# Isu Station udon lunch with inari sushi included: Kosi Isu Branch - By Sena P. (https://superchart.com/en/@seoul-wooden-menu/) - Written Sep 14, 2026 - Local places › Restaurants › Dongjak, Seoul - Sponsored: This visit was sponsored by the business. - English edition: https://superchart.com/en/@seoul-wooden-menu/koshi-isu-bukkake-udon-katsu-lunch/ - Also in: [한국어](https://superchart.com/ko/@seoul-wooden-menu/koshi-isu-bukkake-udon-katsu-lunch/index.md) ## In short Kosi Isu Branch is a house-made udon restaurant in Dongjak, Seoul, connected to Isu Station Exit 9 on the first floor of the Isu Xi complex mall. My husband ordered the mixed katsu at 14,500 won plus 3,500 won for the kake udon set, while I had the house-made bukkake udon for 9,000 won with a tonkatsu added for 5,000 won, with inari sushi (fried tofu pockets stuffed with rice) included. The bukkake udon noodles, springier the longer you chew them, were the highlight of everything Kosi Isu Branch served that day. ## Good to know - **Location**: Connected to Isu Station Exit 9, 1st floor of the Isu Xi complex mall - **Parking**: Park on B2–B3 of the mall, then up to 1F; 1 hour free - **Hours**: 11:20–21:00 (break 15:20–17:00) - **Last order**: Lunch 14:50 / Dinner 20:30 - **Mixed katsu**: 14,500 won (set add-on 3,500 won) - **House-made bukkake udon**: 9,000 won - **Tonkatsu add-on**: 5,000 won *as written by the visitor on Sep 14, 2026* Today's post is about a visit to Kosi Isu Branch, an udon restaurant near Isu Station~! I was looking for somewhere to grab simple Japanese food near Isu Station and ended up having udon and tonkatsu with my husband >_< I've always loved udon and go hunting for good udon places, so I went in with high expectations when I heard Kosi Isu Branch makes its own noodles fresh every day from dough aged for 48 hours. ![Entrance to Kosi Isu Branch near Isu Station](https://img.superchart.com/images/koshi-isu-bukkake-udon-katsu-lunch/koshi-isu-bukkake-udon-katsu-lunch-01-g1kqa-1200.webp) ## Where is Kosi Isu Branch, and what are its hours and parking? Kosi Isu Branch is connected to Isu Station Exit 9, so it's easy to get to, and you can find it easily by parking on B2 or B3 of the Isu Xi complex mall and coming up to the 1st floor. Plus, you get 1 hour of free parking! Apparently it was featured on SBS's Master in the House and actor Kim Seung-soo praised it as a great restaurant. Walking in, the place was bigger than I expected. There's plenty of hall seating, so it's good for solo dining or a casual lunch for two, but it also looked comfortable for family meals. Hours are 11:20–21:00 with a break time of 15:20–17:00. Lunch last order is 14:50 and dinner last order is 20:30, so keep that in mind if you visit! ## Kosi Isu Branch menu and 48-hour aged house-made noodles ![Kosi Isu Branch udon and tonkatsu menu board](https://img.superchart.com/images/koshi-isu-bukkake-udon-katsu-lunch/koshi-isu-bukkake-udon-katsu-lunch-02-f32t3-900.webp) ![Menu board showing types of udon at Kosi Isu Branch](https://img.superchart.com/images/koshi-isu-bukkake-udon-katsu-lunch/koshi-isu-bukkake-udon-katsu-lunch-03-1o61i-900.webp) ![Set menu price board at Kosi Isu Branch](https://img.superchart.com/images/koshi-isu-bukkake-udon-katsu-lunch/koshi-isu-bukkake-udon-katsu-lunch-04-hrjj7-900.webp) ![In-store sign about house-made noodles at Kosi Isu Branch](https://img.superchart.com/images/koshi-isu-bukkake-udon-katsu-lunch/koshi-isu-bukkake-udon-katsu-lunch-05-1ta8p-900.webp) ![Store