Columbia subject headings:
Energy conservation--Japan--Periodicals.
Energy policy--Japan--Periodicals.
Power resources--Japan--Periodicals.
Harvard subject headings:
Energy conservation--Japan--Periodicals.
Energy policy--Japan--Periodicals.
Power resources--Japan--Periodicals.
Princeton subject headings:
Energy conservation--Japan--Periodicals.
Energy consumption--Japan--Periodicals.
Energy policy--Japan--Periodicals.
Periodicals.
Power resources--Japan--Periodicals.