'Japanese-influenced' originates from English, specifically the compound of the adjective 'Japanese' and the past-participial adjective 'influenced', where 'Japanese' denotes 'of or relating to Japan' and 'influenced' is the past participle of 'influence' (to have an effect on).

'Japanese' developed from the name 'Japan' (itself entering English via early European forms such as Portuguese 'Japão' and Malay 'Jepang'), combined with the adjectival suffix '-ese' of Romance/Latin origin; 'influenced' comes from Latin 'influere' ('in-' + 'fluere' meaning 'to flow'), via Old French/Medieval Latin forms and Middle English 'influence' to the past participle 'influenced'.

The component 'Japanese' has long meant 'of or from Japan'; 'influence' originally carried the literal sense of 'a flowing in' (from Latin 'influere') and over time shifted to the figurative sense 'to affect or shape', which is the sense preserved in 'influenced'.