Botanical Overview
Kabosu (Citrus sphaerocarpa) is a species in the Rutaceae family. The citrus family (Rutaceae) includes trees and shrubs with gland-dotted leaves that release aromatic oils when crushed. The flowers are typically white with four or five petals, and the fruits are often modified berries with a leathery rind. Most species produce alkaloids and limonoids with medicinal activity. Further research is needed to document the medicinal properties of this species.

General Description
It is popular in Japan, especially Ōita Prefecture, where its juice is used to improve the taste of many dishes, especially cooked fish, sashimi, and hot pot dishes.
Family Context
The Rutaceae family is primarily tropical and subtropical. Notable medicinal members include:
- Kabusu — 76 documented uses
- Petitgrain — 76 documented uses
- Rue — 54 documented uses
- Orange — 47 documented uses
Research Status
This species has not been extensively studied for medicinal properties. Additional phytochemical investigation could identify novel bioactive compounds in this plant.