Gilpost · Seongdong-gu, Seongsu-dong 2-ga
Japanese
Seusi Koyu
스시 코유 Koyu, one post was told, is meant as 'deep' — the deep taste of sushi.
Compiled from 28 blog posts read in fullSources →
A sushi omakase counter on the half-floor above Jiugwan, in an alley behind the Gentle Monster headquarters, a 10-15 minute walk from exit 3 of Seongsu Station. There are only two meals: a 60,000-won lunch course and a 120,000-won dinner course. You book a seating (lunch at 12:00 or 13:30), sit at the bar, and the chef hands you each piece. Most posts describe lunch as chawanmushi, then nigiri such as young yellow sea bream, red sea bream, squid, amberjack, sweet shrimp, monkfish liver, tuna, herring and sea eel, one fried dish, green-tangerine soba, tamagoyaki and yuzu sorbet. Nine posts say the chef offered or made an encore piece of their choice at the end. We read 30 posts from 22 June to 3 October 2026; 28 of them ate here (26 lunch, 1 dinner, 1 didn't say).
Data as of · Published ·
Location & hours
- Address서울특별시 성동구 뚝섬로 427-15, 1층 (성수동2가)427-15 Ttukseom-ro, Seongdong-gu, Seoul
- Phone010-6229-1626
- Typical spend₩12,000 – ₩130,000
- From the station6 posts say it is walkable from the station.
- Floor areaFloor area 96 m² · Status In business
When it opens
Of 16 posts: 16 wrote Daily 10:00–21:00.
| Daily | 10:00–21:00 | 16 of 16 posts |
|---|---|---|
| Break | 15:00–17:00 | 15 of 15 posts |
| Closed | None | 2 of 2 posts |
Counted from what bloggers wrote in their posts; we did not confirm it with the restaurant. Where the values differ, it may be a change over time rather than a disagreement, so we show when each one was written.
What sets it apart
- The miso soup is topped up without asking. Ten posts say it was refilled or swapped for a hot bowl once it cooled; one guessed they had it refilled three times.
- This is a reservation place. Fifteen posts booked ahead through CatchTable or Naver; one got the second lunch seating four days out and said it wasn't hard. Two posts that flagged a birthday when booking were served the tamagoyaki with a candle in it.
- One fried dish comes mid-course, and twelve posts call it crisp. What it is changes from day to day: fried monkfish, fried horse mackerel, or a potato croquette with octopus and corn.
- Tea is poured as you sit down. Six posts mention a free tea, some describing it as warm black-bean tea, others as a cold tea or barley tea.
4 more
- At lunch the room is lit by daylight. Seven posts mention the large windows, a window seat or the natural light over the counter.
- Eight posts call it quiet. One post noted a company group at the counter being loud and lively, so it didn't come down either way.
- Seven posts describe the chef or owner as friendly, and several say he asked how much rice and wasabi they wanted. One post found the chef reserved and said people looking for warm service might be let down.
- You walk there. Six posts describe the walk from the station: 10, 12 or about 15 minutes from Seongsu Station exit 3. One suggests taking bus 2413 from Ttukseom Station to the Gyeongsu Middle School stop, two minutes away.
What 28 bloggers said
reonchi omakase
Crispy batter
We read all 28 in full. The most common claims are “Crispy batter” (12) and “Not expensive” (9).
What they liked
What they struggled with
Things you can check on site
- Private room 16 of 28 posts
- Takes reservations 15 of 28 posts
- Free refills 10 of 28 posts
- Beer served 10 of 28 posts
- In a basement saying it is not 9 of 28 posts
- Large windows 7 of 28 posts
- Reachable by transit 6 of 28 posts
- Complimentary tea or drink 6 of 28 posts
- Toilet inside 6 of 28 posts
- Separate restrooms 5 of 28 posts
- Bag storage 3 of 28 posts
- Waiting area 2 of 28 posts
- One drink per person required saying it is not 2 of 28 posts
- Wine served 2 of 28 posts
- Air conditioned 1 of 28 posts
- Complimentary starter 1 of 28 posts
These are raw counts, not percentages. Someone who did not mention something is not someone who disagreed.
