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Toilets and sewage services(トイレと下水道)

Last updated date:2023/4/1

Clogging of drain pipes/repair work

- The cleaning and upkeep of drain pipes on residential land is the responsibility of the land owner.
- Drain pipes rarely become blocked or damaged if they are used correctly.
- For more details, please ask your apartment building owner or caretaker.

Beware of fraudsters posing as sewage inspectors!

There have been incidents of fraudsters posing as sewage inspectors to carry out unnecessary inspections of drain pipes on residential land, and charging people unfair sums of money and pressuring them into buying pharmaceuticals or electronic devices.
If someone recommends that you have your drain pipes inspected or repaired, refuse if there is no need for such work.
If you are suspicious about a person's credentials, ask to see a form of identification that will allow you to confirm his or her company name, employee name, and contact details, such as an employee ID card, and get in touch with your ward's Public Works Office. (Inquiries in Japanese only)

Sewage charge

Anyone who uses running water at home or at work and discharges waste water into the public sewage system has their meter read once every 2 months, and is billed for the use of the sewage system.

The sewage charge is included in your water bill, so please check it on the statement you receive after your water meter has been read. If you pay your water bill through payment slips, please ensure to pay by the stated deadline.

Also, anyone who does not use running water (for example, well water) but discharges waste water into the public sewage system is still required to pay the sewage charge. In such cases, please contact the Accounting and Management Division, Environmental Planning Bureau (contact details provided below).

Sewage Charge Rates

<Example calculation>
In the event that the discharge volume (2 months) is 30 ㎥ (excluding tax)
118 yen (rate per ㎥ of 21 - 40 ㎥) x 30 ㎥ - 1,020 yen = 2,520 yen

Rates for sewage charges (2 months)
Discharge volume (2 months) Per m3 Calculation formula
0~16㎥ - 1,260 yen (basic amount)
17~20㎥ 20yen 20 yen x water volume + 940 yen
21~40㎥ 118yen 118 yen x water volume - 1,020 yen
41~60㎥ 173yen 173 yen x water volume - 3,220 yen

61~100㎥

234yen 234 yen x water volume - 6,880 yen

*These prices do not include tax.
*Please contact the Accounting and Management Division, Environmental Planning Bureau concerning units of 100m3 or more (contact details provided below).
*For more information on water rates, please see the "Water utility fees have been revised" page.

In the event you do not use the public sewage system (waste pipes, junction pipes)

If you use running water but do not discharge any waste water into the public sewage system, you may be exempt from paying the sewage charge. For more details, please contact the Accounting and Management Division, Environmental Planning Bureau (contact details provided below).

Notifications/consultations concerning septic tanks

- When installing a flush toilet, etc. in an area where there is no public sewage system, it is necessary to complete the procedures for the installation of a septic tank.
- Please submit notification in the event the manager changes due to moving house, etc., or if discontinuing use of the septic tank.
- It is the obligation of those managing the septic tank to have maintenance inspections, cleaning and legal inspections carried out on the septic tank.

Where to inquire
Content Contact details
About the clogging of drain pipes/repair work and fraudsters posing as sewage inspectors Sewer Management Division, Environmental Planning Bureau (*Inquiries in Japanese only)
Tel: 045-671-2830
Fax: 045-641-5330
Email: ks-kanrohozen@city.yokohama.jp
Sewage charge Accounting and Management Division, Environmental Planning Bureau (*Inquiries in Japanese only)
Tel: 045-671-2826
Fax: 045-663-0132
Email: ks-shiyou@city.yokohama.jp
Notifications/consultations concerning septic tanks Business Waste Management Division, Resources and Waste Recycling Bureau (*Inquiries in Japanese only)
Tel: 045-671-2547
Fax: 045-663-0125
Email: sj-jokaso@city.yokohama.jp

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