ケイアイスター不動産株式会社KI-STAR REAL ESTATE CO.,LTDAliasケイアイスタービルド株式会社Aliasケイアイエポックメイキング株式会社Aliasケイアイプランニング株式会社Aliasケイアイスターデベロップメント株式会社Aliasケイアイクラフト株式会社Alias株式会社ゆたかパートナーズAlias
Custom-built home businessComprehensive real estate distribution businessAsset businessManagement businessResidential land developmentSubdivision housing businessPre-owned home renovation business
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Network
NETWORK
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History
213 EVENTS
Established KEIAI PLANNING Ltd.
Established Kei Ai Planning Co., Ltd.
Implemented Entity Conversion to KEIAI PLANNING Co., Ltd.
Organizational change to Kei Ai Planning Inc.
Established Granville Home Co., Ltd.
Established Granville Home Co., Ltd.
Changed the company name from Granville Home Co., Ltd. to KEIAI Corporation.
Granville Home Co., Ltd. changed its company name to Kei Ai Corporation
Top home seller among homebuilders in Gunma Prefecture (*1)
No. 1 in housing sales in Gunma Prefecture (according to Housing Industry Research Institute)
Top home seller for two years in a row among homebuilders in Gunma Prefecture (*1)
No. 1 in housing sales in Gunma Prefecture for two consecutive years (according to Housing Industry Research Institute)
Top home seller for three years in a row among homebuilders in Gunma Prefecture (*1)
No. 1 in housing sales in Gunma Prefecture for three consecutive years (according to Housing Industry Research Institute)
Top home seller for four years in a row among homebuilders in Gunma Prefecture (*1)
Changed the company name from KEIAI Corporation. to KI-STAR REAL ESTATE CO., LTD.
Started sales of custom-built houses
Opened the first store in Tochigi Prefecture
No. 1 in housing sales in Gunma Prefecture for four consecutive years (according to Housing Industry Research Institute)
Name change to Kei Ai Star Real Estate Co., Ltd.
Entered the custom home business
First store in Tochigi Prefecture
Started sales of condominium
Entered the condominium business
Started sales of detached lots with restrictions by building agreement as the first private company in Honjo City
Launch of subdivision with the first private building agreement system in Honjo City
Opened the first store in Ibaraki Prefecture
Top home seller among homebuilders in Gunma Prefecture (*1)
First store in Ibaraki Prefecture
Home Builder in Gunma Prefecture, Residential Sales Division, 1st place (Survey by Housing Industry Research Institute Co., Ltd.)
Top home seller for two years in a row among homebuilders in Gunma Prefecture (*1)
Home Builder in Gunma Prefecture, Residential Sales Division, 1st place for 2 consecutive years (Survey by Housing Industry Research Institute Co., Ltd.)
Introduced craftsman program (as a new personnel system)
Top home seller for three years in a row among homebuilders in Gunma Prefecture (*1)
Establishment of the Craftsman System
Home Builder in Gunma Prefecture, Residential Sales Division, 1st place for 3 consecutive years (Survey by Housing Industry Research Institute Co., Ltd.)
Opened the first store in Kanagawa Prefecture
Nominated on the ranking of “Great Place to Work” by Great Place To Work® Institute Japan
First store opening in Kanagawa Prefecture
Selected in the Great Place to Work 'Company with a Sense of Fulfillment' ranking
Established “KEIAI Casa STYLE” as a brand of Built-for-Sale Detached houses
Top custom-built houses seller among homebuilders in Gunma Prefecture (*1)
Ranked the 22nd on the ranking of “Great Place to Work” by Great Place To Work® Institute Japan
Establishment of KAI Kairaz Style Residential Sales
Home Builder in Gunma Prefecture, Custom Home Sales Division, 1st place (Survey by Housing Industry Research Institute Co., Ltd.)
Great Place to Work 'Company with a Sense of Fulfillment' 22nd place
Won “the 5th Excellent Business Award” by Japan Association of Home Suppliers
Listed on the Second Section of the Tokyo Stock Exchange
Selected as “Great Place To Work” in Saitama Prefecture by Great Place To Work® Institute Japan
Received the 5th 'Excellent Business Award' from the National Housing Industry Association (a general incorporated association).
Listed on the Second Section of the Tokyo Stock Exchange
Awarded Great Place to Work 'Company with a Sense of Fulfillment' in Saitama Prefecture
Acquired shares of YOKATOWN Co., Ltd. and made it a consolidated subsidiary
Received “Kurumin” Certification by Ministry of Health, Labour and Welfare as a company supporting childcare
Established the head office of KI-STAR REAL ESTATE CO., LTD. in Tokyo
Listed on the First Section of the Tokyo Stock Exchange
Ranked 1st place among house builders in Gunma Prefecture (*1)
Acquisition of shares of Yoka Town Co., Ltd. (Consolidated subsidiary)
Certified as a Childcare Support Company 'Kurumin' by the Ministry of Health, Labour and Welfare
Establishment of Tokyo headquarters
Listed on the First Section of the Tokyo Stock Exchange
1st place in Gunma Prefecture Builder Ranking (Survey by Housing Industry Research Institute Co., Ltd.)
