Design by where used × how often × how much. Reserve 15-20% of floor area for storage. Four hot zones: entrance, kitchen, bedroom, washroom.

1. Storage on the circulation path — never make things travel

The starting point of any storage plan is "keep things near where you use them." A vacuum stored upstairs but used downstairs; a coat tossed on a chair instead of hung in a closet — these are signs the storage sits off the circulation path. Trace your daily flows (morning routine, coming home, laundry, cooking) and scatter the right storage along those lines, and tidying becomes something you do "on the way." In Japanese house design, storage works better by position than by sheer volume.

2. Genkan storage — dirty floor, clean house

The doma storage (shoes-in cloakroom / SIC) beside the entrance holds not only shoes but strollers, outdoor gear, coats and delivery stock — all "with your shoes on." Because mud and sand never enter the living space, the interior stays clean. Make it walk-through, connecting the entrance hall to the interior, and the sequence "arrive → take off your coat → wash your hands" runs in a straight line. Even 1.6–3.3 m² makes a dramatic difference.

3. Family closet

Consolidating the whole family's clothing in one room — the family closet — is a popular move in recent luxury homes. Gather the laundry flow (wash → dry → fold → put away) in one place and the chore of distributing clothes to every room disappears. The ultimate form adjoins the changing room, laundry and closet as a single "laundry-room suite." A side benefit: each bedroom's closet can shrink, so the rooms live larger.

4. Oshiire, attics, and under-floor

Japan's traditional high-capacity stores are the oshiire, attic and under-floor. The oshiire holds not just futons but seasonal appliances and guest bedding. Attic storage under 1.4 m of headroom is, in most municipalities, excluded from floor area and storey count, so you gain volume without consuming FAR. Under-floor storage suits preserves and disaster stock. Pushing low-frequency items "up and down" keeps the living floor clear.

5. Hidden storage vs. display storage

Storage comes in two kinds: hidden and on display. Everyday items, wiring and stock that betray "lived-in clutter" go behind doors; books, ceramics, art and hobby tools go on open shelves to be seen — and how you split the two decides the quality of a space. Hide everything and it turns clinical; show everything and it turns chaotic, so a living room reads elegant at roughly 80% hidden, 20% shown. Display storage is most effective planned together with lighting.

6. Pantry and refrigerator placement

A kitchen's usability is all but decided by the pantry and the refrigerator's position. The pantry gathers food stock, cooking appliances and waste-sorting space — the key to keeping the kitchen permanently clear. As a rule the fridge sits at the start of the flow "entrance (groceries in) → fridge → sink → hob," and placing it so family members can grab a drink without crossing behind the cook reduces traffic conflicts. A pantry near the back door also shortens the route for food and recycling waste.

7. Standard dimensions worth remembering

Finally, the standard storage dimensions that help at the design stage. Master these and you can judge from a drawing alone whether a store is usable.

ItemStandard dimension
Clothes closet depth55–60 cm (hanger width)
Oshiire depth75–90 cm (futon)
Bookshelf depth25–30 cm (paperback–hardback)
Genkan doma storage1.6–3.3 m²
Pantry1.6–3.3 m²
Wall-cabinet underside140–150 cm from floor
Storage is less about "size" than "position and dimension." Place it in the right spot on the path, at the right size, and the home tidies itself.