About
Johkasou-STP
A single-tank purification system used to treat waste water
What is Johkasou?
Johkasou is a single-tank purification system used to treat waste water. Johkasou is a type of decentralized sewage treatment plant (STP) designed to manage waste water from homes, schools, industries, offices, etc. It treats human waste from flush toilets as well as gray water from kitchen, bathroom, laundry machines, and other domestic sources. In Japan, urban areas typically rely on public sewage systems for collective waste water treatment.
However, in areas with low population density, such as urbanization control zones or regions with fewer regulations, Johkasou offers a more affordable and practical alternative to centralized systems.
Johkasou technology can handle both black water and gray water efficiently. Its ability to provide high-quality waste water treatment at a lower cost than traditional sewage systems has made it growingly popular. This system is especially important in areas where public sewerage is unavailable, helping meet Japan’s demand for effective waste water management in non-sewer regions.
As Japan faces a declining population, Johkasou is expected to play a vital role in addressing future waste water treatment challenges. Its cost-effectiveness and functional make it a key solution for maintaining sanitation standards in diverse communities.
How to Work Johkasou?

Why Johkasou?
Johkasou, also called “package treatment plants” or “onsite waste water treatment systems,” is a great choice for cleaning waste water. Here’s why it’s so helpful:
Cost-effective
Johkasou systems are cheaper than big sewage treatment plants (STP), so they save money.
Versatility
You can use Johkasou in homes, businesses, or even remote areas where regular sewer systems don’t work.
Environmental benefits
Johkasou removes harmful pollutants from waste water, helping keep water clean and safe.
Energy efficiency
These systems use little energy, making them eco-friendly and affordable to run.
Reliability and maintenance
Johkasou systems are strong and need little maintenance. They keep working without many repairs.
Flexibility in installation
You can install Johkasou in places where sewer systems can’t go, like areas with high groundwater or small spaces.
Saves Water
Many Johkasou systems recycle water, so they help save water and reduce waste.
Controls Odor
Johkasou has special features that stop bad smells from waste water.
Quick and Easy Setup
Installing a Johkasou system takes less time than building a big sewage treatment plant (STP). You can also add more systems if needed.
Follows Rules
Johkasou meets local rules for water treatment (WTP) to protect the environment.
Helps with Old Infrastructure
In places with old or crowded sewer systems, Johkasou takes some of the load off.
Long lifespan
These systems are built to last, and with regular care, they work for many years.
Johkasou systems make waste water treatment easier, cheaper, and better for the environment. They help clean water in places where other systems might not work.
History of Johkasou - STP
Johkasou STP has played a key role in improving sanitation and managing waste water. Its journey began in Japan when flush toilets became popular between the 1950s and 1970s. As more people started using flush toilets, there was a growing need for better waste water systems.
In 1960, Japan established an Industrial Standard to define the capacity for Johkasou systems. By 1969, authorities introduced structural standards to ensure Johkasou systems could meet user needs. This led to equal usage of sewage treatment plant (STP) and Johkasou systems.
The 1980s saw a breakthrough. Johkasou became an effective solution for promoting flush toilets. In the 1970s, manufacturers developed a small-scale system called Gappei-Shori Johkasou. Over time, this system was improved and turned into a product for everyday use.
Johkasou is widely used to treat waste water from single homes and apartment buildings. Its evolution highlights its importance in making sanitation systems more efficient. With ongoing technological advancements, Johkasou supports cleaner and healthier environments, helping communities worldwide improve their quality of life.


Emergence of Waste Water Treatment Issues in Japan
During the Meiji Era (1868–1912), Japan faced severe epidemics caused by untreated sewage. To address this, a law was enacted in 1900 to improve sanitation, but it excluded proper treatment of human waste, leaving the problem unsolved. By the 1950s to 1970s, rapid economic growth brought unprecedented environmental pollution, including serious water contamination, which led to significant health problems known as “pollution diseases.
Sustainable Impact and Environmental Benefits
The Johkasou STP does more than just clean water. It helps the environment and makes things better for everyone.
- Reduces Pressure on Centralized Sewage Systems: By cleaning waste water where it’s made, Johkasou STP doesn’t put extra work on big sewage plants. This means we use less energy and make fewer harmful gases that hurt the planet.
- Saves Water: Johkasou STP helps recycle water, which is important in places where water is hard to find. It helps keep our water safe and makes sure we don’t waste it.
- Helps Communities Be Stronger: Johkasou STP lets people take care of their own waste water. This makes communities more independent and ready to face challenges like population growth and changing weather.
- Helps the Earth: Decentralized treatment systems like Johkasou STP help local areas contribute to larger global sustainability efforts. By taking responsibility for their waste water, communities are part of the solution to environmental problems.
In conclusion, Johkasou STP contributes to energy, water, and environmental conservation in addition to water purification. Additionally, it gives communities more power and authority over their own water requirements.


