Ai Ryutsu is an Ibaraki company focused on prefabricated and unit-house transport, installation, assembly and dismantling, with a public unit-house sales section. It is not positioned like a catalogue homebuilder, but it is relevant for buyers or suppliers who need practical unit-house deployment and site logistics in Japan.

The company states more than 20 years in this field and lists direct phone and email contact. Buyers should confirm whether it supplies the unit, installs third-party units, or handles both.