Our Service

Foundation for Housing Warranty (HOW) provides following services:

  • Financial assistance to small and medium- sized house-builders in order to comply with the Act for Secure Execution of Defect Warranty Liability
  • Underwriting of re-insurance related to losses arising from intention or gross negligence
  • Research for Housing Defects, Warranty, Insurance, Quality Assessment, and Inspection in a fair and neutral standpoint

How conducts administrative work for following projects planned by from government.

  1. Upgrading houses to safe and higher-quality stock
  2. Promotion of offering of rental housing to persons who requires special assistance in securing housing,

Background of the Foundation

Company Name Foundation for Housing Warranty
Establishment 1980
Launch of the business 1982
Office Locations 3F 6-67 Kagurazaka Shinjuku-ku Tokyo 162-0825 Japan
Phone 81-3-6280-7241
Representative Hiroshi Sasaki



1. Housing & Home Warranty Programs World Research (2005)

2. Housing Warranty System in Japan (updated in December 2022)


The 14th International Housing & Home Warranty Conference (IHHWC) was held in Tokyo on Nov 2017. More than 200 hundred industry experts, construction professionals and decision-makers attended the conference from 17 countries. Using this opportunity, HOW and Institute of International Harmonization for Building and Housing (IIBH) sponsored workshop with French Agence Qualité Construction (AQC).
Mr. Laurent Peinaud, the President of AQC made a presentation:
“A flexible approach for an efficient building control system <What is a building control system?>”.

Terms of Use


Although HOW has taken every care to manage the Site, HOW assumes no responsibility regarding the safety of the contents of the Site or the reliability of information provided on the Site. HOW is not responsible to you for any damage that may be caused by the use of the Site and/or the information on the Site.
HOW may change or delete the information on the Site or may suspend or terminate the operation of the Site without any prior notice. HOW is not responsible to you for any inconvenience that may be caused by such changes or deletion of the information, or by such suspension or termination of the operation of the Site.

Privacy policy

The Foundation for Housing Warranty (hereinafter referred to as "HOW") shall not use any personal information obtained by HOW in the course of its business activities for any purpose other than the following:

  • HOW recognizes the importance of protecting personal information and will comply with the Act on the Protection of Personal Information (the "Personal Information Protection Act") and other relevant laws and regulations and will use personal information in a proper and appropriate manner.
  • HOW will take appropriate measures for security management.
  • HOW will take appropriate measures for the safe management of personal information in compliance with the Personal Information Protection Act and other relevant laws and regulations.

1.Collection of personal information

HOW will obtain personal information to the extent necessary for its business and by lawful and fair means.
HOW will acquire personal information by means of documents filled in when applying for a reinsurance contract or making an insurance claim, by filling in forms on HOW's website, by questionnaires and by other means.

2.Purpose of use of personal data.

HOW will use personal data in order to achieve the purpose of following business.

  • Supports for implementation of defects warranty
  • Projects for which subsidies are granted under designation from the government.
  • Research on defects warranty
  • Businesses listed in Article 19, Items 3 to 6 of the Act for Execution of Defects Warranty
  • Liability under Housing Quality Assurance Act.
  • Conducting questionnaires related to surveys and research
  • Providing information on events, seminars, etc., and other information.
  • Responding to opinions, requests and consultations.
  • Other peripheral work

3. Management of personal information

HOW shall comply with all laws and regulations relating to the protection of personal information and shall establish "Personal Information Management Regulations" for the handling of personal information provided.

HOW will comply with laws and regulations relating to the protection of personal information and will establish "Personal Information Management Regulations" for the handling of personal information provided and will handle it with extreme care.

Basic Policy on the Proper Handling of Specified Personal Information, etc.

HOW has established a basic policy to ensure the proper handling of specified personal information, etc. as an organization. 

