Johkasou
What is Johkasou?
A Smarter Way to Treat Water
Johkasou is a prefabricated, decentralized wastewater treatment system that treats and purifies sewage right where it’s generated — without relying on large, centralized plants.
Developed and perfected in Japan by Daiki Axis, it is engineered for efficiency, reliability, and sustainability, making it ideal for residential, commercial, and industrial use.
With millions of units installed worldwide, Johkasou has become a symbol of responsible water management and eco-friendly innovation — now bringing that legacy to Bangladesh through Daiki Axis Bangladesh.
How Johkasou Works?
Engineered for Efficiency Designed for Sustainability
Johkasou treats domestic wastewater and sewage through multiple stages of biological and physical processes inside a single, compact unit.
Separation Box
Separate solids in wastewater by gravity and prevent the agitation of the excess sludge in Sedimentation & Separation Chamber by influent.
Separation & Sedimentation Chamber
Separate solid debris or impurities from water in influent and circulated water and store these sediments in the chamber Accumulated sludge should be dislodged from the tank periodically at least once in 6-12 month.
Anaerobic Chamber
It is filled with filter materials, which separate solids and keep anaerobic microorganisms to decompose organic mater.
Moving Bed Chamber
It is filled with mesh cylindrical media, which retain aerobic microorganisms to decompose and remove organic matter from wastewater.
Sedimentation Chamber
In order to obtain clear treated water, separate the excess sludge (suspended solids, SS) by gravity. The settled sludge is constantly returned to the sedimentation & separation chamber by the airlift pump.
Disinfection Chamber
Disinfect the treated water to discharge to the river or other water bodies.
Why Johkasou?
Core Concept of Johkasou
A comprehensive approach to wastewater treatment that integrates technology, management, and environmental stewardship for sustainable communities.
Regulatory Framework
Johkasou system is regulated by the Johkasou Act, which stipulates technical standards for manufacturing, installation, and operation & maintenance including desludging procedures.
Qualified Technicians
The Act establishes a comprehensive qualification system for Johkasou-related technicians, ensuring proper installation, maintenance, and operation by certified professionals.
Performance Standards
Each Johkasou product must pass rigorous performance evaluation tests before market introduction, guaranteeing consistent treatment quality and reliability.
Sludge Management
Generated sludge is appropriately treated at night soil treatment facilities before being used as fertilizer or industrial fuel, completing the sustainable cycle.
Compact, Clean, and Future-Ready
Unlike conventional sewage systems that require large space, civil work, and complex maintenance, Johkasou offers a plug-and-play, decentralized solution with unmatched benefits:
Space-Saving Design
Compact FRP structure, ideal for urban and semi-urban areas.
Quick Installation
Pre-engineered and ready-to-use design reduces setup time dramatically.
Low Maintenance
Robust system with minimal energy and operational needs.
Eco-Friendly Operation
Enables water reuse, reduces discharge, and protects natural water bodies.
Versatile Use
Suitable for homes, apartments, factories, institutions, and resorts.
Cost effective solution
Lower infra costs; cuts transport and boosts efficiency.
Localized Treatment
Ideal for rural/urban areas without central infra; treats waste on-site, skips transport.
Water Reuse Capability
Treated water for irrigation, flushing, industry; saves freshwater.
Silent Operation
Noise-free design suits homes and businesses.
Government Approved Technology
Official Japanese Government Certification
Rigorous Quality Assurance
Every Johkasou product must pass comprehensive performance evaluation tests before entering the market. Our technology meets the highest standards set by the Japanese government for structural integrity, treatment efficiency, and environmental safety.
This certification ensures that our systems deliver consistent, reliable performance while maintaining the strictest quality and environmental standards.
Built in Bangladesh Powered by Japan
Our manufacturing facilities in Bangladesh use advanced Japanese FRP molding technology to produce high-quality Johkasou units for all scales of use. Every unit undergoes strict quality control and performance testing, ensuring long life, consistent output, and compliance with CPCB standards.
Daiki Axis is the world’s largest manufacturer of packaged STPs, with thousands of Johkasou systems produced annually for global use.
Advanced Technology Features
Cutting-edge Japanese engineering meets Bangladesh requirements
Biological Treatment Process
Advanced microorganism-based treatment effectively removes contaminants and pollutants from sewage
Multi-Stage Filtration
Comprehensive treatment through screening, settling, biological treatment, and disinfection
Remote Monitoring
IoT-enabled systems allow remote monitoring and adjustments for optimal performance
Energy Efficient
Low power consumption design with energy-saving features for cost-effective operation
Durable Construction
Built with high-quality materials to withstand Bangladesh climate conditions and ensure longevity
Regulatory Compliance
Meets all Bangladeshi wastewater treatment standards and environmental regulations
Choose the Right Solution for Your Needs
Decentralized sewage treatment systems for both homes and industries.
Traditional Septic Tank
- High Groundwater Pollution Risk: Untreated wastewater leaches into soil via drain field, contaminating aquifers.
- No Water Reuse: Effluent goes to drain field — zero recycling.
- Frequent Desludging Needed: Sludge builds up quickly; requires pumping every 1–3 years.
- Large Land Requirement: Needs big soak pit/drainfield; not feasible in urban/dense areas.
- Odor & Health Hazards: Poor sealing leads to foul smell and pathogen spread.
- Non-Compliant with Modern Norms: Does not meet CPCB/NGT treated water discharge standards.
Daiki Axis Johkasou STP
- Zero Pollution – Full Treatment: AAA process treats black + grey water to BOD <10 mg/L; safe discharge or reuse.
- 100% Water Reuse: Treated water for flushing, gardening, cooling — saves 40–50% freshwater.
- Minimal Maintenance: Desludge only every 6–12 months; no daily operator needed.
- Compact & Modular: Fits under driveway/parking; ideal for homes, hotels, factories.
- Odor-Free & Silent: FRP sealed tank; noise <50 dB, no smell except during service.
- Fully Compliant: Meets CPCB, NGT, MoEFCC, CPHEEO & Japan Johkasou Law standards.
OUR PRODUCT
Capsule Type Johkasou
Compact and efficient FRP system for domestic sewage treatment, ensuring safe and effective water management for homes and communities.
Cylindrical Type Johkasou
Heavy-duty domestic and sewage wastewater treatment system designed for higher loads and faster processing with minimal maintenance.
Ideal For : Industrial units, factories, large housing
Grease Trap
Specially designed to separate oils, fats, and grease from wastewater, protecting downstream systems and ensuring cleaner discharge.
Ideal For : Commercial kitchens, hotels, restaurants
OUR WORK IN ACTION
Across residential, commercial, and public infrastructure projects, Daiki Bangladesh is helping communities treat and reuse water responsibly — protecting resources and building a sustainable future.
Industries
Institutions
Residential
Commercial Complex
Office
Hotel
Warehouse
Farmhouse
Park
Hospital
OUR PARTNERS IN PROTECTING WATER
