Koichi Sakao is a visual artist whose practice weaves together memory, place, and community engagement. Through projects that span different regions of Japan, Sakao explores how spaces hold the stories of those who inhabit them. His work often begins with close observation of a location, its materials, and the people connected to it. By combining artistic expression with participatory methods, he creates works that are not merely displayed but experienced and shaped by others. This approach reflects a deep commitment to art as a living, relational practice that grows out of specific contexts and shared histories rather than existing in isolation.

Among Sakao's notable ongoing initiatives is the Midori no Heya Project, or Green Room Project, which reimagines interior spaces as sites of artistic intervention and community gathering. This project transforms ordinary rooms into immersive environments where visitors can engage directly with art in an intimate setting. The work blurs boundaries between gallery and everyday life, inviting participants to reconsider the spaces they occupy. By activating domestic or familiar interiors, Sakao encourages a dialogue between the artwork and its surroundings, making the experience of art more tactile, personal, and accessible to a wider audience.

Another significant body of work is the Town Memory Project, which documents and reinterprets the fading traces of local communities. Through this initiative, Sakao collects fragments of urban and rural landscapes, preserving them before they vanish due to development or the passage of time. The project often involves collaboration with residents, who contribute their own memories and found objects. These collected pieces are then assembled into installations that function as visual archives. The Town Memory Project highlights how even small, overlooked details can carry profound meaning about a community's identity and transformation.

Sakao's Niigata Water Memory Project focuses on the relationship between water and human activity in the Niigata region. This project examines how rivers, coastlines, and waterways shape local culture, agriculture, and daily life. Through site-specific research and artistic documentation, Sakao traces the flow of water as both a natural element and a carrier of collective memory. The work considers how water connects people across time, serving as a witness to changing landscapes and traditions. By drawing attention to this vital resource, the project encourages reflection on environmental stewardship and the deep ties between communities and their natural surroundings.

The Ootanokakera project represents another facet of Sakao's practice, centered on fragments and remnants that tell larger stories. The title suggests pieces or shards of something greater, and the work involves collecting, preserving, and recontextualizing objects that might otherwise be discarded. These fragments become the building blocks of installations that speak to loss, resilience, and continuity. Participants are often invited to contribute their own pieces, making the project a collaborative act of preservation. Through Ootanokakera, Sakao demonstrates how even broken or incomplete things can hold beauty and meaning when viewed through an artistic lens.