1,940 Sqm Of Private Forest — A Luxury Retreat Hidden In Karuizawa's Nampeidai

Property Highlights

The site spans 1,940 sqm (586.85 tsubo) of freehold woodland, at an elevation of approximately 915 metres within Karuizawa’s Nampeidai — Lake New Town — enclave. Zoned as a Category I Low-Rise Exclusive Residential District, under a building coverage ratio of 20% (30% in part) and floor-area ratio of 20% (50% in part), the property sits within an ungraded city planning area that keeps density permanently low. Frontage of roughly 4 metres faces northeast onto a public road with a partial private access — a quiet, forest-shrouded approach befitting the setting.

The residence extends across 202.69 sqm (61.31 tsubo) — 138.35 sqm on the first floor, 64.34 sqm on the second — in a two-storey wood-frame structure clad in galvanized-steel siding. Originally completed in July 1995, the house underwent a complete renovation finished in July 2024, pairing its modernist black exterior with a fully reimagined interior: a 3LDK layout plus an additional lounge, a hinoki bath positioned to frame views of Mount Asama, a fireplace-anchored living space, and a private outdoor fire pit terrace set among the trees.

This is a residence built for total seclusion without sacrificing connection — a modern retreat wrapped in forest, engineered for quiet.

31,000万円. Freehold. 1,940 sqm. Fully renovated, 2024.

The Neighbourhood

Nampeidai is one of Karuizawa’s most established forested residential districts, part of the long-storied Lake New Town development that has quietly attracted Tokyo’s second-home owners for decades. The area is defined by mature woodland, low-density zoning, and a stillness that stands apart even from Karuizawa’s already tranquil character.

Karuizawa Station — with direct Hokuriku Shinkansen access to Tokyo — is approximately 14 minutes by car. The Karuizawa Ehon-no-Mori Museum (Picture Book Museum), Kazakoshi Park, and the area’s noted art museums and cafés are all within easy reach, while the immediate surroundings remain dense with untouched forest and a creek running along the property’s edge.

Mount Asama presides over the district — visible from the residence’s principal rooms — anchoring the property firmly within one of Japan’s most storied mountain retreat towns.

Why TonTon

This is the kind of asset that does not reach the open market through conventional channels. As the exclusive Japan licensee of Forbes Global Properties, TonTon operates at the precise intersection of deep local knowledge and a truly global network — giving our clients access not only to properties of this nature, but to the discretion, due diligence, and cross-border expertise that a transaction of this significance demands.

Our advisory team brings together backgrounds in international finance, Japanese property law, and cross-border transaction management — fluent at a native level in Japanese, English, Mandarin, Hindi, and Korean. From corporate structure establishment and tax advisory coordination to post-acquisition asset management, we provide end-to-end support across the full acquisition journey.

For clients whose ambitions extend beyond the visible, our private portfolio awaits.