Frequently Asked Questions

Off-market properties are not listed on REINS (Real Estate Information Network System) and are not publicly available. High-value properties (hundreds of millions to tens of billions of yen) where sellers prefer "quiet transactions" are only circulated through trusted, limited channels. Through our proprietary property information network, we provide access to these rare property opportunities.

7VIP covers off-market real estate insights in Minato-ku, sharing real stories about high-value property transactions and decision-making processes. Properties are presented as anonymous specs (overview without specific location details). If you're interested, full details are disclosed after signing a Confidentiality Agreement (CA).

No, individual buyers are also welcome. Our clients include asset management companies, real estate funds, corporations, and high-net-worth individual investors.

The statutory useful life of wooden buildings in Japan is 22 years. When you purchase a wooden apartment over 22 years old, you can depreciate the entire building cost over just 4 years using the simplified method. This is an effective tax optimization strategy for high-income individuals and corporations.

4navi.jp specializes in wooden apartments and buildings over 22 years old. We carefully select properties based on occupancy rates, yields, and location. We also offer tax accountant referral services.

Tax savings vary depending on property price, land-to-building ratio, and your income situation. For specific simulations, please contact us and we'll calculate the figures in cooperation with our partner tax accountants.

We specialize in "hard-to-sell land" that other companies have rejected. This includes leasehold land, non-rebuildable properties, unregistered inherited properties, land with old buildings, remote properties, and irregular-shaped lots (flag lots, oddly shaped parcels).

No. We are a brokerage-only firm with no inventory, so we never act as the buyer. Rainbow Land Assessment is an assessment and consultation desk; we introduce sellers to our partner agents. We select those partners on the condition that they do not use high-pressure sales tactics.

Yes. Rainbow Land Assessment offers anonymous consultation — no name, phone number, or email address required. It is used by people who are not yet ready to tell their family, and by those who have experienced high-pressure sales from real estate companies in the past.

Yes, assessments are free. Submit through our 60-second quick assessment form and we'll provide your valuation results.

Yes, we hold Tokyo Metropolitan Governor License No. (1) 112235. We are also members of the All Japan Real Estate Association and the Real Estate Guarantee Association, ensuring safe and reliable transactions.

Our representative, Takaharu Saito, transitioned to real estate after working at a condominium developer and planning and managing real estate investment seminars. He writes all articles for our three real estate web media platforms. With 40 years of engineering experience, he developed the world's first mouseover multilingual dictionary app and received the Monodzukuri Nippon Grand Award Special Prize (METI Minister Award, 2011). His paper was accepted at the JSAI National Conference 2026 'AI and Real Estate' session.

We leverage cutting-edge technology including AI to improve the efficiency and sophistication of our real estate services. With productivity that accomplishes 100 person-months of development in 3 months, we single-handedly operate specialized service sites (4navi.jp, 7tochi.jp, 7vip.tokyo).

No. We are a brokerage-only firm with no inventory. Our lean team leverages AI-powered rapid web development and focuses exclusively on high-value premium properties in Minato-ku. This high-unit-price model allows us to generate strong returns through brokerage alone, without the need for a large sales force.

In a word: integrity. We don't just look for impressive mission statements—we look for companies that demonstrate honesty in their daily dealings. Respecting exclusive agency agreements, following through on purchase offers, handling information responsibly, and never pressuring clients into rushed decisions. We partner only with firms that practice these fundamentals consistently.