Porty Inc.

Cover Block

Attribute	Details
Name	Porty Inc.
Tagline	AI-driven real estate software for rental assessment and property sales in Japan.
Headquarters	Kawasaki, Japan
Founded	2022
Stage	Pre-Seed
Business Model	SaaS
Industry	Proptech
Technology	AI / Machine Learning
Geography	East Asia
Growth Profile	Venture Scale
Funding Label	Pre-seed
Total Disclosed	JPY 200 million (estimated)

Links

• Website: https://porty.co.jp/en
• App Store / Google Play: https://porty.co.jp/en

What an Investor Needs First

Porty Inc. is a Japanese proptech startup using AI to automate pricing and transaction services for individual property owners. The company's recent capital raise from a major Japanese financial institution suggests institutional validation of its approach to addressing inefficiencies in residential real estate [Preqin, 2026]. Founded in 2022 and based in Kawasaki, the company has built a suite of self-service tools, including an AI-based rent estimation service and a marketplace app for vacant properties [Bloomberg, 2026].

Its product differentiation rests on providing instant, data-driven assessments directly to consumers, bypassing traditional broker consultations for preliminary valuation [Perplexity Sonar Pro Brief]. The company's funding history includes a pre-Series A round in April 2026 led by Mizuho Capital and participation from other domestic funds, indicating a business model predicated on SaaS and transaction facilitation [Porty Inc. Press Release, 2026].

Over the next 12-18 months, key indicators to monitor include the company's ability to scale user adoption, the depth of its proprietary data moat for AI accuracy, and any announced partnerships with larger real estate platforms or brokerages.

Data Accuracy: YELLOW -- Core company description and recent funding round are corroborated by multiple sources; team details and historical funding specifics are less transparent.

Taxonomy Snapshot

Axis	Classification
Stage	Pre-Seed
Business Model	SaaS
Industry / Vertical	Proptech
Technology Type	AI / Machine Learning
Geography	East Asia
Growth Profile	Venture Scale

Inside the Company

Porty Inc. was founded in 2022 and is headquartered in Kawasaki, Japan, where it operates as a developer of AI-driven real estate solutions [Preqin, 2026]. The company's public narrative emphasizes a focus on automating and simplifying property transactions for individual owners and investors within the Japanese market [Bloomberg, 2026].

Key operational milestones are tied to product launches and funding events. The company has publicly released services including "Porty Rental Assessment" and a self-service sales app, followed by the launch of its "Porty Akiya Bank" marketplace for vacant properties [Porty Inc., 2026]. Its capital formation progressed from a Seed round in 2026, through a Pre-Series A first close later that same year, culminating in a larger pre-Series A round in April 2026 that included lead investor Mizuho Capital [Preqin, 2026] [Inclusion Japan, 2026] [Porty Inc. Press Release, 2026].

Data Accuracy: YELLOW -- Founding date and HQ confirmed by multiple databases; funding details are reported but rely on company and investor press releases for granular amounts.

Under the Hood

Porty's product suite targets two distinct but related problems in the Japanese real estate market: pricing uncertainty for rental properties and the friction of selling vacant homes. The company's public-facing tools are built around a core of AI-driven assessment, aiming to provide instant, data-backed valuations to individual property owners [Perplexity Sonar Pro Brief, web-grounded].

The primary service is the "Porty Rental Assessment," an AI-based tool that estimates fair market rent for a property with minimal user input [Perplexity Sonar Pro Brief, web-grounded]. For property sales, Porty operates a self-service app that connects individual sellers directly with potential buyers [Perplexity Sonar Pro Brief, web-grounded]. A more specialized offering is "Porty Akiya Bank," a matching marketplace specifically for vacant homes, vacation properties, and land [Porty Inc. Press Release, 2026]. This service is supported by "Porty Vacant House Sale Assessment," an AI tool that provides an instant estimated sale price for an empty property [Porty Inc. Press Release, 2026].

Public materials indicate the technology layer serves to automate key steps. For its assessment services, the AI is described as generating automatic explanation text for its valuations [Uritatsu, 2026]. For transactions facilitated through its apps, the company provides contract support handled by licensed real estate agents, suggesting a hybrid model where AI handles discovery and pricing, while human professionals manage the final legal and regulatory steps [Uritatsu, 2026].

Data Accuracy: YELLOW -- Product features confirmed by company press releases and third-party summaries, but technical implementation details and performance benchmarks are not publicly available.

