Shelfy

Shelfy Co., Ltd. is a construction technology company founded in June 2014 by Shun-ki Roy. The founder's personal mission is to leverage IT to systematize industries in need of innovation. Before Shelfy, Roy established JapanManga Inc. while in university and later gained experience in business planning at Pixta Inc., a stock photo platform. This background in platform businesses and a desire to tackle a challenging, legacy industry led him to the construction sector, often called the "final frontier" for the web industry in Japan.

The company's primary offering is Greenfile.work, a SaaS platform designed to digitize and streamline the creation and management of safety documents for construction sites. This service addresses a major pain point in the industry, where extensive paperwork, often done after hours, burdens site managers and workers, hindering productivity. Greenfile.work provides features like master data functions to avoid repetitive entries and guided inputs for all fields, making it accessible even to those less familiar with IT. As of July 2025, the service had over 260,000 registered companies.

Shelfy's business model for Greenfile.work is subscription-based (SaaS). The company initially started with a matching platform called "SHELFY" (later renamed "Naiken-chikドットコム") to connect property owners with interior design and construction companies directly. This platform aimed to bring transparency and efficiency to the contractor selection process. While the matching service saw significant traction, achieving over 80 billion yen in transaction value by 2021, the company's current focus is on the Greenfile.work platform.

Keywords: ConTech, SaaS, construction technology, safety document management, Greenfile.work, digital transformation, construction productivity, workflow automation, compliance software, Japanese construction, site management, project management, B2B software, Naiken-chikドットコム, Shun-ki Roy