Japanese large-flowered variety, sepals purple. Anthers dark purple. According to Toshio Noji, the sepals are brownish-purple with deep purple anthers.
The cultivar name means the name of a mountain (Nagano).
| Group: | Early large-flowered group |
| Raised by: | Sakata no tane Co |
| Country of origin: | Japan |
| Parentage: | Unknown |
| Further detail: | Flower diameter: 12-16cm |