Where Historic Ground Meets The Open Sky — A Jacuzzi Penthouse Above Tokyo

① Property Highlights
On the 38th and 39th floors of Osaki West City Towers, a duplex penthouse occupies a position that no future development can replicate. The living and dining space rises double-height — not the sensation of a tall building, but of living above one. On the roof terrace of the 39th floor, a private jacuzzi sits beneath an open sky that belongs entirely to you. This configuration — at this altitude, in this city — cannot be added to an existing residence. It can only be acquired.

Constructed by Shimizu and Fujita. Managed by Sumitomo Fudosan Building Service with 24-hour staffed security. Full renovation completing September 2025 — move-in ready, with new flooring, new lighting, and a fully refreshed kitchen and bathroom throughout.

2LDK + WIC. 109.14 sqm, plus a 14.26 sqm rooftop balcony. Freehold. ¥328,000,000.

History below. Infrastructure around. The open sky, and everything under it, yours alone.

② The Neighbourhood
Osaki sits at the southern edge of the Jōnan Gosan — the Five Hills of Jōnan — land that Japan’s most powerful feudal lords chose as their private ground for centuries. That instinct for elevation has never left. Today, the same hills hold Tokyo’s most quietly prestigious residential addresses, and at their foot, four rail lines converge within a three-minute walk.

Two minutes by train, Shinagawa already serves the Shinkansen to Osaka. The forthcoming Linear Maglev terminal — reducing Tokyo to Osaka to 67 minutes at 500 km/h — will anchor this address permanently at the center of Japan’s most consequential infrastructure corridor. The value trajectory here is not speculative. It is written into the land and the timetable simultaneously.

③ 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.