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Toilet and Sewerage

Last update date April 1, 2023

Clogging and repair of drainage pipes

  • Cleaning and management of drainage pipes in residential lands is to be performed by the owner.
  • As long as it is used normally, it will rarely clogged or broken.
  • Ask your landlord or caretaker for apartments and apartments.

Pay attention to the Sewage Inspection Commercial Code

Inspection commercial law has been conducted in which unnecessary inspections of drainage pipes in residential lands, claiming unreasonable prices, and selling chemicals and equipment.
If you are advised to inspect or repair drain pipes, refuse if not necessary.
If you feel suspicious, check the name of the trader, the person in charge, and contact information, such as presenting your employee ID card, etc., and consult with the Public Works Office of each ward. (Japanese only)

Sewerage fee

For those who use tap water at home and offices and draining to the public sewer, we request a sewerage usage fee for each meter reading of the water meter performed once every two months.

Requests will be made at the sum of the water rate, so please check the "meter reading slip" handed at the time of the water meter reading, and "payment notice payment" should pay within the deadline .

Also, when draining to public sewerage without using tap water (wells, etc.), it is necessary to pay the sewerage usage fee, so please contact Environmental Planning Bureau Accounting and Management Division (see the following reference).

Sewerage fee calculation table

<Calculation example>
Sewerage usage fee (excluding tax) for 30m3 of emissions (2 months)
118 yen (amount per m3 of 21 to 40 m3) x 30 m3-1,020 yen = 2,520 yen

General sewage sewerage system usage fee calculation table (2 months)
Emissions (2 months) Per m3 Calculation formula
0~16㎥ - 1,260 yen (basic amount)

17~20㎥

20 yen 20 yen x water volume +940 yen
21~40㎥ 118 yen 118 yen x Water -1,020 yen
41~60㎥ 173 yen 173 yen x Water -3,220 yen
61~100㎥ 234 yen 234 yen x Water -6,880 yen

※It's the amount excluding tax.
※Please contact Environmental Planning Bureau Accounting and Management Division (see below) for the unit price of 100 m3 or more.
※Please see "Water rates have been revised" for water rates.

When public sewers (sewage pipes, combined pipes) are not used

If tap water is used and does not discharge it to the public sewer at all, it may not be eligible for sewerage usage fees. For more information, please contact Environmental Planning Bureau Accounting and Management Division (see below).

Notification and consultation of septic tanks

  • When installing flush toilets in areas where public sewers are not maintained, installation procedures for septic tanks are required.
  • Please submit registration form when manager changes due to moving or abolished septic tank.
  • Those who manage septic tanks are required to undergo maintenance inspections, septic tank cleaning, and legal inspections.
Contact information
Contents Contact information
Pay attention to the Commercial Law for Clogging and Repair of Drainage pipes

Environmental Planning Bureau Sewer Management Division (*Japanese only)

Phone: 045-671-2830

Fax: 045-641-5330

Email address: ks-kanrohozen@city.yokohama.jp

Sewerage fee

Environmental Planning Bureau Accounting and Management Division (*Japanese only)

Phone: 045-671-2826

Fax: 045-663-0132

Email address: ks-shiyou@city.yokohama.jp

Notification and consultation of septic tanks

Resources and Waste Recycling Bureau Business Waste Management Section (* Japanese only)

Phone: 045-671-2547

Fax: 045-663-0125

Email address: sj-jokaso@city.yokohama.jp


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