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Divide a Primary Area Partition into 64 (8 by 8) equal parts vertically and horizontally: 

Divide a Secondary Area Partition into 100 (10 by 10) equal parts vertically and horizontally: 

Divide a Basic Grid Square into 4 (2 by 2) equal parts vertically and horizontally: 

Divide a Half Grid Square into 4 (2 by 2) equal parts vertically and horizontally: 
Primary Area Partition 
 
Secondary Area Partition (Integrated Grid Square) 
 
Basic Grid Square (Third Area Partition) 
 
Half Grid Square (Divided Grid Square) 
 
Quarter Grid Square (Divided Grid Square) 
The Primary Area Partition including Metropolitan Tokyo is: 

The screened Secondary Area Partition is: 

The screened Basic Grid Square is: 

The screened Half Grid Square is: 

The screened Quarter Grid Square is: 
Mesh code: 5339 

533923 

53392343 

533923431 

5339234314 
Extract 5339. 
Extract 533923. 
Extract 53392343. 
Extract 533923431. 

Primary Area Partition of the Country 