Who came, and with whom
- Solo visit 2 of 28 posts
- With a friend 2 of 28 posts
- Family visit 1 of 28 posts
- Date 1 of 28 posts
- Came by car 1 of 28 posts
Where it is
We could not find this shop’s own listing on Naver Map, so the link searches for its Korean name around this spot instead.
From the station
You walk there. Six posts describe the walk from the station: 10, 12 or about 15 minutes from Seongsu Station exit 3. One suggests taking bus 2413 from Ttukseom Station to the Gyeongsu Middle School stop, two minutes away.
Getting inside
| In a basement | yes 0 · no 9 (of 28 posts read) |
|---|---|
| Toilet inside | 6 of 28 posts |
| Separate restrooms | 5 of 28 posts |
It is half a floor up, not underground. Nine posts describe going up past Jiugwan on the ground floor to get in; they call it the 1.5th floor, half a floor up, or the second floor, but they all mean the same spot.
No post says whether a wheelchair or stroller can get in, or whether there is a lift or ramp. That doesn't mean there isn't one; nobody wrote about it. Three posts mention climbing stairs at the entrance.
The restrooms are inside. Six posts say so and five say they are separate for men and women; one post notes a coat closet by the payment counter.
No one mentioned: Second floor · Lift to the floor · Ramp at the door · Step at the entrance · Step-free access · Accessible toilet. That is not the same as there being none — it means we could not confirm it. Worth calling ahead, and do tell us: we will put it here.
How to read these posts
- Posts disclosing payment2 of 28 posts
- Posts saying they paid themselves4 of 28 posts
- Posts saying nothing either way22 of 28 posts
Posts that followed a TV spot
Of the 30 posts we gathered, 2 went up on a single day right after a TV spot and show no sign of a visit. They retell the broadcast, so we left them out of the counts.
We do not discard them. That a TV spot produced a burst of posts is itself something worth knowing about a place, and a star rating will not show it.
When the posts appeared
Month by month
| Month | Posts |
|---|---|
| 2026-06 | 1 |
| 2026-07 | 2 |
| 2026-08 | 13 |
| 2026-09 | 11 |
| 2026-10 | 1 |
What we do not know
- There is one four-seat private room at the back. Sixteen posts mention it, but five posts between 1 August and 13 September 2026 say it was "opening soon" and only the counter was in use. No later post says it has opened. One post was told that in the room the sushi comes five pieces to a plate rather than one at a time (hearsay).
- No post describes queueing. One says that because it is reservation-only there is no waiting, you just arrive on time. Nobody says whether walk-ins get a seat.
- Few posts say who they went with: one with family (a father's birthday), two alone, two with friends, one with a partner. The rest don't say.
- The "no kids" note comes from information boxes copied into several posts. No post describes going with children.
- Posts agree on what it costs: 60,000 won for lunch, 120,000 won for dinner. Only one August 2026 post gives 130,000 won for dinner. Nine posts call the price reasonable or not a burden; one found the whole course underwhelming and said they wouldn't return. Copied price lists give draft beer at 12,000 won, and corkage at 30,000 won a bottle for wine or sake and 50,000 won for whisky.
- Sixteen posts list opening hours of 10:00-21:00 daily with a 15:00-17:00 break, but all of it is copied from the listing. In practice you eat at a booked seating: lunch at 12:00 or 13:30, dinner at 18:30 (several posts mention a 19:00 dinner seating too). One post gives dinner times of 17:30 and 20:00. Two say there is no regular day off. One post finished the noon seating around 12:45; another says the meal took over an hour.
- Seven posts give the phone number 010-6229-1626. Most say they booked through CatchTable or Naver rather than by phone.
- Two posts disclose sponsorship and four say they paid their own way. Several posts carry the same hashtags in the same order. One post from 1 October 2026 copies an 30 August post almost word for word, so we did not count it as a visit.
Sources (28)
Every number above was counted from the posts below.
