SAFETY-FIRST GUIDE

Age is only the start.
Choose by fit, development and labels.

A concise 0-to-5 guide based on current Japanese public safety sources.

Body fit

Check height, weight and posture

Development

Match rolling, sitting and mobility

Labels

Check limits, safety marks and the manual

Age-by-age decision timeline

Change what you check before needs change

Read across to see the priority at each stage. Darker cells flag checks worth doing early.

Focus	0–2 mo	3–5 mo	6–8 mo	9–11 mo	Age 1	Age 2	Ages 3–5
Sleep	Firm surface; keep the face area clear^[3]	Plan for rolling; no soft items^[3]	Never use a bouncer as a sleep space^[9][3]	Recheck rails and mattress height^[1][3]	Check falls and gaps^[1]	No adult-bed rails below 18 months^[6]	Recheck limits, assembly and gaps^[1][6]
Feeding	Follow preparation and cleaning directions^[2]	Start solids around 5–6 months when ready^[2]	Adjust food texture and utensils^[2]	Match bite size and texture to development^[2][4]	Use a stable, suitable chair^[1][7]	Supervise posture and bite size^[1]	Check food and utensil labels^[1]
Travel	Use an infant restraint that fits^[5]	Check carrier and stroller limits^[7]	Check developmental limits such as sitting^[7]	Buckle the stroller every time^[6]	Update the seat as the body grows^[5]	Recheck fit and installation^[5]	Required in cars below age six in Japan^[5]
Home	Separate sleep surfaces from temporary seats^[3][9]	Prevent falls before rolling starts^[1]	Fit gates and secure cords before crawling^[1][7]	Secure furniture before pulling up^[1]	Recheck stairs, water and furniture^[1]	Secure windows and climbing hazards^[1]	Keep updating what is within reach^[1]
Toys	Assume items may go in the mouth^[4]	Check for detachable small parts^[4]	Keep items under about 4 cm away^[4]	Clear small items from reachable areas^[4]	Check age label and damage^[4][6]	Check Japan's Child PSC label^[6]	Protect younger siblings from small parts^[4]

What matters at each age

What may be useful now—and what can often wait

Age	Often useful	Can often wait	Key checks
0–2 months	Bottles, diapers and bath supplies*	Solid-food tools and toddler meals	Safe sleep, easy cleaning and weight limits^[3][2]
3–5 months	A well-fitting carrier or outing supplies*	Toddler meals and seats needing independent sitting	Head control, falls and development^[1][7]
6–8 months	Feeding tools and fall/choking prevention*	Food and equipment intended for older children	Appropriate food texture and cleaning^[2][4]
9–11 months	Home-safety checks and feeding supplies*	Prepared meals labelled from 18 months	Furniture, stairs and small objects^[1][4]
Age 1+	Body-appropriate feeding, travel and safety items*	Any product below its stated age or body requirements	Height, weight, chewing and mobility^[1][5]

*Needs vary with feeding, home environment, development and family circumstances. Age alone never determines whether a product should be bought or used.

Stage checks

Review only your current stage

0–2 monthsSleep, feeding and bathingPrepare a safe sleep surfaceOpen checks ＋

Choose a firm, flat sleep surface and keep pillows, toys and towels away from the face.
Use a bouncer only briefly under supervision; move sleeping babies to an appropriate sleep surface.

^[3][9]

3–5 monthsAround rolling and more outingsPrevent falls earlyOpen checks ＋

Never leave baby alone on a bed or sofa; prepare a safer low space before rolling.
Japan's feeding guide uses around 5–6 months plus developmental readiness, not age alone.

^[1][2]

6–8 monthsStarting solids and mobilityMatch food and equipment to readinessOpen checks ＋

Adjust food texture and quantity to development and check age and allergen labels.
Only use strollers or chairs requiring independent sitting once that condition is met.

^[2][7]

9–11 monthsCrawling and pulling upUpdate everything within reachOpen checks ＋

Check stairs, cords, furniture and small objects under about 4 cm.
Use the stroller harness every time, even for short trips.

^[1][4][6]

Age 1Around first stepsRecheck body fit and behaviourOpen checks ＋

Check height, weight and developmental conditions as well as the age label.
Continue using a correctly installed, body-appropriate child restraint in cars.

^[1][5]

Age 2Climbing and longer reachInclude windows and waterOpen checks ＋

Check windows, balconies, bathrooms and hazards reached by climbing.
Never use an adult-bed rail below 18 months; follow the product's limits and fixing method.

^[1][6]

Ages 3–5More independent useRecheck labels and conditionOpen checks ＋

Match toy age labels, inspect damage and keep small parts away from younger siblings.
In Japan, child restraints are required below age six and may still be needed later for body fit.

^[4][5]

Every purchase

Five checks for any baby product

1
Limits
Use height, weight and development—not age alone
2
Safety
Check applicable Child PSC, SG and warning labels
3
Fit
Confirm vehicle, space, gaps and fixing method
4
Care
Check washing, drying, wear parts and inspection
5
Model
Check recalls and missing parts, including used items

Evidence and updates

Primary sources used

This page covers Japan. Rules change, so recheck the linked source and current product label when buying.

1
Children and Families Agency: Child accident prevention handbook (Mar 2026) ↗
Japan guidance for suffocation, falls, water, travel and other hazards ages 0–6
2
Ministry of Health, Labour and Welfare: Feeding and weaning guide (2019) ↗
Readiness and timing for starting complementary foods
3
Consumer Affairs Agency: Safe infant bedding ↗
Firm surface, clear face area and supine placement
4
Consumer Affairs Agency: Small-object ingestion ↗
About 4 cm, detachable parts and age labels
5
National Police Agency: Child restraints ↗
Japan's under-six rule, fit and correct installation
6
NITE: Child PSC label and infant-product safety ↗
Current rules and warnings for bed rails and strollers
7
Consumer Product Safety Association: SG products ↗
Certified categories including strollers, carriers, chairs and gates
8
Consumer Affairs Agency: Recall portal ↗
Check model numbers, especially for used or handed-down products
9
Consumer Affairs Agency: Baby bouncer falls and sleeping risks ↗
Use briefly under supervision and move a sleeping child to an appropriate bed

Content checked: 22 August 2026

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