| Cultivar Name | Source | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Registered |
| 'Abo Komachi' | Duplicate Name | - | - | | - | Duplicate | - | - | --NR-- |
| 'Aichi' | Unknown | Medium | Dark-Green | | - | Nat-Sport | Light-Purple | August to September | --NR-- |
| 'Akabira Homare' | Unknown | Small | Med-Green | Marginal | White | Unknown | - | - | --NR-- |
| 'Akane' | Watanabe, Kenji & Hawes, James & Ruh, Peter & Jean | Medium | Dark-Green | | - | Unknown | Light-Purple | August to September | .2010 |
| 'Akebono' | Duplicate Name | - | - | | - | Duplicate | - | - | --NR-- |
| 'Akebono Tokudama' | Duplicate Name | - | - | | - | Duplicate | - | - | --NR-- |
| 'Akikaze' | Duplicate Name | - | - | | - | Duplicate | - | - | --NR-- |
| 'Akikaze Gibōshi' | Duplicate Name | - | - | | - | Duplicate | - | - | --NR-- |
| 'Alba' | Unknown | Small | Med-Green | | - | Hybrid | Pure-White | August | --NR-- |
| 'Albomarginata' H. kikutii | Duplicate Name | - | - | | - | Duplicate | - | - | --NR-- |
| 'Albomarginata' H. sieboldii | Duplicate Name | Small | Med-Green | Marginal | White | Nat-Sport | - | - | --NR-- |
| 'Alcebana Fukurin' | Unknown | Medium | Med-Green | Marginal | White | Unknown | - | - | --NR-- |
| 'Alcebana Kikurin' | Unknown | Small | Dark-Green | Marginal | White | Unknown | Light-Purple | - | --NR-- |
| 'Alcebana Kukurin' | Unknown | Miniature | Med-Green | Marginal | White | Unknown | Med-Lavender | August to September | --NR-- |
| 'Amagi Nishiki' | Sugita, Hajime | Small | Med-Green | Medial | Yellow | Unknown | Light-Purple | September | --NR-- |
| 'Amagi-kintoki' | Sugita, Hajime | Small | Yellow | Marginal | Green | Hybrid | Light-Purple | September | --NR-- |
| 'Amakazari' | Nakayama, Toyozo | Medium | Dark-Green | | - | Unknown | - | - | --NR-- |
| 'Amanogawa' | Wade, Van | Large | Med-Green | Streaked | Yellow | Unknown | - | - | --NR-- |
| 'Amanum' | Duplicate Name | - | - | | - | Duplicate | - | - | --NR-- |
| 'Amanuma' | Maekawa, Dr Fumio & Ruh, Peter | Small | Med-Green | | - | Hybrid | Light-Purple | July | .2002 |
| 'Amethyst Joy' | Sugita, Hajime & Ruh, Peter | Medium | Green | | - | Hybrid | - | July into August | .2000 |
| 'Amiga Iwa Gibōshi' | Duplicate Name | - | - | | - | Duplicate | - | - | --NR-- |
| 'Amime Tachi' | Unknown | Medium | Med-Green | Streaked | Yellow | Nat-Sport | Light-Purple | August | --NR-- |
| 'Amplissima' | Unknown | Large | Med-Green | | - | Unknown | Pale-Lavender | - | --NR-- |
| 'Andrew Jackson' | Sugita, Hajime & Ruh, Peter & Jean | Giant | Blue/Green | | - | Unknown | Near-White | June into July | .2001 |
| 'Ani Machi' | Ruh, Peter & Jean | Medium | Med-Green | Medial | Greenish White | Unknown | Light-Purple | August to September | .2002 .2018 |
| 'Ani Machi Gibōshi' | Duplicate Name | - | - | | - | Duplicate | - | - | --NR-- |
| 'Aoba Komachi' | Unknown | Small | Med-Green | | - | Nat-Sport | Light-Purple | July into August | --NR-- |
| 'Aoba Omoto Gibōshi' | Duplicate Name | - | - | | - | Duplicate | - | - | --NR-- |
| 'Aoba Tsugaru Komachi' | Unknown | - | - | | - | Unknown | - | - | --NR-- |
| 'Aochidori' | Unknown | - | - | | - | Unknown | - | - | --NR-- |
| 'Aojiku Iwa Giboshi' | Unknown | | | | | Duplicate | | | |
| 'Aojiku Tama-no-Yuki' | Unknown | | Med-Green | | | Unknown | | | --NR-- |
| 'Aoki' | Bailey, Liberty Hyde & AHS | Large | Med-Green | | - | Unknown | Pale-Lavender | July into August | .1987 |
| 'Aomori Gold' | Muroya, Kimio & Zilis, Mark | Medium | Yellow | | - | Nat-Sport | Deep-Purple | August to October | .2009 |
| 'Aomori Gold Star' | Muroya, Kimio & Zilis, Mark | Medium | Yellow | Marginal | Green | Nat-Sport | Light-Purple | August to September | .2009 |
| 'Aomori Select' | Zilis, Mark | Medium | Green | | - | Nat-Sport | Light-Purple | July into August | .2009 |
| 'Aomori Setting Sun' | Unknown | Medium | Med-Green | Marginal | Yellow | Nat-Sport | Deep-Purple | August to October | --NR-- |
| 'Aomori Sunrise' | Unknown | Large | Green | Medial | Yellow | Nat-Sport | Light-Purple | July into August | --NR-- |
| 'Aphrodite' | Maekawa, Dr Fumio, Schmid, W. & Walek, Kevin | Large | Med-Green | | - | Nat-Sport | Pure-White | August to October | .2009 |
| 'Asagiri Ōba' | Unknown | Large | Med-Green | Streaked | White | Nat-Sport | Pale-Lavender | July | --NR-- |
| 'Asahi Comet' | Kato, Kiyoshi & Zumbar, Wm | Miniature | Med-Green | Marginal | Yellow | Nat-Sport | Pale-Lavender | September | .1984 |
| 'Asahi Star' | Unknown | Small | Green | Medial | Yellow | Nat-Sport | Light-Purple | September to October | --NR-- |
| 'Asahi Sunray' | Kato, Kiyoshi & Zumbar, Wm | Small | Med-Green | Marginal | Chartreuse | Nat-Sport | Pale-Lavender | September | .1984 |
| 'Asuka' | Unknown | Large | Med-Green | | - | Unknown | Pure-White | September | --NR-- |
| 'Atsuba Gibōshi' | Duplicate Name | - | - | | - | Duplicate | - | - | --NR-- |
| 'Aurea' H. longipes | Unknown | Medium | Yellow | | - | Hybrid | Light-Purple | August to October | --NR-- |
| 'Aureocinata' | Unknown | Medium | Dark-Green | Marginal | White | Unknown | - | - | --NR-- |
| 'Aureomarginata', H montana | Maekawa, Dr Fumio & AHS | Large | Med-Green | Marginal | Yellow | Unknown | Pale-Lavender | July | .1986 |
| 'Aureomarginata', H. pulchella | Unknown | Small | Med-Green | Marginal | Yellow | Unknown | - | - | --NR-- |
| 'Aya-gasane' | Unknown | - | - | Streaked | - | Unknown | - | - | --NR-- |
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