What Storage King does

Storage King is a Japanese self-storage (trunk room) operator and property management company headquartered in Ichikawa, Chiba Prefecture, and listed on the Tokyo Stock Exchange Growth Market under securities code 2997 (IPO April 27, 2022). The company develops, operates, and manages a network of 223 self-storage stores containing over 13,000 trunk rooms, with primary density in the Tokyo metropolitan area and Okayama region, and an active nationwide rollout extending into Hokkaido, Tohoku, Chubu, Kinki, Chugoku, Shikoku, Kyushu, and Okinawa. Its facility portfolio comprises indoor climate-controlled units (floor air conditioning, surveillance cameras, entry keypads), outdoor container-type units with adjacent parking, motorcycle/vehicle boxes, and value-added formats including Steel Rack Equipped Rooms (launched July 2023) and the R9 OFFICE GARAGE co-located workspace product.

The company operates a dual-engine business model. The B2C engine rents storage units on a subscription basis to individual consumers and small businesses for personal belongings, seasonal items, documents, and inventory overflow, addressing Japan's severe residential space constraint. The B2B engine develops storage properties from land acquisition through construction and sells completed, income-producing facilities to real estate investors while retaining property management rights — a built-in flywheel that converts one-time development revenue into recurring management fees and stabilizes long-term cash flow. Customer segments span residential renters, corporate users, property owners/landlords seeking outsourced operations, and investors seeking stable rental-yield assets. The asset-light structure is reflected in headcount of 25 employees managing the national network. Storage King holds JISQ15001 privacy management certification and is led by Representative Director, President and Executive Officer Shigeru Arakawa (荒川 滋郎).

Name

Storage King

Legal name

株式会社ストレージ王

Website

https://storageoh.co.jp

Company type

Public

Founded year

2008

Operating status

Operating

Short description

Storage King is a Japanese self-storage operator and property manager running 223 stores with 13,000+ trunk rooms nationwide, serving individual consumers, businesses, property owners, and real estate investors via rental, development, and management services.

Ownership category

akta.pro rank

Product category

Self-Storage Services

NAICS

Lessors of Miniwarehouses and Self-Storage Units (53113), Other Warehousing and Storage (49319), Warehousing and Storage (4931)

SIC

Public Warehousing & Storage (4220), Real Estate Operators (No Developers) & Lessors (6510)

akta.pro primary industry

Standard/Non-Climate Self-Storage (HSAKAGAB)

akta.pro secondary industries

Self-Storage Facility Management & Operations (Third-Party Managed) (HSAKAGAI), Self-Storage Property Management (BPAJAGAM)

Keywords

• Self-storage facilities
• Trunk room rentals
• Property development
• Storage property management
• Real estate investment

Headquarters

HQ city

Ichikawa

HQ country

Japan

HQ region

Asia

Offices2 records

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

Infrastructure, Operations, Personnel, Marketing or Sales, Technology or R&D, Supply Chain

Revenue model

1. Storage Unit Rental (Subscription): Monthly subscription fees from individual and business customers renting trunk rooms. Provides clean, safe storage spaces as a subscription service, with units ranging from 0.2帖 to 8.0帖 in size.
2. Property Development and Sales: Develops storage facility sites from land acquisition through construction, then sells completed income-producing storage properties to investors. The company retains property management responsibilities after sale, creating a steady management fee stream.
3. Property Management Services: Operates and manages storage facilities for property owners and investors on a commissioned basis. Handles tenant management, maintenance, and facility operations that would otherwise be burdensome for property owners.

Go-to-market motion2 records

Distribution channels2 records

Marketing channels5 records

Core offering

Storage King develops, operates, and manages self-storage (trunk room) facilities across Japan, offering indoor climate-controlled units and outdoor container-type units for rent to individuals and businesses on monthly subscriptions. The company also develops storage properties from land acquisition through construction and sells them as income-producing real estate to investors while retaining ongoing property management contracts, combining a B2C rental subscription business with a B2B property development and management services business.

Product overview

Storage King operates a network of self-storage (trunk room) facilities across Japan, offering primarily two types of storage units: Indoor Type (屋内タイプ), which are climate-controlled building-style units with security systems, and Outdoor Type (屋外タイプ), which are container-style units with adjacent parking. The company also provides motorcycle/vehicle parking at select locations and launched Steel Rack Equipped Rooms in 2023. In addition to direct storage unit operations, Storage King provides property management services to landlords and develops trunk room properties for sale to investors. The company operates 223 stores with over 13,000 units primarily in Tokyo and Okayama, listed on the Tokyo Stock Exchange Growth Market.

