CASE STUDY
Carelink Co., Ltd.
SeikyuGuard is a business platform that supports nursing-care billing for care providers. In a multi-layered organization of Department → Group → Facility → User, it centrally supports billing operations across several hundred sites nationwide.
Cross-file reconciliation, automated deadline operations, company-wide progress visibility, and multi-layered access control — the story of building, in-house and from scratch in 14 months, a new platform that satisfies all four axes required for nursing-care billing at once.
Carelink Co., Ltd. operates nursing-care services at several hundred sites nationwide — from home-visit care, day services, geriatric health facilities, and special nursing homes to disability welfare. In a multi-layered organization of Department → Group → Facility → User, each facility handles its daily nursing-care billing.
Nursing-care billing is normally paid two months in arrears, and when the NHIA returns a claim, payment is delayed by several more months. Large volumes of billing data must be prepared accurately for every monthly deadline, so billing accuracy directly affects management.
None of these were technology-selection problems but business requirements tied directly to billing accuracy, deadline compliance, cash flow, and organizational control. A new build from scratch required a design that “satisfies them all at once.”
Cross-file reconciliation, large-volume file processing, automated deadline operations, and multi-layered access control — we built the four domains required for nursing-care billing in-house from scratch. We ended person-dependent visual checking and moved to rule-based automated reconciliation.
Laravel
PHP
XExcel import & report output
MySQL
AWS S3
SSAML2 SSO
This foundation continuously produces business outcomes — billing accuracy, deadline compliance, and stable cash flow — rather than technical metrics.