Irwon-dong tonkatsu on a house-hunting walk: limited sirloin, Sioldon

In short

Sioldon Irwon Branch (시올돈 일원점) is an aged tonkatsu restaurant in the Irwon-dong food district across from Samsung Seoul Hospital in Gangnam, Seoul. On a house-hunting visit to the hospital area, the writer arrived around 1 p.m. and ordered the limited-quantity special sirloin katsu with extra cheese katsu and tenderloin katsu; the Sioldon cheese katsu stayed stretchy without separating even after cooling, the best cheese katsu the writer has ever had. Sioldon Irwon Branch is a tonkatsu spot where you will want to add even more cheese katsu next time.

Full spread of special sirloin katsu with cheese katsu and tenderloin katsu

Good to know

Getting there
Daecheong Station Exit 4 · 9-min walk (store listing, Oct 6, 2026)
Location
1st floor, 12 Irwon-ro 9-gil, Gangnam-gu, Seoul (Irwon-dong food district, across the road from Samsung Seoul Hospital)
Parking
Room for about 2 cars in front of the restaurant
Ordering
Order at the kiosk by the entrance and take your number ticket
Cooking time
Cooked to order, about 15 minutes
Takeout
₩2,000 off; pay at the counter
Ingredient origin
Everything is Korean-sourced except the chili powder
Seating
Tables for 4, tables for 2, and solo/couple seats
Promotion
A free can of soda for posting a Naver receipt review
Condiments
Whole-grain mustard, wasabi, pink salt and cold tea provided
Price reference
₩2,000 ≈ $1.5 (2026-10-12)

as written by the visitor on Jul 7, 2026

Why Sioldon Irwon Branch on a house-hunting trip near Samsung Seoul Hospital

Sioldon Irwon Branch (시올돈 일원점) is an aged tonkatsu (breaded pork cutlet) restaurant in the Irwon-dong food district, across the road from Samsung Seoul Hospital. I'd heard that with the population aging fast, areas around big hospitals are going to be the next hot thing, so I went to Samsung Seoul Hospital to scout the area. It sits where Gaepo, Daecheong, Suseo and Irwon-dong meet. I'd thought the area around Suseo Station was a great place to live, and it has a major hospital too!

Before looking around, let's eat. Across from the hospital in Irwon-dong there's a food district (?) even bigger than a regular food alley. I'm craving tonkatsu. Been a while, let's go! The sign says aged tonkatsu? So they age the meat.

Exterior of Sioldon Irwon Branch with its aged tonkatsu sign

Is there parking at Sioldon Irwon Branch?

In front of Sioldon Irwon Branch there's parking for about two cars. I arrived around 1 p.m. and there was a spot ^^ Only room for two, but hey, better than nothing!!!

Parking space in front of Sioldon Irwon Branch

Hehehe, so many kinds of katsu. Wait for me! I'm about to eat you!

Katsu menu poster at the entrance of Sioldon Irwon Branch
Menu notice posted outside Sioldon Irwon Branch

Lunch wait, ordering ahead and handy extras

At Sioldon Irwon Branch, cooking starts as soon as you order and takes about 15 minutes, so while you wait they take your order in advance and time the food to when a seat opens up. Once you step inside you can see the waitlist. I went after 1 p.m. and more than half the tables were still full, so peak mealtimes must have a long wait.

Maybe because it's right in front of a hospital and a school? They even have mouthwash and hair ties out!

Waitlist and entrance of Sioldon Irwon Branch
Mouthwash and hair ties provided at Sioldon Irwon Branch

How to order at Sioldon Irwon Branch and choose from the menu

You order at the kiosk by the entrance. Don't forget your number ticket~ There's a good-value set too. But I know what I want!

Menu screen on the entrance kiosk at Sioldon Irwon Branch
Value set menu at Sioldon Irwon Branch

Before picking, check the country of origin first~ Ooh, everything is domestic except the chili powder.

Country-of-origin sign at Sioldon Irwon Branch

Limited special sirloin katsu with cheese katsu and tenderloin katsu added

This day I ordered the limited-quantity special sirloin katsu, adding cheese katsu and tenderloin katsu. The words "limited quantity" on the poster outside caught my eye as I walked in. Can't walk past that, haha. I'm normally a cheese katsu lover, but a limited quantity means I'm going with the special sirloin this time.