poster explaining the 48-hour aged house-made noodles](https://img.superchart.com/images/koshi-isu-bukkake-udon-katsu-lunch/koshi-isu-bukkake-udon-katsu-lunch-06-zkkaz-900.webp) ![Sign explaining Kosi Isu Branch's traditional Sanuki noodle-making method](https://img.superchart.com/images/koshi-isu-bukkake-udon-katsu-lunch/koshi-isu-bukkake-udon-katsu-lunch-07-12dk0-900.webp) The part Kosi emphasizes most compared to other udon restaurants is the noodles. They knead the dough with just three ingredients—salt, water, and flour—then let it go through a first and second fermentation over 48 hours before making noodles fresh each day, following traditional Japanese Sanuki methods. My husband ordered the mixed katsu + kake udon set, and I went with house-made bukkake udon + added tonkatsu. ![Two full spreads of udon and tonkatsu set on the table at Kosi Isu Branch](https://img.superchart.com/images/koshi-isu-bukkake-udon-katsu-lunch/koshi-isu-bukkake-udon-katsu-lunch-08-wytu7-900.webp) ![Mixed katsu kake udon set alongside bukkake udon](https://img.superchart.com/images/koshi-isu-bukkake-udon-katsu-lunch/koshi-isu-bukkake-udon-katsu-lunch-09-163da-900.webp) ## Mixed katsu kake udon set: sirloin tonkatsu and king shrimp katsu My husband ordered the mixed katsu for 14,500 won and added 3,500 won to make it a kake udon set. Kosi Isu Branch's mixed katsu comes with one fresh sirloin tonkatsu and one king shrimp katsu. ![Table spread of the mixed katsu kake udon set at Kosi Isu Branch](https://img.superchart.com/images/koshi-isu-bukkake-udon-katsu-lunch/koshi-isu-bukkake-udon-katsu-lunch-10-70gxn-900.webp) ![Thick fresh sirloin tonkatsu and king shrimp katsu](https://img.superchart.com/images/koshi-isu-bukkake-udon-katsu-lunch/koshi-isu-bukkake-udon-katsu-lunch-11-1k616-900.webp) You can see how thick the tonkatsu is, right..? We tried the fresh sirloin tonkatsu first, and the batter was crispy while the meat inside was juicy—really good condition. You could tell it was freshly fried and served hot. ![A juicy cross-section slice of the fresh sirloin tonkatsu](https://img.superchart.com/images/koshi-isu-bukkake-udon-katsu-lunch/koshi-isu-bukkake-udon-katsu-lunch-12-1czt0-900.webp) ![Close-up of the crispy-battered fresh sirloin tonkatsu](https://img.superchart.com/images/koshi-isu-bukkake-udon-katsu-lunch/koshi-isu-bukkake-udon-katsu-lunch-13-18cdc-900.webp) The king shrimp katsu was also seriously delicious… the shrimp itself had a plump, bouncy texture, a totally different flavor from the tonkatsu, so I highly recommend it if you like shrimp. ![King shrimp katsu with a plump, bouncy texture](https://img.superchart.com/images/koshi-isu-bukkake-udon-katsu-lunch/koshi-isu-bukkake-udon-katsu-lunch-14-13mzj-900.webp) Dipping the tonkatsu in the shrimp sauce was also amazing haha ![Lunch with my husband at Isu Station udon restaurant, including inari sushi and bukkake udon at Kosi Isu Branch](https://img.superchart.com/images/koshi-isu-bukkake-udon-katsu-lunch/koshi-isu-bukkake-udon-katsu-lunch-15-1nmn1-900.webp) ![Hot broth kake udon](https://img.superchart.com/images/koshi-isu-bukkake-udon-katsu-lunch/koshi-isu-bukkake-udon-katsu-lunch-16-ys5o4-900.webp) The kake udon we ordered alongside is basic udon with hot broth and udon noodles—the broth was clean and warm, pairing well with the tonkatsu. Fried food can get a bit greasy after a while, but sipping the hot udon broth in between made for a