HOW will comply with the Act on the Use of Numbers to Identify Specific Persons in Administrative Procedures, the Act on the Protection of Personal Information, and the Guidelines for the Appropriate Handling of Specified Personal Information (Business Edition) to ensure the appropriate handling of Specified Personal Information. HOW has established separate Rules for the Handling of Specified Personal Information in relation to security control measures for Specified Personal Information.

4. Implementation of security measures for personal information

HOW makes every effort to manage and operate personal information safely and takes reasonable and appropriate security measures to prevent unauthorised access, loss, damage, falsification, leakage or unauthorised extraction of personal information from outside HOW. Information entered in forms such as requests for information is protected by SSL encryption security.

5. Provision to third parties

Personal data will not be provided to third parties, except with the consent of the person concerned. However, in any of the following cases, the personal data of an individual will be disclosed or provided to a third party without the consent of the individual.

  • Where it is necessary for the protection of a person's life, body or property and it is difficult to obtain the consent of the person.
  • Where disclosure is particularly necessary for improving public health or promoting the sound development of children and it is difficult to obtain the consent of the person concerned.
  • Where it is necessary to cooperate with the government, a local authority or an individual or entity entrusted by one in executing the affairs prescribed by law, and where obtaining the consent of the person may hinder the performance of the relevant duties.
  • When required by law.

6. Procedure for disclosure of personal data

If you wish to request disclosure of personal data held by HOW, HOW will send you a prescribed form by fax or e-mail.
Please note that a separate fee may be charged for the above disclosure procedure.

7. correction of personal data

If the personal data held by HOW contains any untrue statement, HOW will take steps to correct, add to, delete, stop using or stop providing to third parties, so please contact us.

8. Cookie use

Handling of Cookies etc.
(1) Information from obtained from customers
This website acquires the following information when accessed by customers.

  • Information that identifies the terminal device (cookie information and other terminal device identification codes)
  • Customers’ use environments (e.g. connection source IP address, OS, browser information) and location information
  • History of pages viewed by customers on this website(access history)

This information is automatically recorded mainly through cookies etc. when customers use the site. Cookies can be disabled or deleted by changing browser settings. However, this can result in problems such as the inability to use services, so we recommend enabling them.

Cookies: A mechanism for storing server information on the computer of a customer accessing a website. By recording the date and time of a customer’s last visit, the number of visits, and information once inputted, the customer can easily use the previously selected functions. Please note that cookies can identify information about customers’ computers, but do not include personally identifiable information (e.g., name, address, phone number, email address).

Access history (access log): Contains information such as the domain name, IP address, browser, and OS of a customer accessing the website, the date and time of access, and the page(s) viewed. However, it does not contain personally identifiable information.

(2) Purposes of using cookies etc.
HOW uses cookies etc. it acquires for the following purposes.
Website maintenance and service improvement
Development and improvement of products and services

(3) Use of Google Analytics
This website uses Google Analytics, a service of Google Inc., to grasp the visit status of customers. For the mechanism of data collection and processing in Google Analytics, please check the information provided by

Google Analytics Terms of Use https://marketingplatform.google.com/about/analytics/terms/jp/
Google's privacy policy
Google Analytics opt-out add-on

9. Contact for enquiries, etc.
The above procedures, requests and any other enquiries or complaints regarding the handling of personal information are handled by the General Affairs Department of HOW.

Contact point for personal information (enquiries, complaints, disclosure procedures, etc.)
6-67 3F Kagurazaka, Shinjuku-ku, Tokyo 1620825
General Affairs Department, Foundation for Housing Warranty
Telephone number: 81-3-6280-7241
Fax: 81-3-6280-7342
The office is open from 9 am to 12 noon and from 1pm to 5.30pm on weekdays, Tokyo time.

10. Policy changes
HOW may update this privacy policy from time to time, in accordance with our internal policies, technological developments, industry practices, or applicable laws and regulations. If HOW make any changes to our privacy policy, HOW will post the revised version here, so do review it frequently.