Gilpost · Seongdong-gu, Seongsu-dong 2-ga
BarJapanese
Yoichi Seongsu
요이치 성수 Yoichi is the name of a town in Hokkaido, known for its Nikka whisky distillery; none of the posts say why the house took the name.
Compiled from 11 blog posts read in fullSources →
Yoichi Seongsu is an izakaya one floor below street level in an alley off Yeonmujang-gil, near exit 4 of Seongsu Station. Of the 11 posts by people who ate here, 10 ordered the aged sashimi platter (45,000 won for two), alongside Kansai-style Korean-beef sukiyaki (30,000 won per person), tantan hot pot (27,000 won) or Nagasaki champon hot pot (25,000 won), with highballs (9,000 won) or Kirin draft. Six posts give the hours as 5 p.m. to 1 a.m. We read 30 posts dated January 8 to October 3, 2026; 11 of them (January 8 to August 22) describe a visit. We set aside 16 that were about the Hokkaido town of Yoichi, the Sapporo sea-urchin shop Yoichiya or Nikka's Yoichi whisky, and did not count 3 list posts that only name the place.
Data as of · Published ·
Location & hours
- Address서울특별시 성동구 연무장길 39-21, 지1층 (성수동2가)39-21 Yeonmujang-gil, Seongdong-gu, Seoul
- Phone0507-1409-0503
- Typical spend₩9,000 – ₩60,000
- From the station6 posts say it is walkable from the station.
- Floor areaFloor area 63 m² · Status In business
When it opens
Of 6 posts: 6 wrote 17:00–01:00.
| No day given | 17:00–01:00 | 6 of 6 posts |
|---|---|---|
| Last order | 00:00 | 4 of 4 posts |
| Closed | Tuesday | 2 of 4 posts |
| Closed | Monday | 2 of 4 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
- Four posts say shrimp chips arrive first once you order. Several mention a house-made barley miso served with the sashimi.
- Six posts describe a mix of two- and four-seat tables, sofa seating for groups and a bar counter; two say the bar faces the kitchen. Two posts found the room small, with tables set fairly close together.
What 11 bloggers said
modum sukseong sasimi
Friendly staff
We read all 11 in full. The most common claims are “Friendly staff” (5) and “Quiet” (3).
What they liked
What they struggled with
Things you can check on site
- Reachable by transit 6 of 11 posts
- Seats to sit and eat 6 of 11 posts
- In a basement 5 of 11 posts
- Complimentary starter 4 of 11 posts
- Beer served 3 of 11 posts
- Takes reservations 2 of 11 posts
- Open kitchen 2 of 11 posts
- Toilet outside 2 of 11 posts
- Bag storage 2 of 11 posts
- Large windows 1 of 11 posts
- Takeout 1 of 11 posts
- Staff cook it at your table 1 of 11 posts
These are raw counts, not percentages. Someone who did not mention something is not someone who disagreed.
Parking
1 posts say you cannot park. None say you can.
| Posts saying you cannot | 1 of 11 posts |
|---|
One post says there is no parking in front and points to a nearby paid lot (Hyundai Terrace Tower). Three other posts list 'no parking' in copied info lines, which we did not count.
Who came, and with whom
- Date 3 of 11 posts
- Family visit 1 of 11 posts
- With a friend 1 of 11 posts
- Came with children 1 of 11 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
6 posts say it is walkable from the station.
Getting inside
| In a basement | 5 of 11 posts |
|---|---|
| Toilet inside | yes 0 · no 2 (of 11 posts read) |
You go downstairs. Five posts describe it as below ground; one notes that although it is a half-basement, big windows keep it from feeling closed in.
No one said whether there is a step at the entrance or whether a wheelchair or stroller can get in — only that the place is a floor down. That means no one wrote about it, not that access is impossible.
The toilet is outside the restaurant. Two posts say so: it is a shared toilet reached by leaving, turning right and going down to the half-basement level, and one mentions having to go up and down stairs. Two posts found it clean.
No one mentioned: Second floor · Lift to the floor · Ramp at the door · Step at the entrance · Step-free access · Accessible toilet · Separate restrooms. 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 11 posts
- Posts saying they paid themselves1 of 11 posts
- Posts saying nothing either way8 of 11 posts
Posts that followed a TV spot
Of the 14 posts we gathered, 3 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 |
|---|---|
| 2026-01 | 1 |
| 2026-05 | 4 |
| 2026-06 | 2 |
| 2026-07 | 2 |
| 2026-08 | 2 |
What we do not know
- Noise is split: three posts found it quiet enough for conversation; one (July 2026) found it a bit loud with a large group at the next table.
- Waiting is barely covered. One post (a weekday evening in January 2026) had no wait but was seated at the bar because the two-seat tables were full; another says it was full by the time they left. We don't know how long weekend evenings run.
- Six posts agree on opening hours of 5 p.m. to 1 a.m. (last order midnight), mostly copied from listings. The closing day is split: two posts say Monday, two say Tuesday — and one of the Tuesday posts also lists Tuesday-to-Sunday opening in the same line. Check before you go.
- One post calls it a little pricey, though in line with nearby izakayas. No one gave a total bill for a meal. Prices noted (May–August 2026): sashimi 45,000 won for two or 60,000 for three, highballs 9,000 won, draft beer 10,000 won.
- Four posts give the same phone number, 0507-1409-0503. Some say you can book through Naver or Catch Table; one diner booked ahead for a mother's birthday.
- Of the 11 visit posts, 2 disclose sponsorship, 1 says the writer paid, and 8 say nothing; one silent post uses the same hashtag set as a sponsored one. The claim that the chef came from the Shilla Hotel is repeated by three posts and we did not treat it as evidence.
Sources (11)
Every number above was counted from the posts below.
- 성수 이자카야 요이치 분위기 좋은 스키야키,숙성회 맛집 2026-08-22 · 구아바의 여행 다이어리
- [성수동 맛집] 모둠 사시미 & 후토마키가 대박인 일식 이자카야 '요.... 2026-08-11 · 맛집탐방기&일상&후기&여행
- 성수 이자카야 : 요이치 / 성수 술집 추천 / 성수 간술 성지 / 성수 이.... 2026-07-11 · 우당탕탕 셀໒꒰ྀི∩˃ ᵕ ˂∩꒱ྀི১
- 요이치 성수 /성수 이자카야 2026-07-02 · hyoDAILY
- 요이치 성수 이자카야 2026-06-23 · everyday gains
- 성수 요이치성수 :) 숙성회 + 탄탄 나베 성수역 이자카야 맛집추천 2026-06-11 · 콩민의 아웃도어 여행!
- 성수 데이트 이자카야 요이치 숙성사시미 후기 2026-05-27 · 빙글빙글 돌아가는 땃쥐의 하루 · via Daum
- [성수 이자카야-요이치]맥주& 하이볼 무료 이벤트, 요즘 핫한 데이.... 2026-05-07 · 프로먹잘알 러뷰
- [성수] 숙성회가 맛있는 감성 이자카야 ‘요이치 성수’ 2026-05-07 · :)
- 서울 / 성수 신라호텔 출신 셰프님의 맛있는 음식들과 함께 데이트하기 좋은 성수 이자카야 [요이치 성수] 2026-05-06 · 놀고 먹는 동그리 당당 라이프 · via Daum
- [성수 이자카야] 숙성 사시미와 감칠맛 나는 나베가 있는 이자카야, .... 2026-01-08 · clover
Of 384 candidate posts we opened 95 and kept 11 as evidence. We stop once 30 are confirmed: beyond that the counts grow in proportion without changing the answer.