屋上緑化における失敗事例を、個別論ではなく構造的に整理する技術解説サイトです。
A neutral technical site that analyzes rooftop greening failures from a structural perspective.

1. Position and Purpose of This Site

This site does not recommend or compare any specific products, systems, or manufacturers related to rooftop greening.
Its purpose is to organize and clearly articulate the reasons why rooftop greening fails to become established, from the perspective of the structure of decision-making.

2. Quotation and Use

The content of this site may be quoted provided that the source is clearly indicated.
However, modification of the content or use for the purpose of promoting specific products or services is not permitted.

2. Quotation and Use

The content of this site may be quoted provided that the source is clearly indicated.
However, modification of the content or use for the purpose of promoting specific products or services is not permitted.

Privacy Policy

This website provides information about the business activities of Green Planning Laboratory Inc. (hereinafter referred to as “the Company”).

Policy on the Protection of Personal Information

The Company establishes the following policy regarding the protection of personal information, builds an appropriate management system, and ensures that all employees fully recognize the importance of protecting personal information and are committed to its proper handling.

Management of Personal Information

The Company keeps customers’ personal information accurate and up to date, and takes necessary security measures—such as maintaining security systems, establishing management frameworks, and providing employee training—to prevent unauthorized access, loss, damage, falsification, or leakage of personal information. Personal information is managed with strict care.

Purpose of Use of Personal Information

When making inquiries through this website, customers may be asked to provide personal information such as their name, email address, or phone number. Such information will be used only for the purposes for which it was provided. Personal information entrusted to the Company will be used to contact customers, provide business-related information, and respond to inquiries via email or by sending relevant materials.

Prohibition of Disclosure or Provision of Personal Information to Third Parties

The Company appropriately manages personal information received from customers and will not disclose it to third parties except in the following cases:
• When the customer has given consent
• When disclosure is necessary to contractors engaged by the Company to provide services requested by the customer
• When disclosure is required by laws or regulations

Security Measures for Personal Information

The Company takes all reasonable security measures to ensure the accuracy and safety of personal information.

Access, Correction, and Deletion Requests

If a customer wishes to review, correct, or delete their own personal information, the Company will respond appropriately after confirming the identity of the requester.

Compliance with Laws and Continuous Review

The Company complies with applicable Japanese laws and other relevant regulations regarding personal information, and regularly reviews and improves this policy as necessary.

Contact Information

If you have any questions regarding the handling of personal information by the Company, please contact us at the address below.

Operator: Green Planning Laboratory Inc.
Location: Yokohama City, Kanagawa Prefecture, Japan
Contact: info@gplabo.co.jp

*Please note that responses may take some time depending on the nature of your inquiry.

4. About the Operator
Operator: Green Planning Laboratory Inc.
Location: Yokohama City, Kanagawa Prefecture, Japan
Contact: info@gplabo.co.jp
*For information about the operator’s business activities, please refer to the official website .

Overall Structure of This Site (Site Map) —An overview of the way this site organizes its core ideas —

1.Overall Structure (Home)▶

(1)The Structure Behind Sound Judgment▶
   ①What Are “Structural Causes”?▶
   ②Why We Focus on Causes of Failure Rather Than “Success Stories”▶
   ③This Site’s Position and Intended Audience▶
   ④Content Structure and Conceptual Framework▶

 (2)Structures That Lead to Failure▶
   ①How the Rooftop Environment Is Understood▶
   ②Assumptions Behind Plant Selection▶
   ③The Relationship Between Systems, Plants, and Operations▶
   ④How Warranties and Inspections Are Understood▶
   ⑤Assumptions About Aging and Renewal▶
   ⑥Where Was Failure Determined?▶

2.Intro▶
 Framing the Issue and This Site’s Position

3.Misconceptions▶
 Gaps in the Assumptions Shared in Practice

4.Terms▶
 Clarifying Terms That Can Lead to Misjudgment

5.Check▶
 Structural Points to Confirm Before Evaluation

6.AI Analysis▶
 Supplementary Organization from a Third-Party Perspective

7.About▶
 Site Operator and Scope of Responsibility