Leaven Nagaoka Koshoji NACREOUS: A New High-Rise Residence in Nagaoka
Leaven Nagaoka Koshoji NACREOUS is a new high-rise condominium currently under construction in the Koshoji area of Nagaoka City, Niigata Prefecture. This 15-story reinforced concrete (RC) building is situated on a spacious corner lot with roads on three sides, offering an open and comfortable living environment. The development is notable as the first condominium of 13 stories or higher to be supplied in the western Shinano River area of Nagaoka City since 1990, according to the Real Estate Economic Institute (as of April 2024).
The property is designed with a strong focus on comfort and practicality for the snowy Nagaoka climate. The site features road heating to reduce snow shoveling effort, a parking lot with a sprinkler-type snow-melting system, and snow cornice countermeasures with melting heaters in hazardous areas. The building itself is highly insulated, with thermal insulation on exterior walls and folded insulation on partition walls and ceilings to minimize the impact of outside temperatures, ensuring year-round comfort.
Residents will enjoy a comprehensive suite of shared amenities designed for an elegant and convenient lifestyle. These include an entrance approach with lush landscaping, an entrance lounge with free Wi-Fi that can double as a co-working space, a guest room available for visitor stays, and a rooftop sky terrace offering views of the renowned Nagaoka Festival Grand Fireworks Display over the Shinano River. Additional practical facilities include a trunk room for large item storage, a 24/7 parcel delivery box, an on-site garbage storage room, and a functional indoor bicycle parking area. The condominium is also pet-friendly, subject to restrictions on type, size, and number of pets.
The unit layouts range from 2LDK+S to 3LDK configurations, with private areas from 64.35 sqm to 80.14 sqm and balcony sizes from 10.45 sqm to 12.16 sqm. Each home is equipped with premium features such as the "Takara no Mizu" purified and activated water system, a high-performance "Takara no Mira Bath" with a "yuragi" bathing function, and a "Takara no Mira Bubble Shower" for skincare. Kitchens come with glass-top gas ranges featuring temperature control, and bathrooms include ventilation, heating, and drying units.
Critical agent notes have been translated and incorporated. The sales overview remarks state: "Since the specific units for the 5th sales phase are undetermined, this overview is written for the entire planned sales units (11 units) from the 5th phase onward. The number of units for sale, sale prices, and other numerical values will be announced at the time of this advertisement." Additional remarks clarify that the top aerial photo is a composite/CG processed image of the planned area shot in March 2024 and an image of the Nagaoka Festival Grand Fireworks Display, and is not an accurate representation. The light pillars indicate the site location and do not represent the building's scale or height. The view, size, and appearance of the fireworks are not guaranteed, and the festival may be cancelled in the future. Traffic regulations are implemented on the day of the festival, and the actual situation may differ. A sample payment plan is provided: For Type B (Room 202) with a planned sale price of 35,980,000 yen, with a loan of 35,980,000 yen (principal and interest equal repayment over 40 years), a 0 yen down payment, the monthly repayment would be 69,826 yen, and the bonus repayment would be 140,015 yen, based on financing conditions and interest rates as of February 2026.
The Koshoji area offers a harmonious blend of convenience and nature, situated at a comfortable distance from the bustle around Nagaoka Station. Daily life is supported by major commercial facilities like the 24-hour supermarket "Genshin Koshoji Store," "AEON Nagaoka Store," and the specialty shop complex "Riverside Senshu." The area is also a prime location for viewing the Nagaoka Festival Grand Fireworks. An interesting local fact is that Nagaoka is famously associated with fireworks, a tradition deeply rooted in post-war reconstruction and remembrance. The closest major landmark is the Shinano River, the site of the spectacular annual Nagaoka Festival Grand Fireworks Display, one of Japan's most famous pyrotechnic events.
