Seongsu pizzeria with birthday lettering pizza: Pizza Slice Seoul

In short

Pizza Slice Seoul is a slice pizza shop on Achasan-ro in Seongsu-dong, Seongdong-gu, Seoul, and a branch of a slice pizza brand that started in Tokyo. On a weekend afternoon the writer picked jalapeño cream cheese, Hawaiian and meatball slices, each bigger than a palm on a crisp American-style crust, and also looked into the shop's lettering pizza for birthdays and anniversaries. At about 7,000 won a slice, two slices make a meal, and Pizza Slice Seoul is an easy pick in Seongsu for friends, dates or eating alone.

A slice of pizza at Pizza Slice Seoul

Good to know

Getting there
Seongsu Station Exit 2 · 7-min walk (store listing, Oct 6, 2026)
Location
Basement level 1, 159 Achasan-ro, Seongdong-gu, Seoul
Hours
Daily 11:00 AM–8:00 PM (last order 7:30 PM)
Price
About 7,000 won per slice
What we ordered
Jalapeño cream cheese, Hawaiian and meatball slices
Pizza options
Cheese, pepperoni, mushroom, jalapeño cream cheese, homemade meatball, Hawaiian and more
Sides and drinks
Fries, buffalo wings, beer, cocktails
Lettering pizza
Pizza with a birthday or anniversary message; best to ask in advance
Price reference
₩7,000 ≈ $5.3 (2026-10-12)

as written by the visitor on Oct 11, 2026

Main image of Pizza Slice Seoul in Seongsu

These days Seongsu has lots of restaurants where you get great atmosphere and great food at the same time, right?

A slice of pizza at Pizza Slice Seoul

What is Pizza Slice Seoul in Seongsu?

Pizza Slice Seoul is a branch of an original slice pizza brand that started in Tokyo, in the basement level of Achasan-ro in Seongsu. If you want to try something a little different or need a casual place to eat with a friend, I'd recommend it, and the charm is that you can pick slices one by one to suit your taste.

- PIZZA SLICE SEOUL -

Inside Pizza Slice Seoul in Seongsu

You can enjoy pizza, sides and even beer in that trendy Seongsu atmosphere, so it suits anyone hunting for a hot Seongsu restaurant.

Pizza Slice Seoul in the basement level on Achasan-ro
Dining space at Pizza Slice Seoul
  • Location: 159 Achasan-ro, Seongdong-gu, Seoul, South Korea (basement level 1)
  • Hours: Daily 11:00 AM–8:00 PM (last order 7:30 PM)

Which pizza slices can you choose at Pizza Slice Seoul?

Pizza Slice Seoul serves a wide range of pizzas by the slice.

Pizza sold by the slice

Besides ordering a whole pie like at an ordinary pizza place, it's great for picking several flavors slice by slice.

Several kinds of slices to choose from
Various pizza options at Pizza Slice Seoul

The choices were varied too: cheese, pepperoni, mushroom, jalapeño cream cheese, homemade meatball, Hawaiian and so on. Whether you like plain, back-to-basics pizza or something with more personality, there's something for everyone.

Pizza with crispy, large American-style dough

Crisp American-style dough and the open kitchen

The dough here is crispy and big, like American-style dough, and that's the highlight. I went on a weekend afternoon and it was packed, so they were making pizza nonstop. With fresh, tasty toppings, even a single slice is hearty. It's a hot Seongsu spot.

Open kitchen where the pizza is made

You can watch the pizza being made in the open kitchen, which makes the meal feel lively. Fresh out of the oven, it somehow tasted even better.

What are the atmosphere and facilities like at Pizza Slice Seoul?

Interior with stylish furniture and lighting
Seating area inside Pizza Slice Seoul

Stylish furniture and lighting come together for a comfortable yet trendy mood. It's good for a casual meal with friends, for dropping in on a date, and fine for eating alone when you're out in Seongsu.

Trendy interior of the restaurant
Area around the hand-washing sink in the restaurant

If you don't want to miss out on either atmosphere or menu, it's worth adding to your list of hot Seongsu restaurants. I also really liked that there's a sink inside where you can wash your hands, so you can eat hygienically!

Oregano and other sauces on the table

Each table has a good variety of sauces and seasonings, and personally, the oregano was seriously delicious, haha.

Jalapeño cream cheese, Hawaiian and meatball slices: portion size and price

That day I ordered three kinds at Pizza Slice Seoul: jalapeño cream cheese, Hawaiian and meatball.

Ordered jalapeño cream cheese, Hawaiian and meatball pizza

My partner, who's on their nth visit, said these are so popular that they're often sold out on weekdays, so luckily they were available and we ordered right away, haha. The slices were much bigger than I expected.

A pizza slice bigger than a palm
Size comparison of a big pizza slice

One slice is about ₩7,000 and far bigger than a palm. If you're a little hungry between meals or eating it as a meal replacement, two slices was a good amount. Each pizza has different ingredients, so the flavors were full of personality too.

Three slices with different ingredients
The Hawaiian slice, the writer's favorite

Personally, my favorite was the Hawaiian, haha. There's beer and cocktails, and also fries and buffalo wings, so many tables were eating quite a feast.

Table with pizza and side dishes

Can Pizza Slice Seoul make lettering pizza for birthdays and anniversaries?

At Pizza Slice Seoul you can arrange a lettering pizza with the message you want for a birthday or anniversary. If you're planning a memorable event, it's worth a look.

Information on lettering pizza for anniversaries

It seemed like a nice way to add special meaning to an ordinary meal, haha. For a friend's birthday or an anniversary with a partner, any day that calls for a small event, making a different kind of memory with food sounds fun, so I'd like to use it myself someday, haha. Just note that it's best to ask ahead about the lettering pizza!

Lettering pizza with a message

If you want a good time with pizza in Seongsu, Pizza Slice Seoul is worth remembering. After eating, the café right next door makes it a perfect date route too :)

Where it is

Pizza Slice Seoul피자 슬라이스 서울

159 Achasan-ro, Seongdong-gu, Seoul, South Korea (basement level 1)서울특별시 성동구 아차산로 159 지하1층

Open in Google Maps

Local places · Restaurants