AI Business OS "BuildOS" for the Construction Industry Begins Pre-Registration ── Fully Automating Invoice Matching and Inventory Management for Leasing Companies with AI
Leach Inc. has started pre-registration for "BuildOS," an AI business OS for construction leasing and rental companies. This system aims to fully automate cumbersome administrative tasks such as invoice matching and inventory management using AI, significantly improving operational efficiency.
📋 Article Processing Timeline
- 📰 Published: May 11, 2026 at 19:00
- 🔍 Collected: May 11, 2026 at 10:31
- 🤖 AI Analyzed: May 12, 2026 at 04:53 (18h 21m after Collected)
Leach Inc. (Headquarters: Minato-ku, Tokyo; Representative Director: Takuya Tominaga) has begun accepting pre-registrations for "BuildOS," a business support system designed for construction leasing and rental companies. BuildOS aims to streamline tedious office tasks like invoice matching and inventory management.
BuildOS is a system where AI reads, matches, and generates reports for administrative tasks in construction leasing companies, which have traditionally relied on paper slips, Excel, FAX, and phone calls. The goal is to reduce invoice checking time from 3 days per month to a few hours, and inspection work for 10,000 returned items per month to a fraction of the time.
It is planned to be offered as a monthly cloud-based service with zero initial setup costs. The pricing is designed to be affordable for small to medium-sized leasing companies with 20 to 200 employees.
"We don't have the resources to implement a core system, but Excel ledgers and paper slips have reached their limit" ── BuildOS was born from the voices of construction leasing companies on the ground.
### Why is digitalization of administrative tasks in the construction industry not progressing?
With "i-Construction" promoted by the Ministry of Land, Infrastructure, Transport and Tourism, ICT adoption on construction sites (drone surveying, 3D design, remote construction management) is progressing year by year. However, administrative tasks such as invoice checking, recording of incoming/outgoing goods, and inventory management, which operate behind the scenes, are still handled by paper, phone, and Excel.
The reason why administrative tasks in the construction industry are difficult to systematize like in other industries lies in the unique business practices of this industry, which do not exist elsewhere. There are three main reasons:
- Reason 1: "Bulk orders" make it impossible to know the number of individual items.
In construction sites, large-scale orders such as "a set of temporary materials" or "a set of scaffolding materials" are common. However, upon return, each item must be counted and inspected one by one, creating a contradiction where the counting method differs between dispatch and return. General sales management systems cannot handle this inconsistency, and experienced personnel on site end up manually matching them.
- Reason 2: Unique rules for managing by "how many times used."
Construction leasing materials are managed not only by quantity but also by "how many more times they can be used (service life)." Simple inventory counts are insufficient; the number of uses, repair history, and scrap judgment for each item are required. Commercial inventory management software can only handle quantities, forcing reliance on veteran employees' notebooks or Excel for this aspect.
- Reason 3: The unique leasing cycle of "lend, return, repair, and lend again."
Materials circulate through a cycle of dispatch → use on site → return → inspection → repair → re-dispatch. To accurately grasp "which materials are currently at which site," multiple slips must be matched. For leasing companies with sites scattered nationwide, this matching process alone consumes an enormous amount of time.
- Reason 4: Shortage of skilled personnel and aging workforce lead to fewer "knowledgeable people."
According to the Ministry of Land, Infrastructure, Transport and Tourism's "Construction Industry Handbook," approximately 36% of construction workers are aged 55 or older, and the number of workers has decreased to about 70% of its peak. Knowledge such as "where is what" and "how many more times can this material be used," which exists only in the minds of veteran employees, is easily lost during retirement or generational change, posing a significant management risk.
- Reason 5: Dispersed bases make it difficult for headquarters to see what's happening.
Many construction leasing companies have multiple depots (material storage sites) and material centers nationwide, from which materials flow to sites. Excel ledgers and paper slips at each base are disparate, making it impossible for headquarters to see "how many of what are where" in real-time. As a result, the practice of "calling bases to confirm" for urgent lending requests still persists, leading to missed business opportunities and a breeding ground for excess inventory.
### Background of Development ── Voices from the field seen through consulting support at Rikiman
The idea for BuildOS originated from our collaboration with Rikiman Co., Ltd. (a manufacturer of construction clamping hardware / approximately 90% domestic market share), which we support as a generative AI consultant. Rikiman leases temporary materials for large construction sites from 5 bases nationwide, and administrative tasks such as tag creation, inspection certificate creation, and incoming/outgoing goods management significantly burdened their personnel and time.