Differentiator

Problem solved

Functional benefit

Products and services

• Indoor Type Storage Units (屋内タイプ) Building-integrated indoor self-storage units with floor air conditioning, security systems (entry keypad and surveillance cameras), and clean interiors in sizes from 0.2 tsubo to 6.2 tsubo. Marketed as functioning similarly to a home closet, these units are rented on monthly subscriptions to individuals and businesses.
• Outdoor Type Storage Units (屋外タイプ) Container-style outdoor storage units with parking spaces directly adjacent to the unit entrance for convenient loading and unloading, equipped with lighting and security cameras. Positioned as additional storage space complementing primary indoor storage.
• Motorcycle Box / Garage (バイクボックス／ガレージ) Indoor parking solution for motorcycles and vehicles available at select Storage King stores; indoor units can also store tools and tires alongside the vehicle, providing a domain-specialized storage format for two-wheel and four-wheel owners.
• Steel Rack Equipped Rooms (スチールラック付き部屋) Self-storage units pre-equipped with steel racks for organized storage, launched in July 2023 as a new room type offering to provide renters with ready-to-use shelving.
• R9 OFFICE GARAGE An office garage product co-located with the Storage King Fujiooka Trunk Room, combining storage units with workspace facilities for small-business and hybrid-use customers.
• Property Management Services Operation and management services for trunk room properties, handling tenant acquisition, daily operations, and maintenance on behalf of property owners and landlords on a commissioned basis. Now extended to facilities owned by other operators under outsourced operation management contracts.
• Development and Sales (開発分譲) Development of trunk room properties spanning land selection through construction management, with completed facilities sold to investors as income-producing real estate. Storage King retains property management responsibilities after sale, generating a steady management fee stream in addition to development margin.
• Individual Luggage Transport Service On-demand individual luggage transport service offered from the Nakano-Numazuka Trunk Room, launched August 9, 2023 to complement the storage rental experience.

Quantifiable outcome

• Household penetration in Japan remains below 1% compared to approximately 10% in the United States, indicating substantial market growth opportunity

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Scale indicators5 records

Recent moves9 records

Expansion highlights5 records

Direct peers

• Shunou PIT (収納PIT): Operated by Sekisui Home Techno, a subsidiary of Sekisui House; offers nationwide self-storage units and is comparable to Storage King's indoor and outdoor trunk-room rental model across Japanese metros.
• Trunk Land (トランクランド): Japanese self-storage operator backed by JR Freight group with logistics-flavored site selection; directly competes with Storage King for urban trunk-room customers and operates indoor and outdoor unit formats.
• Anshin Trunk Room (あんしんトランクルーム): Operates a nationwide Japanese trunk-room network with indoor and outdoor units; comparable peer competing for the same residential and small-business storage customers.
• Hello Storage (ハローストレージ): Operated by Happinet Corporation; a nationwide Japanese self-storage chain offering indoor container-type units, overlapping directly with Storage King's trunk-room rental offering and national expansion strategy.
• Quraz (キュラーズ): One of Japan's largest self-storage (trunk room) operators with indoor climate-controlled facilities in major urban areas; directly competes with Storage King for residential and small-business customers renting individual storage units.
• Inaba Box (イナバボックス): Operated by Inaba Manufacturing, leveraging metal fabrication expertise to provide container-style outdoor storage units; comparable to Storage King's outdoor container product line and nationwide roll-out cadence.
• Space Plus (スペースプラス): Japanese self-storage operator with indoor and container-style units; competes with Storage King in major metros and shares a similar direct-to-consumer rental and property-management hybrid model.

Broad incumbents

• Extra Space Storage: Major US self-storage REIT operating thousands of facilities; provides a public-market valuation and growth benchmark relevant to Storage King's TSE Growth Market listed profile and expansion ambitions.
• Public Storage: Largest self-storage REIT in the United States with a globally benchmarked operating model; useful as a broad incumbent reference for unit economics, REIT-style capital structure, and category leadership at scale relative to Storage King.
• CubeSmart: US self-storage REIT with third-party management platform; comparable to Storage King's hybrid own-operate-plus-third-party-management model that CubeSmart also executes at scale.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 records

Funding overview

Funding rounds

Investors

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 Storage King