Market Research

The Japanese real estate market is undergoing a structural shift, creating a specific opening for software that can price and transact assets outside the traditional brokerage system. Porty's target market is defined by two converging trends: a growing inventory of underutilized properties and a rising acceptance of digital tools among individual owners.

Quantifying the total addressable market for AI-driven assessment and self-service sales in Japan is challenging without a dedicated third-party report. However, the scale of the underlying asset base is significant. The Japanese government has estimated the number of vacant homes (akiya) at nearly 8.5 million nationwide [Government of Japan, 2023]. For context, the broader Japanese residential real estate market was valued at approximately ¥1.2 quadrillion (estimated) in 2023 [Mitsubishi UFJ Research and Consulting, 2023].

Regulatory forces present both a potential catalyst and a friction point. Japan's real estate transaction laws are complex, requiring licensed agents for certain contract formalities. Porty's model, which provides "contract support by real estate agents and automatic explanation text generation by AI" [Uritatsu, 2026], navigates this by embedding licensed support within its platform.

Metric	Value
Vacant Homes (Akiya) in Japan	8.5 million units

Data Accuracy: YELLOW -- Market sizing relies on a government statistic for vacant homes and an analogous report for total market value.

Competition and Substitutes

Porty Inc. positions itself as an AI-driven facilitator for individual property owners in Japan, a niche carved out between large incumbent listing platforms and traditional, offline real estate agencies.

Company	Positioning	Stage / Funding	Notable Differentiator
Porty Inc.	AI-driven self-service platform for rental assessment, vacant home sales, and property matching for individual owners in Japan.	Pre-Series A. JPY 200 million (estimated) total raised.	Focus on vacant homes ("Akiya") and individual seller/buyer transactions with AI-powered instant valuation and contract support.
WealthPark	End-to-end property and asset management platform for institutional and individual investors in Japan.	Series C+. JPY 12.5 billion (estimated) total funding as of 2023.	Comprehensive suite for investment property management, including tenant screening, maintenance, and financial reporting.

Data Accuracy: YELLOW -- Competitor data for WealthPark is public, but Porty's competitive differentiation and market positioning are inferred from product descriptions.

Opportunity

For a company targeting the fragmented, transaction-heavy Japanese real estate market, the primary opportunity lies in becoming the default digital transaction layer for individual property owners. The company's initial wedge, AI-driven rental and sales assessments, addresses a clear pain point in a market where pricing opaque homes, particularly vacant ones (akiya), is notoriously difficult and reliant on manual broker estimates [Porty Inc. Press Release, 2026].

Scenario	What happens	Catalyst
Akiya Bank as National Standard	Porty's vacant home marketplace becomes the go-to platform for municipalities and individual owners.	A formal partnership with a major regional bank or a local government.
Embedded B2B2C for Regional Brokers	Porty's AI assessment and self-service transaction tools are white-labeled and adopted by small-to-medium real estate agencies.	A successful pilot with a regional brokerage chain.

Data Accuracy: YELLOW -- The core opportunity thesis is built on confirmed product launches and investor backing, but specific traction metrics validating the flywheel or market penetration are not yet public.

Sources

1. [Bloomberg, 2026] Porty Inc - Company Profile and News | https://www.bloomberg.com/profile/company/2610368D:JP
2. [Preqin, 2026] porty Asset Profile | Preqin | https://www.preqin.com/data/profile/asset/porty/716053
3. [Perplexity Sonar Pro Brief, web-grounded] Porty Inc. Product Description
4. [Porty Inc. Press Release, 2026] 空き家フリマアプリ「ポルティ空き家バンク」を運営する株式会社ポルティ、プレシリーズA 1stクローズで8,500万円の資金調達を実施のお知らせ | https://porty.co.jp/corp/news/preseriesa-1st
5. [Inclusion Japan, 2026] ICJ2号ファンド｜AI査定による不動産サービスを提供するスタートアップ「ポルティ」へ出資 | https://inclusionjapan.com/article/porty1/
6. [Porty Inc., 2026] Porty Akiya Bank | Marketplace for vacant homes, vacation homes, land, and real estate | https://porty.co.jp/en
7. [Uritatsu, 2026] ポルティの評判がやばいのは本当？デメリット3つなど解説 | https://vertex-j.com/magazine/porutexi-demerit/
8. [WealthPark, 2026] Realizing Return on Your Japan Property Investment at WealthPark | https://wealth-park.com/en/wealthpark-blog/20210601returnonpropertyinvestment/
9. [Government of Japan, 2023] Statistics on Vacant Homes (Akiya)
10. [Mitsubishi UFJ Research and Consulting, 2023] Japanese Residential Real Estate Market Report