Japan Federation of Johkasou Associations

What Japan Federation of Johkasou Associations does

The Japan Federation of Johkasou Associations (全浄連, Zenjōren) is a Tokyo-based general incorporated association (一般社団法人) founded in 1977 that serves as the national umbrella body for Japan's decentralized wastewater treatment (johkasou) industry. Established in the framework of the Johkasou Law (Law No. 43 of 1983, fully enforced October 1, 1985), it coordinates policy implementation across three government ministries (Ministry of the Environment, Ministry of Health/Labour/Welfare, and Ministry of Land/Infrastructure/Transport/Tourism), local governments, and private-sector johkasou manufacturers, installers, and maintenance firms. Its counterparties are member johkasou associations nationwide, Japanese municipalities responsible for public sanitation infrastructure, and the Ministry of the Environment.

Its core technology asset is the Z-join cloud-based johkasou ledger system, operated on the LGWAN-ASP government network, which provides local governments with browser-based access to a national registry of johkasou facilities with map-linked data — supplemented by the newer Z-join.connect maintenance information collection platform. Product and service offerings also include annual training seminars (Johkasou Equipment Specialist Training at 5,000 yen per session across five locations, and Johkasou Manager Training), a Conversion Support Service advising municipalities transitioning from centralized to individual treatment, and the annual 'Johkasou no Hi' (October 1) public awareness campaign and National Johkasou Convention.

Revenue mechanics are non-commercial and non-disclosed. The federation operates as a non-profit funded through membership dues from industry member organizations, training seminar participation fees, publication sales, and — most strategically — administration of Ministry of the Environment subsidy programs (notably the FY2026 carbon dioxide emission reduction subsidy for johkasou system decarbonization, for which it was reappointed as the official execution body). The federation is not a venture-backed or PE-investable entity; it functions as a statutory industry coordinator with structural government mandate.

Name

Japan Federation of Johkasou Associations

Legal name

Japan Federation of Johkasou Associations

Website

https://zenjohren.or.jp

Company type

Private

Founded year

1977

Operating status

Operating

Short description

The Japan Federation of Johkasou Associations (全浄連) is a Tokyo-based non-profit industry association founded in 1977 that serves as the national coordinating body for Japan's decentralized wastewater treatment (johkasou) industry. It operates the Z-join cloud registry platform, runs nationwide training and awareness programs, and administers Ministry of the Environment subsidies for member associations, local governments, and industry firms.

Ownership category

akta.pro rank

Product category

Decentralized Wastewater Management Services

NAICS

Business Associations (813910), Religious, Grantmaking, Civic, Professional, and Similar Organizations (813), Administration of Air and Water Resource and Solid Waste Management Programs (92411)

SIC

Services-Membership Organizations (8600), Sanitary Services (4950)

akta.pro primary industry

Circular Economy & Resource Efficiency (BPADALAM)

akta.pro secondary industry

Health Workforce Development & Capacity-Building (HLAJAKAM)

Keywords

• Wastewater management
• Septic tank systems
• Industry association
• Decentralized sanitation
• Water environment

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Operations, Personnel, Marketing or Sales, Others

Revenue model

1. Membership fees and industry service charges: As an incorporated association (一般社団之法), the federation generates revenue primarily through membership dues collected from member organizations across Japan's johkasou industry.
2. Government subsidy administration: The federation acts as an implementation organization (執行団体) for Ministry of the Environment (環境省) subsidy programs such as the 二氧化碳排出抑制対策事業費等補助金 (carbon dioxide emission reduction subsidy), managing grant disbursement and reporting on behalf of the national government.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels4 records

Core offering

The Japan Federation of Johkasou Associations (Zenjōren) is a general incorporated association that coordinates Japan's johkasou (decentralized septic tank) industry. It serves as the national umbrella body bridging government policy, local government implementation, and private-sector operators, providing the Z-join cloud-based johkasou registry platform, professional training programs, public awareness campaigns such as Johkasou Day, and administration of Ministry of the Environment subsidy programs for johkasou decarbonization.

Product overview

Japan Federation of Johkasou Associations operates a portfolio centered on the Z-join cloud-based johkasou ledger management system, complemented by training services (Johkasou Equipment Specialist Training and Johkasou Manager Training), and awareness campaigns such as the annual Johkasou Day. The organization also provides conversion support services for municipalities transitioning from centralized sewage systems to individual treatment systems. The core product Z-join is a government-focused database system for managing johkasou registrations, while training and support services form the service layer.

Differentiator

Problem solved

Functional benefit

Brands

• Z-join: A cloud-based johkasou (septic tank) ledger system operated on the LGWAN-ASP environment, allowing browser-based access without software installation.
• Z-join.connect

Products and services

• Z-join (浄化槽台帳システム)

Quantifiable outcome

• National johkasou registration and management via Z-join system deployed to local governments nationwide
• +1 more outcomes

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Partnerships

Seven partnerships are on record, tiered core and major.

