| region | area count | specimen count | |
| Hokkaido | 22 |
110 |
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| Tohoku | 39 |
195 |
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| Kanto | 31 |
232 |
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| Hokuriku Koshinetsu | 25 |
93 |
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| Tokai | 19 |
85 |
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| Kinki | 17 |
68 |
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| Chugoku | 21 |
53 |
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| Shikoku | 10 |
35 |
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| Kyusyu | 38 |
164 |
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| Okinawa | 14 |
36 |
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| Total | 236 |
1073 |
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