- 성수동 오마카세 스시 맛집 스시코유 디너코스 내돈내산 2026-10-03 · 웅렁각시
- [서울/성동구] 성수오마카세 어린 황돔 맛집 스시코유 런치 후기 2026-09-28 · 송도먹짱
- 성수 스시 오마카세 스시코유 런치코스 솔직후기 서울숲 데이트코.... 2026-09-26 · 멜로디의 신혼일상
- [성수] 성수 데이트코스 추천, 성수 오마카세 '스시코유' | 가성비 좋.... 2026-09-22 · My favorite things
- 성수데이트코스로 딱! 성수오마카세 스시 코유 2026-09-18 · 하루하루 먹고사는 이야기
- [성수 오마카세] 스시오마카세 코유 방문 후기, 잰틀몬스터 근처 가.... 2026-09-15 · 뽀우s STORY
- 성수오마카세 스시 코유 완벽했던 런치 코스 성수역 가성비 맛집 후.... 2026-09-13 · 선물 가득한 순간들
- 스시 코유 성수 오마카세 런치 코스 맛집 솔직 후기 2026-09-12 · 건강하고 야무진 Smart Life
- 성수오마카세 [스시코유] : 런치(6만원) 후기 2026-09-11 · 촤콜맅의 식도락 여행로그
- 성수오마카세 스시 코유 일식 맛집 성수동 데이트 코스 추천 2026-09-11 · MUYAHO
- 성수오마카세 스시코유 분위기부터 스시까지 만족했던 솔직후기 2026-09-09 · 민토르의 결혼로그๑•‿•๑
- 성수 가성비 오마카세 추천ㅣ스시코유 런치 6만원 내돈내산 후기 2026-09-02 · 방방곡곡 빙글빙글
- 성수 룸있는 오마카세 맛집 스시코유 혼밥 후기, 런치 6만원의 고퀄.... 2026-08-30 · 은텅현과 빽곰 땡큐
- 성수 | 정갈하고 깔끔한 성수 오마카세, 스시 코유 (엔트리급 오마카.... 2026-08-29 · Antifreeze
- [성수역] 스시 코유 / 성수오마카세 런치 후기 2026-08-29 · 맛도리를 찾아서
- 안갈집 / 성수 오마카세 추천 '스시코유' 런치 6만원·디너 12만원 스.... 2026-08-27 · 맛있는 시선과 신나는 프레임
- 성수 스시오마카세 스시코유 깔끔하고 맛있는 가성비 맛집 2026-08-27 · 소동이의 세상
- [스시코유] 성수 - 가성비와 맛 기념일 최고 런치 후기. 2026-08-25 · 솔직픽✨
- 성수일식 스시코유 런치로 먹고 온 성수오마카세 후기 2026-08-23 · ISTJ 의 이것저것
- [서울/성수] 스시오마카세 스시 코유 런치 오마카세 후기 2026-08-22 · 추억하기 위한 기록
- [서울/성동구] 성수 오마카세 ‘스시 코유’ 후기｜분위기 좋은 성.... 2026-08-15 · 나다운, 정다운, 한 페이지
- 성수오마카세 스시 코유 가성비 좋은 오마카세 런치 성수일식 추천 2026-08-10 · • 취향 기록장 •
- 성수오마카세 추천, 성수데이트코스 성수일식 스시 코유 평일런치 .... 2026-08-08 · 달빛도서관's 잡다한 일기:)
- 성수 오마카세 스시 코유 런치 오마카세 후기 정갈했던 6만원 코스 2026-08-01 · 깜장천사, 유럽여행 작가 황현희
- [성수 맛집]스시 코유 | 가성비 좋은 성수 오마카세 런치 후기 2026-08-01 · 탱이의 먹고 걷고 남기기
- 성수 점심회식장소 스시 오마카세 스시 코유 런치 이용후기 2026-07-31 · 아뱅의 한다! 리뷰
- 성수동 정갈한 스시야 스시코유 | 런치 오마카세 주류 2026-07-24 · 벌고쓰는삶
- 성수 오마카세 런치 제대로 뿌시다 성수맛집 스시 코유 2026-06-22 · 마늘젤라투의 히든 라이프
Of 215 candidate posts we opened 48 and kept 28 as evidence. We stop once 30 are confirmed: beyond that the counts grow in proportion without changing the answer.