Japanese Apartment Layout Codes Explained (1R / 1K / 1DK / 1LDK)
Floor Plan (R・K・DK・LDK)
The number counts separate rooms; K is a kitchen, DK a dining kitchen, and LDK a living/dining/kitchen area. The code alone does not establish quality or permitted occupancy.
Sources checked
Layout codes describe space, not quality
The number counts habitable rooms apart from K, DK or LDK, not guaranteed usable bedrooms. A 1R usually combines kitchen and room; a 1K separates them. DK combines dining and kitchen; LDK adds living functions within that space. It does not guarantee a separate lounge or certify quality.
Read DK/LDK size with the room count
Advertising guidance gives lower size benchmarks: with one room, DK 4.5 jō and LDK 8 jō; with two or more, DK 6 jō and LDK 10 jō. These guide advertising descriptions, not building quality or construction standards. Do not treat every 1DK as a fixed 4.5–8 jō range.
ELB suggestion: check the plan, area, doors, windows, furniture sizes and circulation. Two rooms do not automatically permit sharing with friends. Obtain property approval for occupants, their relationship and later additions.
Practical checklist
- Check the actual separation of rooms, kitchen and living space.
- Test furniture dimensions against the floor plan.
- Confirm occupancy limits and permission before sharing.
References
Prepared from official and public sources. Checklists are ELB reading aids; confirm specific application, fee and contract terms with the relevant organization.