What Kase Group does

Kase Group (株式会社加瀬倉庫 / Kase Group Co., Ltd.) is a privately held Japanese real estate management and utilization company founded on April 25, 1978, headquartered in Shin-Yokohama, Kanagawa Prefecture. The company operates across roughly 1,700 rental storage unit locations (trunk rooms, container rental boxes, and garage storage) nationwide under the "Kase no Trunk Room" and "Kase no Rental Box" brands, supported by an owned-property portfolio of buildings, land, and warehouses across the Greater Tokyo area (Tokyo, Kanagawa, Chiba, Saitama). Adjacent service lines include sublease management (1,900+ cases over 30+ years), store development (760+ projects), coin parking, billboard advertising on owned container yards and building facades, meeting room and event hall rentals, simulation golf, rental offices, used housing sales, container sales, and a December 2025-launched minpaku short-term accommodation business operated with Osierete Co., Ltd.

The company's technology is built around a website-based service platform and booking system serving both consumer-facing rental transactions (storage, meeting rooms, billboards) and B2B property owner onboarding, with multiple branded web properties (kase3535.com, kaigi.kasegroup.co.jp, kanban.kasegroup.co.jp). Distribution combines direct sales to property owners for B2B sublease and store development services with self-serve web platforms and physical walk-in locations for consumer-facing rentals, plus an inside sales/call center operation. Kase Group was acquired by WSI (WorkSite International) in February 2024 and rebranded from ShippingTree to Kase on March 12, 2025; it operates through wholly-owned subsidiaries including Kase Real Estate Utilization, Kase Store Development, Kase Holdings, and the recently acquired Magic Hand Group (handyman and maintenance services). Leadership is held by Representative Directors Mitaka Akira (CEO of Kase Group Co., Ltd.) and Tanima Hiroshi (CEO of Kase Real Estate Utilization and Kase Holdings).

Name

Kase Group

Legal name

株式会社加瀬倉庫 (Kase Group Co., Ltd.)

Website

https://kasegroup.co.jp

Company type

Private

Founded year

1978

Operating status

Operating

Headcount range

1–10 employees

Short description

Kase Group (加瀬グループ) is a Yokohama-based Japanese real estate utilization company operating ~1,700 rental storage locations and complementary property services (sublease, billboards, meeting rooms, minpaku) across the Greater Tokyo area for individual consumers and property owners.

Ownership category

akta.pro rank

Headquarters

HQ city

Yokohama-shi

HQ country

Japan

HQ region

Asia

Offices4 records

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

Operations, Infrastructure, Personnel, Marketing or Sales, Supply Chain

Revenue model

1. Sublease / Property Management (サブリース): Kase Group leases properties from owners en masse and subleases them, managing the entire operation. With over 30 years of experience and 1,900+ cases, the company maximizes owner asset utilization through optimal proposals based on location and area needs.
2. Storage Unit Rentals (トランクルーム・レンタルボックス): Rental of trunk rooms, container storage, and garage storage spaces to individuals and businesses. Approximately 1,700 locations nationwide.
3. Meeting Room / Event Hall Rentals (会議室): Hourly rental of meeting rooms and event halls in Tokyo, Kanagawa, and Chiba, with facilities for conferences, seminars, and parties.
4. Billboard / Outdoor Advertising (貸し看板): Renting billboard and outdoor advertising space on company-owned container yards and building facades along major roads in the Greater Tokyo area.
5. Parking Operations (コインパーキング): Coin-operated parking management with combined offerings such as rental box and motorcycle parking to diversify risk.
6. Container Sales: Sale of new and used containers for storage, combined with setup and installation services.
7. Store/Retail Space Development (店舗開発): Connecting property owners seeking to utilize their land/buildings with companies looking for retail space. 760+ store development projects completed.
8. Used Housing Sales (中古マンション・戸建販売): Purchase of properties in the Tokyo metropolitan area, renovation, and resale as used housing.
9. Short-term Accommodation / Minpaku (民泊): Minpaku (short-term rental) operations started in December 2025 targeting inbound tourism and mid-to-long-term stay demand.

Pricing tiers

Go-to-market motion1 record

Distribution channels4 records

Marketing channels8 records

Core offering

Kase Group provides real estate asset utilization services in Japan, with a core offering of rental storage (trunk rooms and container rental boxes at ~1,700 nationwide locations) for individuals and businesses. The group complements this with meeting room and event hall rentals, billboard advertising on owned buildings and container yards, subleasing and store development matching services for property owners, coin parking, used housing resale, container and partition sales, indoor simulation golf, filming locations, and short-term minpaku accommodation.

