| No. | Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
|
1
| "Krossa J-5" | - | - | - | - | Duplicate | - | - | Maekawa, Dr Fumio & Krossa, Gus | --NR-- |
|
2
| 'Brevifolia' | Small | Light-Green | | - | Unknown | - | - | Maekawa, Dr Fumio | --NR-- |
|
3
| 'Hippeastrum' | Medium | Med-Green | - | - | Unknown | - | - | Maekawa, Dr Fumio | --NR-- |
|
4
| Hosta clausa clausa | Small | Med-Green | | - | Sport | Deep-Purple | - | Maekawa, Dr Fumio | --NR-- |
|
5
| Hosta clausa ensata | - | Med-Green | - | - | Sport | Light-Purple | August to September | Maekawa, Dr Fumio | --NR-- |
|
6
| Hosta clausa normalis | Large | Dark-Green | | - | Sport | Light-Purple | August | Maekawa, Dr Fumio | --NR-- |
|
7
| Hosta fluctuans parvifolia | Small | - | - | - | Sport | - | - | Maekawa, Dr Fumio | --NR-- |
|
8
| Hosta kiyosumiensis | Small | Light-Green | | - | Species | Near-White | June into July | Species from Japan by Maekawa, Dr Fumio | --NR-- |
|
9
| Hosta longipes latifolia | Medium | Dark-Green | - | - | Sport | Light-Purple | September | Maekawa, Dr Fumio | --NR-- |
|
10
| Hosta longipes viridipes | Medium | Med-Green | - | - | Sport | Light-Purple | August to September | Maekawa, Dr Fumio | --NR-- |
|
11
| Hosta longissima longifolia | Miniature | Med-Green | | - | Sport | Pale-Lavender | September | Maekawa, Dr Fumio | --NR-- |
|
12
| Hosta plantaginea stenantha | Medium | Med-Green | - | - | Sport | Pure-White | August to September | Maekawa, Dr Fumio | --NR-- |
|
13
| Hosta rectifolia australis | Medium | Light-Green | - | - | Sport | - | - | Maekawa, Dr Fumio | --NR-- |
|
14
| Hosta rectifolia pruinosa | Medium | Med-Green | - | - | Sport | Light-Purple | July into August | Maekawa, Dr Fumio | --NR-- |
|
15
| Hosta rectifolia sachalinensis | Medium | Med-Green | - | - | Sport | Light-Purple | August to September | Maekawa, Dr Fumio | --NR-- |
|
16
| Hosta sieboldii okamii | Small | Med-Green | - | - | Sport | - | - | Maekawa, Dr Fumio | --NR-- |
|
17
| Hosta sieboldii polycarpellata | Small | Med-Green | - | - | Sport | Near-White | August | Maekawa, Dr Fumio | --NR-- |
|
18
| 'Kofuki Iwa Giboshi' | Medium | Light-Green | - | - | Unknown | Light-Purple | September | Maekawa, Dr Fumio | --NR-- |
|
19
| 'Liliiflora' | Large | Med-Green | - | - | Sport | Pale-Lavender | July | Maekawa, Dr Fumio | --NR-- |
|
20
| 'Maekawa Form', H. venusta | Miniature | Med-Green | - | - | Sport | Med-Lavender | June into July | Maekawa, Dr Fumio | --NR-- |
|
21
| 'Tonoko Tachi' | Medium | Med-Green | - | - | Sport | Light-Purple | July into August | Maekawa, Dr Fumio | --NR-- |
|