International Seminar House – Lake Saiko

The iconic International Seminar House at Lake Saiko is an acclaimed post-modern architectural landmark, originally built circa 1990 as a private educational retreat. Conceived as a place for gathering, learning, and reflection, the residence combines bold concrete construction with expansive views and generous communal spaces.

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The property features a large seminar hall with direct Mount Fuji views, formal dining capacity for up to 40 guests, and a rooftop penthouse suite complete with an expansive wooden deck and a luxurious master bathroom. Additional amenities include two guest bathrooms and a separate ground-floor apartment with private entrance, ideal for guests, staff, or independent use.

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​​Now offered for sale as buy-reform-operate package, this is a rare opportunity to acquire and renovate a one-of-a-kind architectural property. Equally suited for conversion into a private residence, hotel, creative retreat, seminar venue, or boutique hospitality concept—set against the extraordinary backdrop of Mount Fuji.  Ask about our renovation and design teams for updating baths, kitchens, outdoor spaces etc.