Product overview

Kase Group operates a diversified real estate and logistics platform with a portfolio of complementary products and services. The core offering centers on storage solutions including trunk rooms (加瀬のトランクルーム) with 1,700+ nationwide locations and rental boxes (加瀬のレンタルボックス) using company-owned containers. Supporting this are workspace solutions: meeting rooms (加瀬の貸し会議室), rental offices, and event halls across Tokyo-Kanagawa-Chiba. The company monetizes building facades and land through billboard advertising (加瀬のちり看板) along major Tokyo-area roads. Diversified services include property management, subleasing, store development, coin parking, filming locations, simulation golf, and senior housing. Recent expansion includes a US fulfillment center (2026) and domestic minpaku hospitality (2025).

Differentiator

Problem solved

Functional benefit

Brands

• Kase no Trunk Room (加瀬のトランクルーム): Rental storage/trunk room service with locations nationwide, offering indoor partitioned units and outdoor container boxes for personal and business storage.
• Kase no Rental Box (加瀬のレンタルボックス)
• Kase no Kashi Kandaban (加瀬の貸し看板)
• Kase no Powder Lounge (加瀬のパウダーラウンジ)
• Kase no Simulation Golf (加瀬のシミュレーション 골프)
• Kase Rental Office (加瀬のレンタルオフィス)
• Kase Rental Meeting Rooms (加瀬の貸し会議室)
• Kase Mini Kanban (加瀬のミニ看板)

Products and services

• Kase's Trunk Room (加瀬のトランクルーム) Indoor storage units partitioned within buildings, offering flexible storage space for personal and business use across approximately 1,700 locations nationwide in Japan.
• Kase's Rental Box (加瀬のレンタルボックス) Outdoor container storage units for rent, used as warehouse space or storage for materials and equipment, with approximately 1,700 locations nationwide.
• Kase's Rental Meeting Rooms (加瀬の貸し会議室) Hourly rental of meeting rooms, event halls, and multi-purpose spaces across Tokyo, Kanagawa, and Chiba, with equipment including WiFi and projectors.
• Kase's Rental Billboards (加瀬の貸し看板) Large roadside billboard advertising spaces on company-owned container yards and building facades along major arterial roads in the Greater Tokyo area.
• Subleasing (サブリース) Comprehensive property leasing service where Kase Group leases properties from owners en masse and manages them in various forms, leveraging 30+ years of experience and 1,900+ cases.
• Store Development (店舗開発) Service that bridges property owners seeking to utilize land or buildings with retail tenants seeking storefront locations, with 760+ completed store development projects.
• Coin Parking (コインパーキング) Coin-operated parking services utilizing owned land with flexible conversion options, including combination with rental box or motorcycle parking businesses.
• Used Housing Sales (中古マンション・戸建販売) Purchase of resale properties in the Tokyo metropolitan area, renovation, and resale as renovated used housing at more affordable prices than new builds.
• Container Sales (コンテナ販売) Sale of new and used storage containers for business and personal use, with various accessories and types available.
• Partition Sales (パーティション販売) Direct sale of high-quality partitions developed from trunk room operations, with full support from installation through business launch, without intermediary distributors.
• Rental Offices (レンタルオフィス) Rental office spaces utilizing vacant floors and spaces in company-owned buildings, supporting entrepreneurs and remote workers with private work rooms available 24/7.
• Location Rental / Filming Locations (ロケ地の提供) Filming location services providing access to company-owned buildings, container yards, and diverse landscapes for dramas, movies, commercials, and music videos.
• Transportation Services (運送サービス) Container transportation and installation services, handling everything from painting to delivery and setup of company-sold containers.
• Simulation Golf (シミュレーションゴルフ) Indoor golf practice facility equipped with the latest golf simulators, utilizing company-owned vacant spaces.
• Kase's Powder Lounge (加瀬のパウダーラウンジ) Female-only makeup and changing space facility near Shin-Yokohama area venues, featuring VIP rooms with ring lights, vanity mirrors, and ReFa hair irons for SNS content creation.
• Rental Housing (賃貸住宅) Rental property management and operations centered in Yokohama and Kawasaki, including tenant recruitment and vacancy solutions, plus senior-friendly housing options.
• Minpaku / Short-Term Accommodation (民泊事業) Short-term rental accommodation business targeting inbound tourism and medium-to-long-term stays, launched December 2025 at Plaza Tower Higashi-Shinjuku.
• Self-Owned Building Management (自社ビル管理) Management and utilization of company-owned buildings in Tokyo's three prefectures, including conversion to trunk rooms, rental meeting rooms, and rental offices.
• Self-Owned Land and Warehouses (自社土地・倉庫) Commercial rental properties including company-owned land and warehouses primarily in the Tokyo metropolitan area, managed by specialized staff.
• Senior Facilities (高齢者施設) Rental housing options designed for elderly residents who may face difficulties with standard rental applications due to age or income constraints.

