Masaaki Arai

Founder at OPEN HOUSE GROUP CO., LTD.

Net worth: 2 043 M $ as of 31/07/2026

60 year

17 connections

Consumer Durables

Finance

Consumer Services

Profile

Masaaki Arai occupies the position of President & Representative Director at Open House Co., Ltd. and Chairman at Gunma Pro Basketball Commission KK (a subsidiary of Open House Co., Ltd.). He is also on the board of 5 other companies.

Known holdings in public companies

Company	Date	Number of shares	Valuation	Valuation date
OPEN HOUSE GROUP CO. LTD 32.76%	31/03/2026	38,237,200 ( 32.76% )	2 043 M $	31/07/2026

Masaaki Arai active positions

Companies	Position	Start
OPEN HOUSE GROUP CO., LTD.	Founder	01/09/1997
Gunma Pro Basketball Commission KK Gunma Pro Basketball Commission KK Movies/EntertainmentConsumer Services Owns and operates a professional basketball team	Chairman	-

All active positions of Masaaki Arai

Former positions of Masaaki Arai

Companies	Position	End
Hawk ONE Corp. Hawk ONE Corp. HomebuildingConsumer Durables Engages in housing construction work, renovation and real estate business	Director/Board Member	-
Open House Architect Co. Ltd. Open House Architect Co. Ltd. HomebuildingConsumer Durables Designs, plans, constructs interior and exterior works for homes and buildings	Director/Board Member	-
OH Real Estate Management KK	Director/Board Member	-
Open House Realty & Investments, Inc.	Director/Board Member	-
IBNet Co. Ltd. IBNet Co. Ltd. Finance/Rental/LeasingFinance Provides home loan and financing services	Director/Board Member	-

See the detail of Masaaki Arai's experience

Experiences
Positions held

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Inactive

Listed companies

Private companies

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Connections

1st degree connections

1st degree companies

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Members of the board

Executives

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Linked companies

Private companies	8
IBNet Co. Ltd. IBNet Co. Ltd. Finance/Rental/LeasingFinance Provides home loan and financing services	Finance
Open House Group Co., Ltd. Open House Group Co., Ltd. HomebuildingConsumer Durables Constructs and sells single-family houses	Consumer Durables
Open House Development Co., Ltd. Open House Development Co., Ltd. Real Estate DevelopmentFinance Provides real estate services	Finance
Open House Architect Co. Ltd. Open House Architect Co. Ltd. HomebuildingConsumer Durables Designs, plans, constructs interior and exterior works for homes and buildings	Consumer Durables
Hawk ONE Corp. Hawk ONE Corp. HomebuildingConsumer Durables Engages in housing construction work, renovation and real estate business	Consumer Durables
Open House Realty & Investments, Inc.
OH Real Estate Management KK
Gunma Pro Basketball Commission KK Gunma Pro Basketball Commission KK Movies/EntertainmentConsumer Services Owns and operates a professional basketball team	Consumer Services