| japan | gifu prefecture | helwingia japonica subsp. japonica | subspecies | 1 | 0 |
| japan | ibaraki prefecture | helwingia japonica subsp. japonica | subspecies | 4 | 0 |
| japan | ibaraki prefecture | helwingia japonica var. japonica | varietas | 1 | 0 |
| japan | kagoshima prefecture | helwingia japonica subsp. japonica | subspecies | 2 | 0 |
| japan | kochi prefecture | helwingia japonica var. japonica | varietas | 10 | 0 |
| japan | kochi prefecture | helwingia japonica var. parvifolia | varietas | 13 | 0 |
| japan | kumamoto prefecture | helwingia japonica var. japonica | varietas | 1 | 0 |
| japan | kumamoto prefecture | helwingia japonica var. parvifolia | varietas | 3 | 0 |
| japan | miyazaki prefecture | helwingia japonica subsp. japonica | subspecies | 5 | 0 |
| japan | nagano prefecture | helwingia japonica subsp. japonica | subspecies | 2 | 0 |
| japan | niigata prefecture | helwingia japonica subsp. japonica | subspecies | 1 | 0 |
| japan | okayama prefecture | helwingia japonica subsp. japonica | subspecies | 2 | 0 |
| japan | saga prefecture | helwingia japonica var. parvifolia | varietas | 2 | 0 |
| japan | shimane prefecture | helwingia japonica subsp. japonica | subspecies | 2 | 0 |
| japan | shizuoka prefecture | helwingia japonica subsp. japonica | subspecies | 1 | 0 |
| japan | tochigi prefecture | helwingia japonica var. japonica | varietas | 1 | 0 |