| Family | Rutaceae | 
| Scientific name | Orixa japonica Thunberg | 
| Synonyms | Celastrus dilatatus Thunberg; Celastrus japonica (Thunberg) K. Koch; Celastrus japonicus (Thunberg) K. Koch; Celastrus orixa (Thunberg) Siebold & Zuccarini; Euodia ramiflora A. Gray; Glochidion vanioti H. Léveillé; Ilex orixa (Lamarck) Sprengel; Orixa racemosa Z. M. Tan; Orixa subcoriacea Z. M. Tan; Othera japonica (Thunberg) Nicholson; Othera orixa Lamarck; Sabia cavaleriei H. Léveillé; Sabia feddei H. Léveillé | 
| Common name | (Japanese common name) ko-kusagi [small kusagi (kusagi = Clerodendron trichotomum Thunberg)] | 
| (English common name) Japanese Orixa | |
| Distribution | (Japan) Honshu, Shikoku, Kyushu | 
| (Other nations) Korea, China | |
| Chromosomal number | 2n=34, 40 | 
| Description | Plants 1.5-3m. Leaves 6-10cm length. Flowers green, male flowers 4mm, flowering in April to May. Deciduous. Shrub. | 
| Reference | Orixa japonica Thunb. | 
| April 2007 at Tsukuba Botanical Garden | April 2007 at Tsukuba Botanical Garden | April 2007 at Tsukuba Botanical Garden | 
| April 2007 at Tsukuba Botanical Garden | April 2007 at Tsukuba Botanical Garden | April 2007 at Tsukuba Botanical Garden | 
| December 2007 at Tsukuba Botanical Garden | December 2007 at Tsukuba Botanical Garden |