Within its natural range in Asia, the small Japanese cedar longhorned beetle infests a number of plants in the family Cupressaceae. These include Hinoki cypress, Sawara cypress, Japanese cedar, Cypress, and false arborvitae. Firs and pines have also been reported as hosts. Common juniper is the host plant where this insect has become established in Italy. Monterey cypress is the reported host in Spain. Infestations in North America have been found in arborvitae and eastern red cedar.
Establishment of this insect in natural forests could reduce the number of host plants (e.g. junipers, cedars, etc) in a number of forest ecosystems across North America and cause some ecological disruption. The fruits of most junipers, for example, are an important food source for birds and small mammals.
The small Japanese cedar longhorned beetle is not known to occur in Indiana.