Kenpei Ritsu and yoseki ritsu in Japan

In the case you look at website of real estate company in Japan, you often find the words KENPEIRITSU ( = 建蔽率 ) AND YOSEKIRITSU ( = 容積率  ).

When you purchase a real estate in Japan, you need to know these words.

Kenpei Ritsu ( = 建蔽率 )  is a kind of ratio that you can use land to build your house.
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Footprint area of building : Land area is Kenpei Ritsu ( = 建蔽率 ) .

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In the case, lot area is 100 ㎡ and Kenpeiritsu is 60 %.

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Footprint area of building should be up to 60 ㎡.

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In the case  owner of building uses 100 ㎡ with building, if fire occurs, it will easily extend to neighboring house.

kenpeiritsu drawing

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Yoseki ritsu ( =  容積率 ) is a kind of ratio that you can use to build your house.

Total floor area of building : Land area is Yoseki ritsu ( =  容積率 ) .

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In the case, lot area is 100 ㎡ and Yoseki ritsu ( =  容積率 )  is 120 %.

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Total floor area of building should be up to 120 ㎡.

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In the case  Yoseki ritsu ( =  容積率 )  is 500 %, owner of land can build a building of 500 ㎡ on land of 100 ㎡.
( It may be 5 stories building )

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It will conflict sunshine of neighboring persons.

yosekiritsu drawing

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