Indonesia Urgent Need for Wastewater Treatment
Indonesia’s government aims to cut greenhouse gas emissions and water pollution through its water management policies. Indonesia faces significant challenges when it comes to waste water treatment, which has become a growing concern due to rapid urbanization, population growth, and industrial activities.
Inadequate Sewage Infrastructure: Indonesia’s sewage treatment plants (STP) often struggle to keep up with the country’s fast-growing population and urban expansion. Many areas, especially in rural or remote regions, lack access to proper waste water treatment systems.
Water Pollution and Its Impact: Water pollution is a major issue in Indonesia. Industrial waste, agricultural runoff, and untreated domestic waste water contribute to the contamination of water sources. It also harms aquatic life, making water resources unsafe for drinking, bathing, and fishing.
Limited Awareness and Investment in Waste water Management: While there is growing awareness of the need for better waste water management, many regions in Indonesia still lack the resources and technical knowledge to improve their systems. There is also a shortage of skilled professionals to manage waste water treatment operations.
The Solution-Johkasou STP as a Decentralized Wast Water Treatment System: Johkasou STP is promising solution to Indonesia’s waste water challenges is the adoption, or decentralized waste water treatment systems. Johkasou systems are compact, efficient, and affordable, making them an ideal option for areas without access to centralized sewage treatment plants.
Why Johkasou is Important for Indonesia: The need for effective waste water treatment in Indonesia is emergency, and Johkasou systems offer to solve, sustainable solution. They help solve problems like water pollution, lack of proper infrastructure, and overloading of current sewage treatment plants (STP).
By adopting decentralized systems like Johkasou, Indonesia can protect its water resources, improve public health, and environmental sustainability.
Johkasou systems are not just another option; they are a key part of Indonesia’s future waste water management. They provide a simple and cost-effective way to deal with the increasing problems of water pollution and waste treatment.
Why Johkasou STP is a Smart Choice for Waste Water Treatment
Johkasou Sewage Treatment Plants (STP) are a great way to treat waste water. They help clean water, save resources, and make communities stronger. Here’s why Johkasou STP are a good option:
Takes Pressure Off Big Sewage Systems: Johkasou STPs treat waste water right where it is made. This means large sewage plants don’t have to work as hard. It also helps reduce energy use and keeps pollution low, which is good for the environment.
Saves Water: These systems recycle water, which is very useful in areas where water is scarce. By reusing water, Johkasou STPs help people save and use water wisely.
Helps Local Communities: With Johkasou STPs, communities can manage their own waste water. This makes them less dependent on outside systems and better prepared for changes like population growth or extreme weather.
Good for the Planet: Johkasou STPs protect rivers and lakes by cleaning waste water before it goes back into nature. They also reduce pollution, helping plants, animals, and people live in a healthier environment.
Johkasou STPs are not just water treatment systems. They save energy, protect water, and support a sustainable future.
How Does Johkasou STP Reduce Water Pollution?
Johkasou STPs help reduce water pollution by cleaning waste water before it is released. Here’s how:
- Removes Harmful Stuff: These systems take out chemicals, germs, and solid waste, so only clean water is released.
- Protects Nature: Clean water keeps rivers, lakes, and aquatic life safe.
- Reuses Water: Treated water can be used again for things like irrigation or cleaning, reducing waste.
By keeping water sources clean, Johkasou STPs make a big difference for both people and nature.
How Affordable is Johkasou STP for Waste Water Management?
Johkasou STPs are a cost-effective way to handle waste water. Here’s why they save money:
- No Need for Big Systems: Treating water on-site means there’s no need for expensive pipes or large plants.
- Uses Less Energy: The system runs efficiently, which keeps power bills low.
- Built to Last: These systems are strong and need little maintenance, saving money on repairs.
- Reuses Water: Recycling water saves money, especially in areas where water is hard to find.
Johkasou STPs are affordable, eco-friendly, and practical, making them a smart choice for managing waste water.
Why You choose Daiki Axis Indonesia?
As a subsidiary of Daiki Japan, we bring the expertise and innovation of Japanese waste water treatment technology to Indonesia. Our commitment to quality ensures that each Johkasou system meets the specific needs of the Indonesia’s environment and supports a sustainable future.
Are You Ready to Transform Your Waste Water Management?
Daiki Axis Indonesia uses Johkasou technology to offer effective and eco-friendly waste water treatment solutions. This advanced system helps tackle waste water management issues while supporting environmental sustainability and resource conservation.
Are you ready to improve your waste water management and contribute to a cleaner, more sustainable future?
In addition to standard sizes and models, any capacity can be supplied as per customer requirement Reach Out to Us Now to Experience Innovative Solutions Tailored to Your Needs. (download option to see the sizes)
Unique 13 Sales Points Of Johkasou STP













Where can Johkasou Wastewater Management System be Installed?
Apartment
Hospital
Hotel
Factories
Office
School
"Committed to a cleaner future, we turn wastewater into clean water. Protecting Indonesia’s environment, one STP at a time."
-Daiki Axis Indonesia