Translation guide
A portable toilet is a self-contained, movable toilet unit used when permanent facilities are unavailable. In Japanese, the most common term is 簡易トイレ, but other expressions exist depending on context.
A movable, self-contained toilet unit for outdoor events, construction sites, or emergencies.
The most common and general term for a portable toilet. Used in everyday conversation and writing.
Portable toilets were set up at the event venue.
A direct loanword from English. Commonly used in product names and technical contexts.
I rented a portable toilet.
Literally 'temporary toilet'. Often used for toilets at construction sites or disaster areas.
There is a portable toilet at the construction site.
A portable toilet that uses chemicals to break down waste, often used in RVs or boats.
A portable toilet used in emergencies when plumbing is damaged.
簡易トイレ is the most general term for any simple, movable toilet. 仮設トイレ emphasizes that it is temporarily installed, often at construction sites or events. In many contexts they overlap, but 仮設トイレ is less common for small personal portable toilets.
A portable toilet can be used outdoors too.
Temporary toilets are set up at construction sites.
I checked how to use the emergency toilet.