Still, I can't give up cheese katsu. There's no add-on for the special sirloin, but there is one for cheese katsu, haha. So I added cheese katsu and tenderloin katsu to the special sirloin katsu. Ugh, I should have added one more cheese katsu. Spoiler: it was the best cheese katsu I've ever had!!

Order screen with limited-quantity special sirloin katsu and add-ons

Takeout at Sioldon Irwon Branch gets you ₩2,000 off, but you have to pay at the counter. ₩2,000 off, wow!!!!

Takeout discount notice at Sioldon Irwon Branch

Aged pork and seating at Sioldon Irwon Branch

So this must be what the "aged tonkatsu" on the sign meant. Pork, aging away~

Seating at Sioldon Irwon Branch is 4-person tables, 2-person tables, and solo or couple seats. I usually take a solo seat, but today I tried a 2-person table deep inside.

Pork aging at Sioldon Irwon Branch
Hall with 2-person and 4-person tables at Sioldon Irwon Branch
Solo and couple seats at Sioldon Irwon Branch

The tables were nearly full, and everyone but me was a man ^^; They say tonkatsu and jeyuk-bokkeum (spicy stir-fried pork) fight for the top spot among men's favorite foods... and that opening a tonkatsu place in front of a boys' school does well... that wasn't just a saying, haha. The students in uniform look so cute. They're boys, though, haha.

Interior of Sioldon Irwon Branch full of lunch customers

Write a Naver receipt review and you get a free can of cold soda~

Receipt review drink notice and tea on the table

I'm glad there's cold tea instead of plain water. And they stick Wi-Fi info at every seat, nice touch! No awkwardly standing up to hunt for the Wi-Fi details~ After eating, put your dishes from the tray into the return station.

Sioldon cheese katsu: does the cheese still stretch once it cools?

The food really did come out in about 15 minutes. Eeeek~~~~! It looks delicious~~~

Full spread of special sirloin katsu with cheese katsu and tenderloin katsu

The add-ons.

Added cheese katsu and tenderloin katsu

In Sioldon's cheese katsu, the meat, cheese and coating are stuck together like one body, and even after cooling the cheese didn't harden or separate. A quick bite before the cheese cools~ Wow~~~~ a masterpiece! Usually even fresh out of the fryer the cheese does its own thing, but here it's all one. The cheese isn't salty either, just rich and nutty~

I ate a leftover piece that had gone cold while I was eating the others, and the cheese hadn't hardened or separated, it still stretched, which was amazing. Of course, you have to bite from the side so your front teeth don't touch the cheese. The crunch held up too.. Next time I'm definitely eating loads of cheese katsu~~ So sad I only added one ㅜㅜ

Tenderloin katsu: the crust and cross-section

Sioldon's tenderloin katsu has a coating that's clearly different in thickness from other tonkatsu at a similar price. Look at that coating. The cross-section looks slightly glazed too. A reddish tint is a sign of fresh, good-grade pork~ So that's why the cross-section looks glossy and coated!

Reddish cross-section of Sioldon tenderloin katsu

How the limited special sirloin katsu tastes

Sioldon's limited-quantity special sirloin katsu is pounded thin and well, so it's a nice bite-size thickness, haha. Look at how thin the coating is here too. There's no gap at all, it clings right to the meat.

The left part seems to be a special cut. Glossy and chewy. For anyone who loves fat, this texture will drive you wild, haha.

Cross-section and coating of the limited-quantity special sirloin katsu

Best ways to eat tonkatsu at Sioldon Irwon Branch

Every table has instructions on how to eat it best.

Guide on the table for how to enjoy tonkatsu

First, a quick bite of the tenderloin. Enjoy the plain taste and texture of the tonkatsu without sauce~ Mmm~~~~ tender and moist.

A piece of tenderloin katsu eaten without sauce

They have whole-grain mustard, wasabi and pink salt. I tried it with wasabi and whole-grain mustard on top.

Tonkatsu topped with wasabi and whole-grain mustard
A piece of tonkatsu dipped in wasabi sauce

The sauce already has a little wasabi in it and that's good, and dipping it with whole-grain mustard is good too~ If you want more sauce, ask the staff and they'll give you some, just so you know.

After that I was inhaling it so fast there are no photos. I totally wiped the plates out, haha.

Where it is

Sioldon Irwon Branch시올돈 일원점

12 Irwon-ro 9-gil, Gangnam-gu, Seoul, South Korea (1st floor)서울특별시 강남구 일원로9길 12 1층

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