great combo. ## House-made bukkake udon at 9,000 won with a 5,000-won tonkatsu ![A bowl of house-made bukkake udon at Kosi Isu Branch](https://img.superchart.com/images/koshi-isu-bukkake-udon-katsu-lunch/koshi-isu-bukkake-udon-katsu-lunch-17-w2bgz-900.webp) ![Bukkake udon noodles with cold tsuyu poured over](https://img.superchart.com/images/koshi-isu-bukkake-udon-katsu-lunch/koshi-isu-bukkake-udon-katsu-lunch-18-1jg5k-900.webp) And the dish I ordered was the house-made bukkake udon for 9,000 won. I added tonkatsu on top for 5,000 won. Bukkake udon is a cold udon dish where you mix chilled noodles with cool tsuyu sauce. I usually love cold udon, and I wanted to really taste Kosi's house-made noodles, so I picked this menu! ![Bukkake udon served with complimentary inari sushi](https://img.superchart.com/images/koshi-isu-bukkake-udon-katsu-lunch/koshi-isu-bukkake-udon-katsu-lunch-19-1k1xh-900.webp) ![Table spread with bukkake udon, inari sushi, and added tonkatsu](https://img.superchart.com/images/koshi-isu-bukkake-udon-katsu-lunch/koshi-isu-bukkake-udon-katsu-lunch-20-1008k-900.webp) I was surprised that inari sushi (seasoned fried tofu pockets with rice) comes included by default ㄷㄷ With udon, tonkatsu, and inari sushi on the table, the meal turned out more substantial than I expected. The first thing I noticed with the very first bite was, of course, the chewiness of the noodles!!! The udon noodles weren't the kind that just slide down smoothly—they had a springy texture that got more noticeable the more you chewed, so the texture really stuck with me. Apparently the name 'Kosi' means 'chewy bite' in Japanese, and after eating it myself, I get why they named it that. Personally, of everything I ate that day, the bukkake udon was my favorite. ![Chopsticks lifting a strand of chewy udon noodles](https://img.superchart.com/images/koshi-isu-bukkake-udon-katsu-lunch/koshi-isu-bukkake-udon-katsu-lunch-21-1t044-900.webp) ![Close-up of bukkake udon noodles](https://img.superchart.com/images/koshi-isu-bukkake-udon-katsu-lunch/koshi-isu-bukkake-udon-katsu-lunch-22-1rhpb-900.webp) ![Plate of tonkatsu added for 5,000 won](https://img.superchart.com/images/koshi-isu-bukkake-udon-katsu-lunch/koshi-isu-bukkake-udon-katsu-lunch-23-1ic06-900.webp) And the tonkatsu I added to my udon for 5,000 won—honestly I thought it would just be a few small pieces to go with the udon, but the portion was bigger than expected. Udon alone might leave you a little unsatisfied, but adding the tonkatsu made it a much heartier meal. Compared to the tonkatsu in my husband's dish, the meat quality was just as good and fried nice and crispy, pairing well with the udon. ![Table with udon and the added tonkatsu placed together](https://img.superchart.com/images/koshi-isu-bukkake-udon-katsu-lunch/koshi-isu-bukkake-udon-katsu-lunch-24-98dq0-900.webp) ## Is Kosi Isu Branch worth it for a tonkatsu-and-udon lunch? I especially loved the chewy noodles, so next time I want to try other udon menus at Kosi Isu Branch. Personally, I enjoyed this as much as the udon at Chef Jung Ho-young's Udon Kaden, which I visited and paid for myself last time. If you're looking for a solo dining spot near Isu Station, or a good tonkatsu and udon restaurant, I highly recommend Kosi Isu Branch :) ## Where it is - Kosi Isu Branch (코시 이수점) - 1F 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/@seoul-wooden-menu/koshi-isu-bukkake-udon-katsu-lunch/ · https://superchart.com/llms.txt