What Mansion Market does

Mansion Market (株式会社マンションマーケット) is a Japanese real estate technology company founded in May 2014 and headquartered in Tokyo (Chuo-ku, near Tsukiji). The company operates an online portal — mansion-market.com — that serves individual buyers, sellers, and investors of used condominiums (referred to in Japan as "mansions") across all 47 prefectures of Japan. The platform provides property search, market-price assessment, free appraisal requests, property proposals from registered agents, and a fixed-fee brokerage transaction service. Representative Director and co-founder Yoshida Kosuke (吉田紘祐) leads the company, which holds a Tokyo Metropolitan Government real estate broker license (No. 106776) and operates with a headcount of 11–50 employees.

The platform is built on a proprietary database of over 115,000 mansion buildings, encompassing historical transaction prices, rental market data, and price-trend analytics powered by the company's own calculation algorithms. Search is delivered through multiple interfaces — area/station-based, map-based, brand-based, tower-specific, and Tokyo 23-ward-specific — alongside editorial guides (Living Guide / Column) and a real estate glossary. The company's central commercial proposition is a fixed brokerage fee of 498,000 yen (tax included) per mansion sale, contrasting with the Japanese industry standard of approximately 3%+60,000 yen+tax, a pricing model that delivers six- to seven-figure yen savings on high-value transactions.

Mansion Market generates revenue primarily from fixed-fee brokerage commissions on completed mansion sales and from listing/advertising services on the portal. The company has raised approximately $2.6M in disclosed venture funding across two rounds (2014 Seed, 2016 Series 2) from investors including Incubate Fund, Mizuho Capital, Robot Home, AG Capital, and Soraseed, with no subsequent funding events reported. Customer acquisition is primarily digital — SEO-optimized listing pages, content marketing, earned media in major Japanese business publications, and affiliate partnerships with comparison platforms すまいステップ and すまいValue — supported by a network of registered real estate agents who execute the underlying transactions.

Name

Mansion Market

Legal name

株式会社マンションマーケット

Website

https://mansion-market.com

Company type

Private

Founded year

2014

Operating status

Operating

Headcount range

11–50 employees

Short description

Mansion Market is a Tokyo-based Japanese online real estate portal serving individual buyers, sellers, and investors of used condominiums across all 47 prefectures. It combines a proprietary 115,000+ building database with a fixed-fee brokerage model at ¥498,000 per transaction.

Ownership category

akta.pro rank

Product category

Online Real Estate Brokerage

SIC

Real Estate Agents & Managers (For Others) (6531)

akta.pro primary industry

Traditional Residential Brokerage (Existing Homes) (BPAJAAAA)

Keywords

• Real estate portal
• Condominium brokerage
• Property search platform
• Fixed-fee brokerage
• Property valuation services

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Technology or R&D, Marketing or Sales, Operations

Revenue model

1. Fixed-Fee Brokerage Commission: Transaction-based brokerage service with a flat fee of 498,000 yen (tax included) for mansion sales, regardless of property price. This replaces traditional percentage-based commissions that could cost millions of yen for high-value properties.
2. Real Estate Portal Services: Listing and advertising services for property transactions including sales and rental listings with market price information

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

Mansion Market operates a nationwide online real estate portal for buying, selling, and searching used condominiums (mansions) in Japan, backed by a proprietary database of over 115,000 mansion buildings with historical transaction and rental pricing data. The company also provides fixed-fee brokerage services at a flat rate of ¥498,000 (tax included) per transaction, along with free property appraisal requests and consultation services through registered real estate agents.

Product overview

ManSION MARKET operates as a unified real estate portal platform for used mansion transactions, consisting of a consumer-facing marketplace (https://mansion-market.com/) and a corporate information site (https://corp.mansion-market.com/). The core platform provides nationwide mansion search functionality through multiple interfaces: area/station-based search (エリア搜索), map search (地図搜索), brand mansion search (ブランドマンション搜索), and tower mansion search (タワーマンション搜索). Supporting services include a property proposal system (物件提案), free appraisal requests (売却査定), a real estate glossary (不動産用語集), and editorial guides (暮らしのガイド・コラム). The company positions itself on transparent pricing and market transparency, offering historical transaction data and rental information alongside property listings.

