Toshi Kashima was born and raised in Kobe, Japan, where he began his woodworking career apprenticing in his family's cabinetry business alongside his cousin. While craftsmanship was an early passion, life first took him down a different path when he launched a musical career and spent several years touring throughout Japan. After his musical journey and separate extensive international travel, Toshi eventually settled in Western Massachusetts to raise a family.

In 1984, Toshi joined a growing construction company in Belchertown, Massachusetts, building homes ranging from 1,200 to 1,900 square feet. Two years later, he founded Kashima Builders, launching a career that would span decades of custom home construction, renovations, and remodeling projects. Through his work, Toshi has helped create welcoming homes and commercial spaces throughout the region, including projects for local businesses such as China Gourmet, The People's Pint, and Ginger Garden.

As the housing market evolved, Toshi adapted with it. Beginning in 2009, he focused on researching and implementing energy-efficient building practices and technologies. Today, he brings extensive expertise in high-performance home construction, including HERS ratings, photovoltaic solar systems, solar hot water systems, and energy-saving ventilation technologies. His commitment to quality craftsmanship, innovation, and sustainability continues to guide his work today.