Long-Term Warranty Available Only from KAⅡDesign & Work
A home is not simply something that is completed once construction ends—it is a place meant to be lived in for decades. KAⅡ provides a comprehensive after-sales support system to ensure long-term peace of mind. This includes a 10-year complimentary inspection program, Housing Defect Liability Insurance covering structural components for 10 years, and a Ground Warranty covering settlement or
subsidence for 20 years, establishing a robust support framework for homeowners.
20-Year Initial Structural Warranty Standard Specification with Complimentary Home Inspection
In most standard warranty programs, the structural warranty period is 10 years from the date of handover.
However, KAⅡ provides a 20-year structural warranty as a standard specification.
Specifically, if defects are discovered in structurally critical components or parts responsible for preventing water intrusion, as defined under Japan’s Housing Quality Assurance Act, KAⅡ will repair them free of charge.
Under typical warranty systems, coverage ends after the 10-year defect liability period, or can only be extended through paid maintenance services.
In contrast, KAⅡ conducts a complimentary home inspection at the end of the initial 10-year period, and continues the warranty coverage for an additional 10 years.
10-Year Complimentary Inspection Program and Long-Term Inspection System
After handover, we conduct complimentary inspections at 3 months, 1 year, 2 years, 5 years, and 10 years to ensure the ongoing condition and performance of the home.
For homeowners who wish to continue inspections, paid inspections are available every 10 years up to 30 years after construction.
- 3 Months After Completion … Complimentary Inspection
- 1 Year After Completion … Complimentary Inspection
- 2 Years After Completion … Complimentary Inspection
- 5 Years After Completion … Complimentary Inspection
- 10 Years After Completion … Complimentary Inspection
- 20 Years After Completion … Complimentary Inspection
- 30 Years After Completion … Complimentary Inspection
Comparison with Standard Warranty Programs
In typical cases, between the 10th and 20th year after handover, repair costs such as roof leak repairs often range from approximately ¥600,000 to ¥900,000.
In some cases, total repair costs may exceed ¥2,000,000.
At KAⅡ, any unexpected defects occurring within 20 years after handover are repaired without additional cost to the homeowner.
10-Year Structural Warranty
Housing Defect Liability Insurance
If defects related to structural durability or waterproofing performance are discovered within 10 years after handover, the repair costs are covered by insurance. This system provides homeowners with reliable protection in the event of structural defects.
Ground Warranty System
20-Year Coverage up to ¥50 Million
KAⅡ also provides strong protection for the ground supporting the home.
For damage caused by di erential settlement—where the building or ground shifts unevenly under structural weight—the warranty covers restoration costs and temporary housing expenses for 20 years from the date of handover, up to ¥50 million per incident.
Even the unseen ground beneath your home is securely protected.
10-Year Home Equipment Warranty Standard Specification at KAⅡ
KAⅡ provides 10 years of repair coverage for residential equipment, including system kitchens, water heaters, and intercom systems, even after manufacturer warranties have expired.
Although equipment failure rates typically increase after five years of installation, most manufacturer warranties cover only approximately one year.
If equipment failure occurs, KAⅡ will provide free repairs based on the terms specified in the manufacturer’s warranty conditions.
The 24-hour ventilation system is optional.
Six Comprehensive Support Benefits
Repair and replacement costs are covered for up to 10 years after construction.
Unlimited Repair Requests
Repairs can be performed multiple times for the same equipment
No Labor charges
No Service Call or Technical Fees
Coverage for Age-Related Failures
Covers equipment failures excluding consumables
No Pre-Screening Required
Applies to designated equipment systems
24/7 Customer Support
A dedicated call center available year-round
Equivalent Replacement Provided
Replacement with an equivalent product regardless of price
7 Major Covered Equipment Systems
Excludes equipment not installed.
System Kitchen
- Range Hood
- Gas Cooktop or IH Induction Cooktop
- Mixer Faucet
- Dishwasher
System Bath Unit
- Bathroom Dryer or Ventilation Fan
- Mixer Faucet
- Lighting Fixture
- Control Panel
Bathroom Vanity
Mirror excluded
- Vanity Cabinet
- Mixer Faucet
Toilet Units (×2)
- Bidet Toilet Seat
Water Heater (Gas / Oil)
- Gas Water Heater
- Control Panel
Intercom System
24-Hour Ventilation System
No Service Call Fees, Installation Fees, or Technical Charges
All repairs covered under manufacturer warranty conditions.
Covered Failure Causes
- Circuit Board / Sensor Failure
- Motor Replacement
- Remote Controller Replacement
- Internal Component Defects
- Controller Replacement, etc.
Non-Covered Failure Causes
- Consumable Replacement
- User Negligence or External Damage
- Pipe Blockage or Water Leakage
- Issues Resolved by Cleaning, Adjustment, or Maintenance
- Cases Covered by Insurance
Warranty Exclusions
The following cases are excluded from warranty coverage.
| Accidental Drop or Physical Damage | Consumable Replacement | Fire or Natural Disasters | Plumbing or Water Supply Leakage |
| Wear and Tear of Consumables | Cleaning and Maintenance | Theft or Loss | Other equipment not listed above |