Acquired shares of ASAHI HOUSING Co., Ltd. and made it a consolidated subsidiary
Established KI-STAR DEVELOPMENT Co., Ltd., KEIAI CRAFT Co., Ltd., KI-STAR BUILD Co., Ltd., KEIAI NET CLOUD Co., Ltd.
Acquired shares of KENSIN Co., Ltd. and made it an equity-method affiliate
Established KEIAI BUILD Co., Ltd. and opened the first store in Fukuoka Prefecture
Acquisition of shares of Asahi Housing Co., Ltd. (Subsidiary)
Establishment of KAI Star Development Co., Ltd.
Establishment of KAI Craft Co., Ltd.
Establishment of KAI Star Build Co., Ltd.
KEIAI Net Cloud Co., Ltd. established
Kenshin Co., Ltd. acquisition of shares (applying equity method as related company)
KEIAI Build Co., Ltd. established; first store in Fukuoka Prefecture
Established KEIAI KAIMASSE Co., Ltd.
Established KEIAI PLANNING Co., Ltd. and opened the first store in Aichi Prefecture
KEIAI Kaimasse Co., Ltd. established
KEIAI Planning Co., Ltd. established; first store in Aichi Prefecture
Acquired shares of KENSIN Co., Ltd. and made it a consolidated subsidiary
Selected as a “FY2018 Nadeshiko Brand” by the Ministry of Economy, Trade and Industry
Won “Recognition of Excellent Foreign Construction Worker 2018” by Ministry of Land, Infrastructure, Transport and Tourism
KEIAI NET CLOUD Co., Ltd. started franchise business
Selected as a constituent stock of the “JPX-Nikkei Mid and Small Cap Index”
Ranked the 3rd place among house builders nationwide for the number of Built-for-Sale Detached houses starts (*1)(*2)
Kenshin Co., Ltd. acquisition of shares (consolidated subsidiary)
Ministry of Economy, Trade and Industry selected 'Nadeshiko Stock' for fiscal year 2018
Ministry of Land, Infrastructure, Transport and Tourism 2018 Outstanding Foreign Construction Worker Award.
KEIAI Net Cloud Co., Ltd. started FC business
Selected as a constituent of the JPX Nikkei Small Cap Index
In fiscal year 2018, number of single-family housing starts ranked third nationwide among builder groups (according to Japan Housing Industry Research Institute)
Selected as a “FY2019 Nadeshiko Brand” by the Ministry of Economy, Trade and Industry
KEIAI KAIMASSE Co., Ltd. changed its name to KAIMASSE FUDOSAN Co., Ltd.
Established KS CAREER Co., Ltd. and it launched human resources services.
Opened the first store in Miyagi, Fukushima, Shizuoka Prefecture
Won “Recognition of Excellent Foreign Construction Worker 2019” by Ministry of Land, Infrastructure, Transport and Tourism
YOKATOWN Co., Ltd. ranked the 1st place among house builders in Fukuoka Prefecture (*1)
Established CASA ROBOTICS Co., Ltd. and it started to provide “IKI”, a brand of standardized custom-built houses of one story.
Ranked the 3rd place for two years in a row among house builders nationwide for the number of Built-for-Sale Detached houses starts (*1)(*2)
Ministry of Economy, Trade and Industry selected 'Nadeshiko Stock' for fiscal year 2019 for the second consecutive year
KEIAI Kaimasse Co., Ltd. changed its name to Kaimasse Real Estate Co., Ltd.
KS Career Co., Ltd. established; started comprehensive human resources services business
First stores opened in Miyagi Prefecture, Fukushima Prefecture, and Shizuoka Prefecture
Ministry of Land, Infrastructure, Transport and Tourism 2019 Outstanding Foreign Construction Worker Award.
In fiscal year 2019, Yoka Town Co., Ltd. ranked first in Fukuoka Prefecture builder ranking (according to Japan Housing Industry Research Institute)
Casa Robotics Co., Ltd. established; started selling IKI (Iki) standardized single-story custom homes through Casa Robotics
In fiscal year 2019, number of single-family housing starts ranked third nationwide among builder groups for the second consecutive year (according to Japan Housing Industry Research Institute)
Acquired shares of Presto Home Co., Ltd. and made it a consolidated subsidiary
Presto Home Co., Ltd. changed its name to KEIAI PREST Co., Ltd.
Started sales of apartment buildings for investment
Selected as “FY2020 New Diversity Management Selection 100” by the Ministry of Economy, Trade and Industry
Established DRC TECH HOLDINGS Co., Ltd.
Established Japan Wood-Housing Association
Established KI-STAR REAL ESTATE AUSTRALIA PTY LTD (KAU) as a subsidiary in Australia.
Started “KEIAI Farm”
KEIAI PLANNING Co., Ltd. opened the first store in Hyogo Prefecture
CASA ROBOTICS Co., Ltd. joined DX Property Promotion Association
Started Sustainability Promotion Department
Designated as “Digital Transformation Certification” by Ministry of Economy, Trade and Industry
Ranked the 3rd place for three years in a row among house builders nationwide for the number of Built-for-Sale Detached houses starts (*1)
YOKATOWN Co., Ltd. ranked the 1st place for two years in a row in Fukuoka Prefecture for the number of low-rise houses starts (*1)
Prest Home Co., Ltd. acquisition of shares (consolidated subsidiary)
On April 1, 2021, changed name to KEIAI Preset Co., Ltd.
