| No. | Hybrid Hostas | Origin | Pod Parent | x Pollen Parent | Source | Registered |
|
1
| 'Akane' | Unknown | - | - | Watanabe, Kenji & Hawes, James & Ruh, Peter & Ruh, Jean | .2010 |
|
2
| 'Blue Kanzashi' | Unknown | - | - | Watanabe, Kenji | --NR-- |
|
3
| 'Evening Star' | Unknown | - | - | Watanabe, Kenji & Ruh, Peter | .2001 |
|
4
| 'Fujibotan' | Unknown | - | - | Watanabe, Kenji | --NR-- |
|
5
| 'Hakumuo' | Unknown | - | - | Watanabe, Kenji | --NR-- |
|
6
| 'Iwato' | Unknown | - | - | Watanabe, Kenji | --NR-- |
|
7
| 'Ko Seto' | Unknown | - | - | Watanabe, Kenji | .2002 |
|
8
| 'Ogon Dai Tokudama' | Unknown | - | - | Watanabe, Kenji | --NR-- |
|
9
| 'Otome-no-Ka' | Unknown | - | - | Watanabe, Kenji & Ruh, Peter | .2002 |
|
10
| 'Reiko' | Unknown | - | - | Watanabe, Kenji | --NR-- |
|
11
| 'Seto-no-aki' | Unknown | - | - | Watanabe, Kenji & Ruh, Peter | .2002 |
|
12
| 'Setsukei' | Unknown | - | - | Watanabe, Kenji | --NR-- |
|
13
| 'Tanayama Nishiki' | Unknown | - | - | Watanabe, Kenji | --NR-- |
|
14
| 'Tasagare Tokudama' | Unknown | - | - | Watanabe, Kenji | --NR-- |
|
15
| 'Tsugaru Komachi' | Unknown | - | - | Watanabe, Kenji | --NR-- |
|