“S.E.M. Company Limited (SEM) provides operation and maintenance service for PV solar power plants complying with international standard. Combining the pioneered European know-how with local Japanese expert team, SEM offers a wide range of services from preventive maintenance; monitoring, report, and analysis; site inspection; consulting, plant optimization; to production enhancement. SEM guarantees system performance through Performance Ratio Guarantee and Plant Availability Guarantee, and provides revenue shortfall protection back up by insurance partner, leaving the investors worry-free with predictable incomes.”


To be the best long-term partner, delivering the best products and services to protect the customers from all operation risk


Apply the expertise in operation and maintenance to maximize performance of the PV solar power plants for customers.
Introduce to the industry field-proven products and services that satisfies market requirements.
Create new values and benefits for contractors, suppliers, and customers.
Create long-term business plan and maximize profit for all stakeholders.

Parent Company

R&L Company Limited

R&L Company Limited (“R&L”) has been in solar business in Japan since 2007. Before that, the team had worked in solar business as EPC contractor and O&M operator in Europe. With its extensive experience, R&L is the pioneer for introducing advanced and cost effective installation technology to Japanese market. R&L has completed 100 MW solar projects in Japan and 180 MW under construction.

Sungen Energy International Co,. Ltd.

Sungen Energy International Company Limited (“SGE”) has solid experience in solar project development in Thailand, Japan, India, Germany, Italy, America and China. The team offers vertical integrated services from land development, permit development, tax planning, investment structure, financial advisory, EPC management, and operation and maintenance.

Since 2012, SGE’s team has over 200 MW solar projects in completion or under construction in Japan and worldwide.

Partners – Willis Towers Watson

SEM is a qualified O&M contractor by Willis Towers Watson to provide the insurance product for Japanese projects to cover All Risks, Business Disruption, and Revenue Shortfall for at least 5 years.