Differentiator

Problem solved

Functional benefit

Products and services

• Mansion Market Consumer Platform A real estate portal platform providing used condominium purchase, sale, and price market information services with nationwide coverage across all 47 Japanese prefectures. Targeted at individual property buyers, sellers, and investors.
• Fixed-Fee Brokerage Service Flat-rate brokerage service for selling used condominiums at ¥498,000 (tax included) per transaction regardless of property sale price, replacing traditional percentage-based commissions. Includes dedicated sales consultant support from negotiation through closing.
• Property Appraisal Request Service Free property valuation service enabling condominium owners to obtain market value assessments of their properties using the company's proprietary pricing algorithms and historical transaction database.
• Property Proposal Service Consultation service allowing prospective buyers to receive property proposals from registered real estate agents for purchasing condominiums matching their criteria.

Quantifiable outcome

• Fixed brokerage fee of 498,000 yen (tax included) regardless of property price, saving over 100万 yen on high-value transactions compared to traditional 3%+60万+tax model
• +1 more outcomes

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature2 records

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• HowMa (ハウマ): Japanese AI-powered condominium valuation and transaction platform providing price estimates, market analytics, and broker matching for used condominium buyers and sellers. Closest functional peer to Mansion Market's data-driven valuation and portal-matching model, with a stronger emphasis on AI-driven appraisal.

Broad incumbents

• Yahoo!不動産 (Yahoo Japan): Real estate vertical of Yahoo Japan (LY Corporation), offering nationwide condominium and property search with deep integration into the broader Yahoo Japan ecosystem. Comparable portal functionality to Mansion Market with enormous existing traffic from Yahoo Japan's general user base.
• athome: Major Japanese real estate portal operated by AtHome, providing listings for rentals and sales of apartments, condominiums, and houses. Comparable to Mansion Market as a nationwide condominium-search destination with both B2C portal traffic and B2B agent-facing services.
• SUUMO (Recruit): Operated by Recruit, SUUMO is Japan's dominant online real estate portal covering both rentals and sales (including condominiums) across the country. It is the primary comparison point for Mansion Market's portal functionality but at vastly greater scale and with a broader portfolio including jobs, cars, and bridal listings.
• Rakuten Real Estate (楽天不動産): Real estate vertical of Rakuten Group, offering condominium and property search leveraging Rakuten's broader e-commerce and points ecosystem. Comparable portal functionality to Mansion Market with significant cross-promotion advantages from the Rakuten platform.
• LIFULL HOME'S: One of Japan's largest real estate listing portals, operated by LIFULL, covering apartments, condominiums, and houses for sale and rent across all 47 prefectures. Directly comparable to Mansion Market on portal functionality and nationwide condominium search, with much larger traffic and marketing budget.

Emerging players

• ITANDI: Proptech company offering cloud-based real estate transaction management and electronic contracting tools for brokerages and rental agencies in Japan. Comparable to Mansion Market as a Japanese proptech operating in the residential transaction value chain, but focused on B2B SaaS for agents rather than direct consumer brokerage.
• Renoveru (リノベる): Japanese proptech company combining a condominium-renovation marketplace with brokerage services for renovated/renovatable units. Comparable to Mansion Market as a tech-enabled used-condominium transaction platform, with a narrower focus on the renovation segment.
• いえいえ (ieie): Niche Japanese proptech platform focused on condominium owner communities and resale information exchange. Comparable to Mansion Market in the used-condominium space but emphasizes community and seller-side data rather than portal-driven broker transactions.
• いえらぶ (ierabu / i-LOVE): Proptech platform focused on providing digital tools for independent real estate brokerages in Japan, including CRM, listing distribution, and website building. Comparable to Mansion Market in pursuing a tech-enabled brokerage model but targets the agent side rather than the consumer side.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/mansion_market
• Facebookfacebook.com/mansionmarket

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds2 records

Investors5 records

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Mansion Market