As a result of introducing our generative AI consulting service, the man-hours for tag creation were reduced by approximately 90%, inspection certificate creation was automated, and incoming/outgoing records were digitized. However, we also realized that "simply replacing individual tasks with AI does not change the overall workflow of the company" ── this was both a tangible result and a challenge.
BuildOS is being developed with the aim of giving shape to "the tool that leasing companies truly wanted," as revealed through our support at Rikiman, and delivering it to the entire construction leasing industry.
In addition, our existing service "Tsugou.com" is two.
BuildOS is a system where AI reads, matches, and generates reports for administrative tasks in construction leasing companies, which have traditionally relied on paper slips, Excel, FAX, and phone calls. The goal is to reduce invoice checking time from 3 days per month to a few hours, and inspection work for 10,000 returned items per month to a fraction of the time.
It is planned to be offered as a monthly cloud-based service with zero initial setup costs. The pricing is designed to be affordable for small to medium-sized leasing companies with 20 to 200 employees.
"We don't have the resources to implement a core system, but Excel ledgers and paper slips have reached their limit" ── BuildOS was born from the voices of construction leasing companies on the ground.
### Why is digitalization of administrative tasks in the construction industry not progressing?
With "i-Construction" promoted by the Ministry of Land, Infrastructure, Transport and Tourism, ICT adoption on construction sites (drone surveying, 3D design, remote construction management) is progressing year by year. However, administrative tasks such as invoice checking, recording of incoming/outgoing goods, and inventory management, which operate behind the scenes, are still handled by paper, phone, and Excel.
The reason why administrative tasks in the construction industry are difficult to systematize like in other industries lies in the unique business practices of this industry, which do not exist elsewhere. There are three main reasons:
- Reason 1: "Bulk orders" make it impossible to know the number of individual items.
In construction sites, large-scale orders such as "a set of temporary materials" or "a set of scaffolding materials" are common. However, upon return, each item must be counted and inspected one by one, creating a contradiction where the counting method differs between dispatch and return. General sales management systems cannot handle this inconsistency, and experienced personnel on site end up manually matching them.
- Reason 2: Unique rules for managing by "how many times used."
Construction leasing materials are managed not only by quantity but also by "how many more times they can be used (service life)." Simple inventory counts are insufficient; the number of uses, repair history, and scrap judgment for each item are required. Commercial inventory management software can only handle quantities, forcing reliance on veteran employees' notebooks or Excel for this aspect.
- Reason 3: The unique leasing cycle of "lend, return, repair, and lend again."
Materials circulate through a cycle of dispatch → use on site → return → inspection → repair → re-dispatch. To accurately grasp "which materials are currently at which site," multiple slips must be matched. For leasing companies with sites scattered nationwide, this matching process alone consumes an enormous amount of time.
- Reason 4: Shortage of skilled personnel and aging workforce lead to fewer "knowledgeable people."
According to the Ministry of Land, Infrastructure, Transport and Tourism's "Construction Industry Handbook," approximately 36% of construction workers are aged 55 or older, and the number of workers has decreased to about 70% of its peak. Knowledge such as "where is what" and "how many more times can this material be used," which exists only in the minds of veteran employees, is easily lost during retirement or generational change, posing a significant management risk.
- Reason 5: Dispersed bases make it difficult for headquarters to see what's happening.
Many construction leasing companies have multiple depots (material storage sites) and material centers nationwide, from which materials flow to sites. Excel ledgers and paper slips at each base are disparate, making it impossible for headquarters to see "how many of what are where" in real-time. As a result, the practice of "calling bases to confirm" for urgent lending requests still persists, leading to missed business opportunities and a breeding ground for excess inventory.
### Background of Development ── Voices from the field seen through consulting support at Rikiman
The idea for BuildOS originated from our collaboration with Rikiman Co., Ltd. (a manufacturer of construction clamping hardware / approximately 90% domestic market share), which we support as a generative AI consultant. Rikiman leases temporary materials for large construction sites from 5 bases nationwide, and administrative tasks such as tag creation, inspection certificate creation, and incoming/outgoing goods management significantly burdened their personnel and time.
As a result of introducing our generative AI consulting service, the man-hours for tag creation were reduced by approximately 90%, inspection certificate creation was automated, and incoming/outgoing records were digitized. However, we also realized that "simply replacing individual tasks with AI does not change the overall workflow of the company" ── this was both a tangible result and a challenge.
BuildOS is being developed with the aim of giving shape to "the tool that leasing companies truly wanted," as revealed through our support at Rikiman, and delivering it to the entire construction leasing industry.
In addition, our existing service "Tsugou.com" is two.