Yeonnam-dong bar-seat tonkatsu, ₩21,000 triple katsu: Katsu Monster

In short

Katsu Monster Yeonnam Main Branch is a tonkatsu restaurant on Donggyo-ro 38-gil in Yeonnam-dong, Seoul, where the triple katsu plate of cheese katsu, tenderloin katsu and loin katsu costs 21,000 won. The bar seats make solo dining easy, and the portion is large enough that even a big eater at Katsu Monster left some and took it home. Worth ordering if you can never pick just one kind of katsu.

Main photo of the triple katsu at Katsu Monster Yeonnam Main Branch

Good to know

Triple katsu
21,000 won (cheese katsu + tenderloin katsu + loin katsu)
Seating
Bar seats, good for solo dining
Free extras
Mouthwash, jelly hair tie
Address
1F, Unit 101, 42-6 Donggyo-ro 38-gil, Mapo-gu, Seoul
Price reference
₩21,000 ≈ $15 (2026-09-19)

as written by the visitor on Sep 18, 2026

Main photo of the triple katsu at Katsu Monster Yeonnam Main Branch

Yeonnam-dong restaurant pick: Katsu Monster Yeonnam Main Branch 🖤💚

Yeonnam-dong restaurant pick: Katsu Monster Yeonnam Main Branch 🥢 Cheese katsu, tenderloin, and loin all at once! Triple katsu for ₩21,000. I found Katsu Monster Yeonnam Main Branch while looking for somewhere to eat alone in Yeonnam-dong 🍚 There are so many good restaurants in Yeonnam-dong that it's honestly hard to decide what to eat.

That day I suddenly craved crispy tonkatsu, so I searched for a katsu place and ended up here! I especially like trying a little of several kinds rather than sticking to one menu, so the moment I saw it on the menu, the triple katsu caught my eye 👀

A plate of triple katsu with three kinds of tonkatsu

Looking at it again, my mouth is watering!!!! ㅋ_ㅋ

Cross-section of cheese katsu with stretchy cheese

The cheese was insane!!!!

Interior of Katsu Monster Yeonnam Main Branch

Katsu Monster Yeonnam Main Branch: a Yeonnam-dong tonkatsu spot built for solo diners

Katsu Monster Yeonnam Main Branch had a vibe that made eating alone feel totally comfortable. Some places in Yeonnam-dong can make you feel a bit self-conscious eating solo, but this place felt easy for a relaxed meal alone!

Katsu Monster menu

Menu board at Katsu Monster Yeonnam Main Branch
Menu composition guide at Katsu Monster Yeonnam Main Branch

Tonkatsu is especially perfect for eating solo, right? Pick a menu, eat well, and you're done 😆 If you're looking for a solo dining spot in Yeonnam-dong like I was, this place is worth a visit.

Bar seating good for solo dining
A bar great for solo dining

A bar great for solo dining

View of Katsu Monster Yeonnam Main Branch from the bar seats

Seriously the top-tier tonkatsu spot in Yeonnam-dong, Katsu Monster >_<

Service

Anytime mouthwash and jelly hair tie service items at Katsu Monster Yeonnam Main Branch

An Anytime mouthwash and a jelly hair tie, nice touch >_<

Service items placed on the table

How big is the 21,000 won triple katsu plate?

The price is ₩21,000! You get to try cheese katsu + tenderloin katsu + loin katsu all in one dish, so it seemed like a pretty solid solo meal option. But honestly, the portion is way too much — even for a big eater like me... I got so full that I had to pack up the rest to go.

A full spread of triple katsu with rice and side dishes

The cheese katsu was so good ㅠㅁㅠ If I'd only eaten one kind of tonkatsu, I would've felt like I was missing out, but getting to try all three at once made it really satisfying. And it looked so appetizing from the start 🤍 With crispy-fried tonkatsu served alongside rice and side dishes, it was a pretty filling meal overall!

Close-up of crispy-fried loin katsu
Cross-section of a thick piece of tonkatsu

Loin katsu: the basics done right

Such a violently good-looking tonkatsu ㅠㅠ Crispy on the outside and melted right in my mouth 🥩 You can't talk about tonkatsu without mentioning the loin. The batter was crisped just right and let the meat's flavor really come through — I enjoyed it a lot. If the cheese katsu was savory and soft, the loin felt a bit more like classic tonkatsu. Eating all three together, I never got tired of it and kept reaching for more.

A plate with wasabi, salt, and pepper
A piece of tonkatsu dipped in salt

The wasabi + salt + pepper combo was also great

A piece of tonkatsu picked up with chopsticks
Cross-section showing crispy batter and juicy meat

More than anything, tonkatsu is all about the crispiness of the batter and the juiciness of the meat. It tasted even better than I expected, so I ate it feeling genuinely satisfied.

A piece of light, clean-tasting tenderloin katsu

Tenderloin katsu: the lean, clean-tasting cut

🤍 And personally, the tenderloin is the cut I always want to try when I eat tonkatsu. It's lighter and softer than the loin, so the balance between the batter and the meat was really nice. Getting to try several kinds at once, I went cheese katsu → tenderloin → loin in order and had fun noticing the differences in flavor between each.

Eating the triple katsu in the order of cheese, tenderloin, and loin katsu

Is Katsu Monster worth it for a solo meal in Yeonnam-dong? 🫶🏻

Personally, I was pretty satisfied with the triple katsu this time. Above all, I loved being able to try cheese katsu, tenderloin katsu, and loin katsu all in one order. For someone like me who has trouble picking just one, a menu like this is such a welcome option ㅋㅋㅋ At ₩21,000, it's a menu worth considering when you want a proper tonkatsu meal in Yeonnam-dong.

The triple katsu plate after finishing the meal

And since it's not awkward to eat here alone, it should work well for anyone looking for a solo dining spot in Yeonnam-dong! If you want delicious tonkatsu in Yeonnam-dong, or you have trouble choosing between cheese katsu, tenderloin, and loin, try the triple katsu and have all three like I did 😆🥢 I really enjoyed it that day, so next time I go to Yeonnam-dong I want to try some other menu items too! Totally recommend it — my cousin is coming to visit for Chuseok, so I'll probably be back!!!

Where it is

Katsu Monster Yeonnam Main Branch카츠몬스터 연남본점

1F 101, 42-6 Donggyo-ro 38-gil, Mapo-gu, Seoul, South Korea서울특별시 마포구 동교로38길 42-6 1층 101호 카츠몬스터 연남본점

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