’ll think about regularly 🫠 ![Chewy handmade bukkake udon and fried items](https://img.superchart.com/images/isu-koshi-tori-ten-bukkake/isu-koshi-tori-ten-bukkake-18-4g3ix-966.webp) ## Assorted cutlets and extra hot udon Assorted cutlets (14.5), extra udon (3.5). ![Assorted cutlets and extra udon menu](https://img.superchart.com/images/isu-koshi-tori-ten-bukkake/isu-koshi-tori-ten-bukkake-19-1s8nj-966.webp) Kosi’s tonkatsu is made with domestic fresh pork loin, pounded daily and fried to order. The coating is crisp outside, while the loin within is mild and moist—so good 🤍 You can dip it to your taste in tartar sauce, tonkatsu sauce, pink salt, or wasabi 👍🏻 ![Fresh pork loin handmade tonkatsu and extra hot udon](https://img.superchart.com/images/isu-koshi-tori-ten-bukkake/isu-koshi-tori-ten-bukkake-20-1q7td-966.webp) The extra hot udon I added to the handmade tonkatsu meal also had that lively noodle texture, while the broth of Namhae anchovies and kelp had a deep flavor—delicious 🫶🏻 ## From family gatherings to dates This is a local favorite where people line up right at opening in Isu as well as at the other branches 🙌🏻 With a spacious 48-seat interior, it’s great for family gatherings, group meals, and dates; this Sadang-dong handmade-udon spot also validates 1 hour of building parking 🫶🏻 I highly recommend Kosi Isu Branch, a great Isu restaurant where you can enjoy handmade bukkake udon and fresh pork loin handmade tonkatsu, completed by time and good ingredients 👍🏻 ## Where it is - Kosi Isu Branch (코시 이수점) - 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/@seoul-last-call/isu-koshi-tori-ten-bukkake/ · https://superchart.com/llms.txt