Izanau
Beta
  • English
  • 日本語
  • Articles
  • Jobs
  • About
  • Students
  • FAQ
  • Work Tips
  • Life Tips
  • Register
  • Log In
日本語
  • Home
  • Articles
  • Life
  • Share on LinkedIn
  • Share on Twitter
  • Share on Facebook
  • Share on Google+

Japanese Apartments: What’s the Difference Between 1R, 1K, 1DK, and 1LDK?

Tuesday, August 30, 2022

A beginners guide to Japanese houses. Understand the floor plans to help find the perfect home.

life in JapanLive in Japanapartments in Japan1R1K1DK1LDKFloor plans in JapanFind an Apartment in JapanLoft
Japanese Apartments: What’s the Difference Between 1R, 1K, 1DK, and 1LDK?

[Edited: May 28, 2024]

If you have ever searched for apartments in Japan you have certainly come across the acronyms R, K, DK, and LDK. Each of these letters is preceded by a number e.g. 1DK, 2K, 3LDK. But what do they all mean and how do they actually differ? Here is a basic guide to understanding Japanese apartment floorplans.

Terminology

  • R: Room
  • K: Kitchen
  • D: Dining
  • L: Living
  • S: Service Room
  • RF: Roof Floor
IK or IR Japanese apartment definition

1R: ONE ROOM

1R translates to a studio apartment. There is generally no partition between the entrance and the living area and the bathroom is most often a Unit Bath, meaning the toilet, sink, and bathing area are all in one room. 1Rs tend to also come with a small kitchenette. 

1K: ONE KITCHEN

A 1K apartment is slightly larger than a 1R apartment and is defined by the existence of a partition between the K (kitchen room) and the living/bedroom.  Often the kitchen space doubles as a corridor into the main room or can be like a foyer at the entrance of the apartment (see image on the right). In terms of size, 1K apartments are not much bigger than 1R apartments, however, if your preference is to have a division of space, a 1K apartment can be something to consider. 

kitchen space in 1K apartment in Japan

1DK: ONE DINING KITCHEN

A 1DK apartment is a 2-room apartment where one room is a kitchen/dining area and the second room is a bedroom. The difference between a 1K and a 1DK is that a second room that is smaller than 4.5 tatami mats (6.12m2) is considered a K and anything between 4.5 to 8 tatami mats (6.12 ~ 12.96 m2) are considered a DK.

1LDK: ONE  LIVING DINING KITCHEN

A 1 LDK is what is known outside of Japan as a standard one-bedroom apartment. In a 1LDK apartment, the living/dining/kitchen room is larger than 8.5 tatami mats (12.96 m2). These apartments are designed for multiple occupants (e.g. a couple) therefore the rent tends to be higher. 

Pro Tip: A way to get more space and save on rent is to find a 2DK and use one room as a living room and the other as a bedroom which is almost the same as a 1LDK.
(See floor plan image below)

1 bedroom apartment Japan, 1LDK
2DK, 2 room apartment Japan

S: SERVICE ROOM

Finally, there is S, which refers to the service room. The size of a service room can vary from 1 square meter to the size of a living room but is categorized as “storage” space because the room doesn’t meet certain criteria according to the Building Standard Law, such as sufficient windows or ventilation. If the room is large it can be used for any purpose but because it is not considered a “living” space they tend to have inferior facilities such as outlets.  

loft or RF in space in Japanese apartments

RF: ROOF FLOOR

RF or loft, in terms of building laws, is categorized as an attic/storage space. This means that no matter the size it is not considered part of the living space. However, the benefits of choosing an apartment with a loft are that it can function as extra space for your apartment. In addition, the ceiling will be higher in order to accommodate the loft space giving the apartment a more open feeling. 


When looking for apartments in Japan understand that the number in front of the apartment description indicates the number of rooms, not the number of bedrooms, as is common in other parts of the world. The naming of spaces or floorplans is strictly determined by Building Standard Laws so make sure you understand the basics of how Japanese apartments are structured before you venture out looking for an apartment.



If you are looking for a job in Japan, email us at info@izanau.com.

  • Share on LinkedIn
  • Share on Twitter
  • Share on Facebook
  • Share on Google+
About the Author
Nerea Inamar

I've been in Japan so long that I say my heart is Japanese. And still this country impresses me from time to time. In those moments I think, "That's why I love living in Japan."

  • Latest Jobs
Indie Game PR Consultant
Gaming
The company is looking for a PR Consultant to develop and execute PR strategies for indie games targeting international markets. This role involves managing multiple clients and game titles simultaneously, providing an e...
Monthly Salary ¥250K ~ ¥300K
Osaka Hommachi
Full-time
Apply Now
Japanese Gaming - Digital Content Creator
Gaming
Join a leading gaming company bridging Japan and the world! With PLAYISM (Japan’s top indie publisher) and AUTOMATON (Japan’s biggest PC gaming media), plus BtoB services like localization, LQA, and PR, they’re shaping t...
Monthly Salary ¥130K ~
Osaka Hommachi
Part-time
Apply Now
Houdini Artist
Other Media, Entertainment
Unleash your creativity as a Houdini Artist! Craft stunning effects—fire, water, explosions—for games and videos, or bring characters to life with CFX simulations (hair, fur, cloth, muscle). Push the boundaries of visual...
Yearly Salary ¥4.5M ~ ¥7.5M
Tokyo Toshima-ku
Full-time
Apply Now
Latest Articles
  • Tuesday, March 18, 2025
  • How to Hack Conversation in the Japanese Workplace

  • Friday, March 14, 2025
  • Three Essential Skills for Gaining Trust and Respect in the Japanese Workplace

  • Friday, March 7, 2025
  • 20 Years in a Japanese Company

  • Saturday, February 15, 2025
  • Preparing for Your Baby’s Arrival in Japan

  • Thursday, January 23, 2025
  • Buying a Car in Japan

  • Tuesday, January 7, 2025
  • From Hello to Hired: Excelling in Japanese Job Interviews

  • Wednesday, December 25, 2024
  • Tiny Toes, Tiny Costs: Pregnancy in Japan

  • Thursday, December 12, 2024
  • Pregnancy in Japan: A Foreign Mom’s Guide to Your First Prenatal Visit

See All Articles

Jobs In Japan Made Simple
About Izanau
  • Contact Us
SiteMap
  • Articles
  • Jobs
Terms of Use
  • For Candidates
  • For Corporations
Privacy
  • Privacy Policy
IZANAUパートナープログラム
  • 紹介会社様はこちら
IZANAUパートナープログラム
  • 外国人材を紹介したい方はこちら
Sign Up
  • For Candidates
  • For Corporations
Language
  • English
  • 日本語
Follow Us
  • TikTok
  • Facebook
  • LinkedIn
有料職業紹介事業許可番号 27-ユ-304078
The material on this site may not be reproduced, distributed, transmitted, cached or otherwise used, except with the prior written permission of Izanau. Copyright Another Discovery Inc.