Quantifiable outcome

• 1,900+ sublease cases handled over 30+ years
• +2 more outcomes

Named customers1 record

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

One partnership is on record.

• 株式会社オシエテ (Osierete Co., Ltd.)minorStrategic or Co-development Partner · 1 December 2025Partnership for minpaku (short-term accommodation) business launched December 2025 at Plazs Tower Higashi-Shinjuku. Osierete provides inbound-oriented accommodation operations and multilingual tourism guide services. Kase provides the real estate/property for the minpaku units.

Scale indicators6 records

Recent moves10 records

Expansion highlights6 records

Emerging players

• Airbnb Japan: Global short-term rental marketplace whose Japan supply base competes with Kase's minpaku business launched December 2025. Comparable on the hospitality/STR side of Kase's portfolio, though Airbnb is a marketplace rather than an operator.
• ecbo (\u30a8\u30af\u30dc / ecbo cloak): Japan-focused platform that connects underused spaces (cafes, lockers, shops) with consumers needing short-term luggage and item storage. Comparable as a storage-as-a-service alternative in Japan, though asset-light and platform-based rather than Kase's owned-asset model.

Broad incumbents

• Mitsubishi Estate (\u4e09\u5d6b\u5730\u6240): Premier Japanese real estate developer and building operator with extensive office, retail, and mixed-use holdings in Tokyo. Comparable as a major Tokyo real estate operator with owned-asset strategy, though at far larger scale and with different tenant mix.
• Sumitomo Realty & Development (\u4f4f\u53cb\u4e0d\u52d5\u7523): One of Japan's largest real estate developers and rental housing operators with nationwide multifamily, office, and storage-adjacent offerings. Overlaps with Kase on residential rental management and large-scale Japanese real estate operations.
• Nomura Real Estate Solutions (\u91ce\u6751\u4e0d\u52d5\u7523\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u30ba): Subsidiary of Nomura Real Estate Holdings offering property management, brokerage, and used housing resale (Mitsukoshi no Sumai). Comparable on used housing resale and property management service lines that overlap with Kase's operations.
• Tokyu Land Holdings (\u6771\u6025\u4e0d\u52d5\u7523\u30db\u30fc\u30eb\u30c7\u30a3\u30f3\u30b0\u30b9): Major Japanese real estate group with residential, office, retail, and hospitality assets across Tokyo. Operates real estate utilization strategies including owned-asset leasing and branded rentals, broadly comparable to Kase's diversified real estate model.

Direct peers

• Hello Storage / Areaquest (\u30cf\u30ed\u30fc\u30b9\u30c8\u30ec\u30fc\u30b8): Operates Japan's largest self-storage brand 'Hello Storage' with thousands of container and indoor units nationwide. The most direct head-to-head competitor for Kase's trunk room and rental box franchise in the Japanese self-storage market.
• Space Plus (\u30b9\u30da\u30fc\u30b9\u30d7\u30e9\u30b9): Japan-based self-storage operator focused on indoor and container-based trunk rooms, serving both consumer and business customers. Directly comparable on storage product type, target customer, and urban footprint.
• Shoei Corporation (\u30b7\u30e7\u30a6\u30a8\u30a4\u30b3\u30fc\u30dd\u30ec\u30fc\u30b7\u30e7\u30f3): Japanese real estate utilization company focused on converting vacant properties into parking, storage, and rental businesses. Comparable on the land/asset-utilization business model that underpins a significant share of Kase's operations.
• Terrada Warehouse (\u5bfa\u7530\u5009\u5eab): Tokyo-based warehousing and logistics real estate operator with a similar model of converting owned real estate into storage, logistics, and value-added real estate services. Highly comparable as a Japanese urban real-estate utilization and storage specialist with premium positioning.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Customer concentration

• Xx.com/kase_group
• YouTubeyoutube.com/@kasegroup

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Subsidiaries7 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 Kase Group