| Family | Ericaceae |
| Scientific name | Rhododendron pentaphyllum Maximovicz var. nikoense Komatsu |
| Synonyms | Rhododendron nikoense (Komatsu) Nakai |
| Common name | (Japanese common name) aka yashio [red yashio (meaning of yashio is unknown)], akagi tutuji [Mt. Akagi tutuji (tutuji = Rhododendron plants)] |
| (English common name) none | |
| Distribution | (Japan) Honshu (west of Fukushima Prefecture, east of Hyogo Prefecture, mainly Pacific Sea side) |
| (Other nations) none | |
| Chromosomal number | unknown |
| Description | Plants 3-6m. Leaves 3-6cm length. Flowers pink 5cm, flowering in April to May. Deciduous. Shrub. |
| Reference | Rhododendron pentaphyllum Maxim. var. nikoense Komatsu |
| Method of breeding azalea (US Patent 20060294616) | |
| Note | Rhododendron pentaphyllum Maximovicz (var. pentaphyllum: Japanese common name - akebono tutuji) is not a synonym of Rhododendron pentaphyllum Maximovicz var. nikoense Komatsu. Rhododendron pentaphyllum Maximovicz (var. pentaphyllum) can be found in Honshu (west of Kinki region), Shikoku and Kyushu. |
| Endemic to Japan. |
| March 2007 at Tsukuba Botanical Garden |
March 2007 at Tsukuba Botanical Garden |
April 2007 at Nikko Botanical Garden |
| December 2007 at Tsukuba Botanical Garden |
December 2007 at Tsukuba Botanical Garden |
December 2007 at Tsukuba Botanical Garden |