Japan Off-site Architecture Association Launches Full-scale Support for Housing and Facility Development in Remote and Depopulated Areas

The Japan Off-site Architecture Association (Headquarters: Chiyoda-ku, Tokyo; Representative Director: Toshinari Nagasaka) is launching full-scale efforts to support the construction of housing and various facilities in remote islands and depopulated areas where the shortage of skilled workers is becoming increasingly severe.

As part of this initiative, the association released a video on YouTube titled "Built on the Mainland, Shipped by Boat: A Record of Ama Town Off-site Construction," which highlights a successful off-site construction case implemented in Ama Town, Shimane Prefecture.

The video illustrates the process of building the structures on the mainland, finishing them in unit form, transporting them via truck and ship to Ama Town, and assembling the units on-site to complete the building.

Video URL:
https://youtu.be/DpV4DRB5o_U

Acute Construction Labor Shortages in Remote and Depopulated Areas
In remote islands and depopulated areas, the difficulty of securing skilled workers and construction businesses within the region is increasing due to population decline and aging.
Even when there is a need to develop facilities such as housing, welfare centers, accommodations, offices, or community hubs, the following issues frequently arise:

- Shortage of local construction workers and construction systems.
- Financial burden of travel and accommodation when bringing workers from outside the region.
- High logistics costs and difficulty in scheduling due to material delivery.
- Impact of weather and transport conditions on construction schedules.
- Difficulty in securing contractors even for small-scale projects.
- Local housing and facility shortages acting as a constraint on migration and human resource retention.

Support Approach via Off-site Construction
Off-site construction is a method where a part or the majority of a building is prefabricated off-site and then assembled, joined, and finished at the construction location.
The association utilizes this technology to support housing and facility construction in these vulnerable regions.
Specifically, by manufacturing major parts of the building at production bases outside the region and transporting them as units, panels, or components, the association reduces the burden of on-site work while ensuring quality, shortening construction time, and supplementing the local construction system.

The scope of application includes not just housing, but various necessary regional facilities:
- Housing for migrants and single residents
- Staff and employee housing
- Facilities for the elderly and welfare-related institutions
- Lodging and stay facilities
- Community interaction facilities
- Office and base facilities
- Emergency housing and support bases during disasters

The association intends to support housing and facility development in a way that supplements the insufficient local construction and supply capacity, rather than competing with existing local contractors.

Overview of the Ama Town Project
The project showcased in the video is a residential facility for single people in Ama Town, Shimane Prefecture.

Location: Ama Town, Shimane Prefecture
Usage: Residential facility for single people
Scale: Two row houses, 15 units in total
Construction Method: Off-site construction using unit forms
Features: Manufactured on the mainland, maritime transport, island transport, on-site assembly

Future Prospects
The association will move forward with full-scale support for construction in remote and depopulated areas. By collaborating with local governments, local businesses, construction professionals, and related organizations, the association will examine ways to introduce off-site construction methods suited to each specific regional context.