sakumiru.jp

What It Is

サクミル is a cloud-based site management / construction project management application for the Japanese construction industry, provided by 株式会社プレックス. It is positioned as a way to consolidate Excel, paper forms, whiteboards, or FileMaker-style workflows into a single system. The product emphasizes unified management “from the jobsite to business operations,” and discloses that it has been adopted by more than 3,000 companies, with over 200 new companies added each month.

Core Features and Collaboration

Its feature set covers customer management, project management, photo and file management, scheduling / process management, daily work reports, estimate management, execution budgets and cost management, invoicing / payment collection, construction ledgers, attendance management, and purchase order / procurement management. A key strength is data linkage: daily reports can be aggregated into labor and cost data, while each project can be connected with drawings, photos, quotes, billing, and progress. Management can view costs, gross profit, and project status in real time. The system supports PCs, smartphones, and tablets, allowing field staff to submit daily reports from their phones. Partner companies or part-time workers can also view the sites they are assigned to after registration. However, role-based permissions, approval workflows, audit logs, and similar controls are not clearly disclosed.

Pricing and Trial

Pricing is transparent: there is no initial setup fee, and the basic plan costs 9,800 yen per month, excluding tax, including 30 accounts and 300GB of storage. Additional accounts cost 100 yen/month each, and an extra 100GB of storage costs 700 yen/month. A 2-month free trial is available, and the text clearly states that users will not be charged automatically after the trial, reducing the cost of experimentation. Payment is mainly via direct debit from Japanese financial institutions, with bank transfer available in certain cases.

Pros and Cons

Its strengths include broad coverage of construction-industry workflows, very friendly pricing for teams of up to 30 people, practical mobile data entry from jobsites, and support options such as a dedicated representative and LINE consultation. The drawbacks are limited information on third-party integrations—only Google Maps-related usage is visible. API availability, accounting software integrations, SSO, and security/compliance certifications such as ISO/SOC are not disclosed, which may make it insufficient for large groups or companies with demanding cross-system integration requirements.

Who It’s For and Access from China

It is better suited to small and midsize construction, equipment, electrical, interior, and civil engineering companies in Japan, especially as a replacement for paper daily reports, Excel ledgers, and fragmented file management. Access from mainland China is unknown; meanwhile, the product language, contracts, payment methods, and support are all oriented toward the Japanese market. Chinese companies may want to first evaluate local construction management tools, Glodon / Mingyuanyun, or ecosystem solutions built around DingTalk and WeCom.