エネルギー効率 でしょう
enerugii kōritsudeshō
1. Probably energy efficient.
Noun
#96067
1. Probably energy efficient.
1. energy conservation; economical use of energy
1. energy
1. public (institution)
1. efficient
1. Agency of Natural Resources and Energy
1. efficiency
1. high rate
1. it seems; I think
2. right?; don't you agree?