• 環境省 (Ministry of the Environment)coreStrategic or Co-development Partner · 1 October 1985The Ministry of the Environment designates the federation as its subsidy execution body (執行団体) for carbon dioxide emission reduction programs related to johkasou systems (浄化槽システムの脱炭素化推進事業). The ministry also officially endorses the federation's public awareness campaigns including the 'Johkasou no Hi' (October 1) and the national convention, and jointly coordinates policy for the johkasou industry.
• 厚生労働省 (Ministry of Health, Labour and Welfare) and 国土交通省 (Ministry of Land, Infrastructure, Transport and Tourism)coreStrategic or Co-development Partner · 1 October 1985The three-ministry (3省庁) partnership — originally 厚生省, 建設省, 環境庁 — established the 'Johkasou no Hi' (October 1) awareness day in 1987, and continues to jointly endorse the annual national johkasou convention and public campaigns coordinated by the federation.
• 公益財団法人日本環境整備教育センター (Japan Environment Sanitation Center)coreStrategic or Co-development PartnerCo-host of the annual 浄化槽設備士研究会 (Johkasou Equipment Specialist Training Seminars). The center serves as a key co-development partner for industry professional development programs, providing certification infrastructure and technical curriculum alongside the federation.
• 全国管工事業協同組合連合会 (Zenkanren — National Plumbing Industry Cooperative Federation)coreStrategic or Co-development PartnerCo-host of the annual 浄化槽設備士研究会 (Johkasou Equipment Specialist Training Seminars) alongside the federation and the Japan Environment Sanitation Center. Zenkanren represents plumbing and pipework businesses that install johkasou systems.
• 全国浄化槽推進市町村協議会 (National Council of Municipalities Promoting Johkasou)majorStrategic or Co-development PartnerListed as a related organization (関連リンク) on the federation's website. This national council of municipalities actively promotes johkasou adoption and collaborates with the federation on municipal-level implementation programs.
• (一社)浄化槽システム協会 (Johkasou System Association)majorTechnology or IntegrationListed as a related organization on the federation's website. An industry association representing johkasou system manufacturers, working with the federation on technical standards and system certification.
• (一社)全国浄化施設保守点検連合会 (Zenporen — National Federation of Johkasou Maintenance Companies)majorChannel Partner/ Reseller/ DistributorListed as a related organization. Represents businesses providing ongoing maintenance and inspection services for installed johkasou units — the downstream service channel for the industry's installed base.

Scale indicators2 records

Recent moves6 records

Expansion highlights5 records

Emerging players

• Japan Society on Water Environment (公益社団法人 日本水環境学会): A national scientific/professional society covering water environment quality - a thematic peer overlapping on water-environment protection and decentralized wastewater expertise.
• Japan Sanitation Consortium (日本サニテーションコンソーシアム): A sanitation-sector consortium listed on the federation's related-links page. Comparable as a parallel sanitation-focused collaboration network with shared stakeholder base.

Direct peers

• Zenkanren – National Plumbing Industry Cooperative Federation (全国管工事業協同組合連合会): Co-host of the Johkasou Equipment Specialist Training Seminars and the national federation representing plumbing/pipework contractors who install johkasou. Directly comparable as a national trade federation serving installers across Japan.
• Zenporen – National Federation of Johkasou Maintenance Companies (一般社団法人 全国浄化施設保守点検連合会): A related organization formally linked on the federation's site, representing johkasou maintenance/inspection businesses. Directly comparable as a parallel national industry federation operating in the same value chain.
• National Council of Municipalities Promoting Johkasou (全国浄化槽推進市町村協議会): The municipal counterpart federation for promoting johkasou adoption, listed as a related organization. Directly comparable mission (promoting johkasou at the local-government level) with overlapping stakeholder base.
• Johkasou System Association (一般社団法人 浄化槽システム協会): A related organization focused on johkasou system manufacturers and technical standards. Directly comparable as an adjacent national association governing a slice of the same johkasou value chain.
• Japan Environment Sanitation Center (公益財団法人 日本環境整備教育センター): Co-host of the federation's annual Johkasou Equipment Specialist Training Seminars and a parallel national body certifying johkasou professionals. Directly comparable as a sanitation-sector capacity-building organization with overlapping training/curriculum responsibilities.
• National Onsite Wastewater Recycling Association (NOWRA, US): The US national trade association for decentralized/onsite wastewater treatment systems - the closest international functional analogue to Zenjoren's role in Japan's johkasou industry.

Broad incumbents

• Water Environment Federation (US): The leading US-based water-quality professional association covering wastewater treatment. Comparable as a broad-incumbent analogue operating at the national level with similar training, advocacy, and standards missions.
• Japan Environmental Conservation Association (一般社団法人 日本環境保全協会): A broader environmental-services trade association with overlapping interest in sanitation infrastructure. Comparable as a wider-portfolio national association whose mission touches the same regulated space.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

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M&A

Investments

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Frequently asked questions about Japan Federation of Johkasou Associations