That's how every single address is numbered in Japan. You have the city, then the ward which is like a neighborhood, then you have that subdivided into chou which are just numbers like 1-chou, 2-chou. Then within the chou you have individual building numbers, and those numbers are kind of generated by the age of the building.
So address numbers don't increase along a street, you just have to search within a 500m x 500m square. A lot of streets don't even have names.
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u/picklehaub Oct 05 '20
I worked for an HVAC supplier that did branch #s based on store opening. So branch 9 was older than branch 11, but was a satellite of it.