Clean it regularly!

To restaurant owners,

A lack of cleaning may cause bad odors or encourage
proliferation of pests like cockroaches.

Clean grease traps daily① Clean the basket
once a day.

②Clean up thegrease once a day.

Installing a grease trap
is mandatory!
* Article 3-2 of the Tokyo Metropolitan Sewerage Ordinance Enforcement Regulations* Provisions related to the Building Standards Act (Public notice of the Ministry of Construction
No. 1597 of 1975)④Clean inside the trap
once every few months.

Grease trap

oilCaution: Please treat any removed grease, etc. as waste and disposeof them in the proper manner.

Contact information
Chiyoda, Chuo, Minato(Daiba not included),and Shibuya Cities

Chubu Sewerage Oﬃce Customer Service
Section, Drain System Otemachi 2-6-3, Chiyoda
City

Bunkyo, Taito,Toshima, and Arakawa
CitiesHokubu Sewerage Oﬃce Customer Service
Section, Drain System Kuramae 2-1-8, Taito City

Minato (Daiba only),
Sumida, Koto, Shinagawa (Higashi-Yashioonly), and Ota (Reiwajima only) Cities

Tobu 1st Sewerage Oﬃce Customer Service
Section, Drain System Toyo 7-1-14, Koto City

Adachi, Katsushika,
and Edogawa Cities

Shinjuku, Nakano, andSuginami Cities
Kita, Itabashi, andNerima Cities

Seibu 1st Sewerage Oﬃce Customer ServiceSection, Drain System Arai 3-37-4, Nakano City
Seibu 2nd Sewerage Oﬃce Customer ServiceSection, Drain System Ukima 4-27-1, Kita City

Shinagawa (Higashi-Yashio Nanbu Sewerage Oﬃce Customer Service
not included), Meguro, Ota Section, Drain System Yukigayaotsukamachi(Reiwajima not included), 13-26, Ota Cityand Setagaya Cities

Tobu 2nd Sewerage Oﬃce Customer ServiceSection, Drain System Kosuge 1-2-1, Katsushika
City

BUREAU OF SEWERAGE
TOKYO METROPOLITAN GOVERNMENT

令 和 5 年 度
規格表第4類登録第87号

Greasetrap

Drainage pipe

Drainage pipe

③Clean any
waste/grease
once a week.

So clean!

Next toor underthe sink○○○Restaurant

×××Restaurant

Caution: Make sure to return the inlet
cap back to its original position.

Somethingsmells!

Greasetrap
On theﬂoor
Pipes can get clogged
without a grease trap!

Sewer pipe

Smooth water ﬂow
keeps the town clean!

Grease traps can be installed during business hours
Grease traps can be installed even if the store foryour restaurant is rented
Many types of grease traps are available.
BUREAU OF SEWERAGE
TOKYO METROPOLITAN GOVERNMENT

Sewer pipe

Mr. EarthIf you don't install a grease trap,
Drainage pipes can get clogged!

What is a grease trap?
It could pollute our rivers and oceans!

Grease that did not solidify in drainage pipes will eventually solidify in sewer pipes. When wastewater is swept
away by heavy rain, it can become an "oil ball" ﬂowing
out of rainwater outfalls and polluting rivers and oceans.

A device that separates and collects grease containedin discharged water and prevents it from draining intodrainage and sewer pipes. The grease in the discharged
water that drained into the trap ﬂoats up due to its
lower density, and only discharged water with a lesser
amount of grease ﬂows into the drainage pipe.

GutterOil ballBasket

Partition③ Grease with low
density ﬂoats up

LidOutﬂow
Inﬂow⑤Wastewater freeof grease
ﬂows out<Indoor drainage pipes clogged with grease>
Grease coming from restaurants and households
solidiﬁes inside drainage pipes and sticks to the innersurface. The pipes will clog if left this way.

①Basket catches
large food waste
Rainwater outfall during clear weather

Rainwater outfall during heavy rain

Approximately 80% of all areas of Tokyo's 23 cities use a combined sewage system
where water drained from restaurants, households, and rainwater are all drained
together. In the event of heavy rain, rainwater mixed with wastewater can ﬂow intorivers and oceans.

②As the water ﬂows
slowly, the watertemperature is also
lowered

④ Residue sinks
to the bottom

Points of caution when installing a grease trap
Select a product certiﬁed by the"Nihon Soshuki Kogyokai (JapanInterceptor Industry Association)."Sample of a certiﬁcate card

A list of certiﬁed products can be found on the "Nihon Soshuki
Kogyokai (Japan Interceptor Industry Association)" website.
Wastewater

Rainwater

To the water
reclamation center

Wastewater and rainwaterﬂow through the samesewer pipe.

Clogged drainage pipes may cause wastewater tooverﬂow and may even overﬂow inside buildings. It's
extremely unsanitary and smells awful.

During heavy rain, a part of thewastewater diluted with rainwaterﬂows out into rivers and oceans.

Grease traps should only be installed by a drain systemconstruction company designated by the Tokyo Metropolitan Government.

To maximize grease trap performance
Select a grease trap with the proper capacity and install it
somewhere it can easily be cleaned.
*Such acts may be subject to legal punishment. Calculated withthe restaurant's entire area and the number of people using it.

Structure of the combined sewerage system (during heavy rain)

DO NOT dispose wastewater from restaurants and households into street inlets.

Discarding water (wastewater) from restaurants and households into street inlets meant for rainwater may cause
decay, bad smells, and attract pests, etc. In addition, in the case of a separate sewage system where wastewater andrainwater are drained into separate sewer pipes, grease, etc. contained in discharged water is drained directly intorivers and oceans. *Such acts may be subject to legal punishment.

Contact:

Find your nearest Tokyo Metropolitan Government designateddrain system construction company using the contact informationon the next page or through the Tokyo Bureau of Sewage website.

Rainwater outfall<Wastewater overﬂowing onto the sidewalk>Nihon Soshuki Kogyokai

DO NOT leave it with the partition removed.
DO NOT install any additional aeration devices.
DO NOT use grease treatment agents that break down grease
as it will drain with discharged water.
Street inlets