Columbia subject headings:
Handbooks and manuals.
High-efficiency toilets--Japan--Handbooks, manuals, etc.
Public toilets--Japan--Handbooks, manuals, etc.
Toilets--Japan--Handbooks, manuals, etc.
Harvard subject headings:
High-efficiency toilets--Japan.
Public toilets--Japan.
Toilets--Japan.
Princeton subject headings:
Toilets--Japan.