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Information for Course I on More-Compact type Johkasou

Subject matter

 The ratio of certified structure type johkasou to new johkasou is increasing year by year, and currently, certified structure type johkasou accounts for 98% of newly installed johkasou in detached houses. New models are developed every year, and in Heisei 22, a johkasou with a smaller effective capacity than the conventional compact johkasou was developed.
 This johkasou is commonly known as the “more compact type johkasou”, and by reducing the capacity of the primary treatment unit in addition to the capacity of the secondary treatment unit, the entire johkasou has a smaller capacity, resulting in an anaerobic filtration. It has the same capacity as the anaerobic filter bed tank of the floor contact aeration method. In order to reduce the capacity of primary treatment equipment, new technologies have been added, such as the transfer of separated sludge and the reduction of sludge volume through aerobic digestion.
 Of the more compact type johkasou, this workshop focuses on the KTG and CF types, which have the most installed bases. The purpose of this training is to improve the skills of related engineers and improve their social credibility.

Course content

1. Class Time
 4 hours (1 day)
2. Subjects and Number of Hours
(1) Structure and function of KTG type and CF type2 hours
(2) Maintenance and management of KTG type and CF type
2 hours


  johkasou related engineers

Tuition fee

 10,000 yen

Important points to note when applying

 1. In principle, the location of the training course you applied for cannot be changed after your application has been accepted.
 2. As a general rule, tuition fees cannot be refunded once your application has been accepted.
 3. If a course is cancelled due to an accident caused by a natural disaster or other force majeure, the next course will be cancelled.
  However, we apologize for any inconvenience this may cause to applicants.
  , expenses, and other personal damages are not liable.

Download bank transfer form (for training)

○ Download the bank transfer form (for training)please use this form.
・Please fill in the necessary information in the fields such as "Requester" and "Amount".
・Please read the instructions carefully and make the transfer at a bank counter.
・After payment, please be sure to paste a copy of the "transfer receipt" in the designated field on the course application form.


(The starting time may vary depending on the venue.)

Venue and schedule


Training location
course period
Reception period
4th Gunma
Reiwa6/10/5 (Sat)
Reiwa6/8/26 (Mon) - 9/6 (Fri)
Institutions accepting application forms
Gunma Environmental Conservation Association
371-0846 Maebashi, Motosoja-cho 1120-1
Tel: 027-212-2333
Seminar venue
 Gunma Prefectural Public Corporation General Building 1st floor west training room
 371-0854 Maebashi City, Owataricho 1-10-7, Gunma Prefectural Public Corporation Building
 Tel: 027-255-1166 

Venue and schedule


Training location
course period
Reception period
2nd Miyazaki
Reiwa6/9/22 (Sun)
Reiwa6/8/13 (Tues) - 8/23 (Fri)
Institutions accepting application forms
Miyazaki Prefecture Environmental Conservation Business Federation
〒880-0856 253 Hinodecho, Miyazaki
Tel: 0985-25-7645
Seminar venue
Miyazaki Prefecture Skills Testing Center
880-8501 Miyazaki City Tachibana-dori Higashi 2-10-1
Tel: 0985-58-1511


Japan Education Center of Environmental Sanitation
130-0024 Tokyo, Sumida-ku, Kikukawa 2-23-3
Tel: 03-3635-4882

*Institutions accepting the above application forms
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