Not established in the wild. (Horizon scanning consensus for Gibraltar (Unknown).; Horizon scanning draft for Gibraltar version 0.1 (Unknown).; Horizon scanning draft for Gibraltar version 0.3 (Unknown).);
Major. (Horizon scanning consensus for Gibraltar (Unknown); Horizon scanning draft for Gibraltar version 0.4 (Unknown).);Major. Vining, smothering plant. (Horizon scanning draft for Gibraltar version 0.1 (Unknown).. Horizon scanning draft for Gibraltar version 0.3 (Unknown).).
Minimal. (Horizon scanning consensus for Gibraltar (Unknown); Horizon scanning draft for Gibraltar version 0.4 (Unknown).; Horizon scanning draft for Gibraltar version 0.1 (Unknown).. Horizon scanning draft for Gibraltar version 0.3 (Unknown).).
Minimal. (Horizon scanning consensus for Gibraltar (Unknown); Horizon scanning draft for Gibraltar version 0.4 (Unknown).); Major. Forestry weed (CABI) "L. japonica affects forestry operations in North America by interfering with site preparation and by occupying inter-tree spaces in forests managed by selecting individual trees." (Horizon scanning draft for Gibraltar version 0.1 (Unknown).. Horizon scanning draft for Gibraltar version 0.3 (Unknown).).
Horizon scanning consensus for Gibraltar (Unknown).; Horizon scanning draft for Gibraltar version 0.1 (Unknown).; Horizon scanning draft for Gibraltar version 0.3 (Unknown).; Horizon scanning draft for Gibraltar version 0.4 (Unknown).;