Started apartment business
First selected for the Ministry of Economy, Trade and Industry's 2020 "Top 100 New Diversity Management Companies"
Establishment of DRC TECH Holdings Inc.
Establishment of the Japan Wood-Construction Housing Association (a general incorporated association)
Establishment of the Australian local corporation "KI-Star Real Estate Australia Pty Ltd"
Opened the farm "KAI Farm"
KAI Planning Inc. opened its first store in Hyogo Prefecture
Casa Robotics Inc. joined the DX Real Estate Promotion Association
Established the Sustainability Promotion Office
Obtained certification as a "DX Certified Business" as defined by the Ministry of Economy, Trade and Industry
In 2020, the number of single-family residential construction starts ranked third nationwide among Builder Groups for the third consecutive year (according to the Japan Housing Industry Research Institute)
In 2020, "Yoka Town Inc." ranked first in the number of low-rise residential construction starts in Fukuoka Prefecture for the second consecutive year (according to the Japan Housing Industry Research Institute)
Transferred to Prime Market of the Tokyo Stock Exchange
KEIAI PLANNING Co., Ltd. opened the first store in Gifu, Osaka, Hyogo, Saga, Oita, Kagoshima Prefecture.
Selected as “a constituent of JPX-Nikkei Index 400”
Ranked the 3rd place for four years in a row among house builders nationwide for the number of Built-for-Sale Detached houses starts (*1)
YOKATOWN Co., Ltd. ranked the 1st place for three years in a row in Fukuoka Prefecture for the number of low-rise houses starts (*1)
Transitioned to the Tokyo Stock Exchange Prime Market
KAI Planning Inc. opened its first stores in Gifu, Osaka, Hyogo, Saga, Oita, and Kagoshima Prefectures
Selected as a constituent stock of the JPX Nikkei 400 Index
In 2021, the number of single-family residential construction starts ranked third nationwide among Builder Groups for the fourth consecutive year (according to the Japan Housing Industry Research Institute)
In 2021, "Yoka Town Inc." ranked first in the number of low-rise residential construction starts in Fukuoka Prefecture for the third consecutive year (according to the Japan Housing Industry Research Institute)
Opened the first store in Hiroshima, Kumamoto, Hyogo Prefecture
KEIAI PLANNING Co., Ltd. opened the first store in Kyoto, Okayama Prefecture.
Acquired shares of L-Housing Co., Ltd. and made it a consolidated subsidiary
KEIAI NET REALTY Co., Ltd. changed its name to KEIAI HOME HOUSE Co., Ltd.
Moved the head office to Tokyo Midtown Yaesu
KEIAI HOME HOUSE Co., Ltd. changed its name to HANAMARU HOUSE Co., Ltd.
Established “MUNCORP PTY LTD” as a joint venture by KAU
KEIAI NET CLOUD Co., Ltd started “IKI.net” as construction franchise business.
Athletes and Head Coach belonging to KEIAI CHALLENGED ATHLETE TEAM contributed to the first victory in the Deaf Futsal World Cup 2023 in Brazil as Japan women’s national team
Established KI-Star Real Estate America, inc. as a subsidiary in the U.S.
YOKATOWN Co., Ltd. ranked the 1st place for four years in a row in Fukuoka Prefecture for the number of low-rise houses starts (*1)
Rated “B” in the CDP Climate Change Report 2023
Rated “A-” in the CDP Supplier Engagement Rating 2023
Opened first stores in Hiroshima, Kumamoto, and Hyogo Prefectures
KAI Planning Inc. opened its first stores in Kyoto and Okayama Prefectures
Acquired shares of L Housing Co., Ltd. (consolidated as a subsidiary)
KAI Net Realty Inc. changed its name to KAI Home House Co., Ltd.
Moved headquarters to Tokyo Midtown Yaesu
KAI Home House Co., Ltd. changed its name to Hanamaru House Co., Ltd.
Established JV 'MunCorp Pty Ltd' by Australian local corporation 'KAU'
KAI Net Cloud Co., Ltd. launched architectural FC business 'IKI.net'
Players and coach from KAI Challenge Athlete Team contributed to Japan women's national team's first win at the 5th Deaf Futsal World Championship (Deaf Futsal World Cup 2023) in Brazil
Establishment of the U.S. local corporation 'KI-Star Real Estate America, Inc.'.
In fiscal year 2022, Yoka Town Co., Ltd. ranked first for the number of low-rise residential units started in Fukuoka Prefecture for four consecutive years (according to the Housing Industry Research Institute)
Achieved a 'B' score in CDP Climate Change Report 2023
Achieved an 'A-' score in CDP Supplier Engagement Assessment 2023
KEIAI NET CLOUD Co., Ltd. started “IKI.net” as construction franchise business.
Started investment properties business
“Komichi no Komachi” won “iF DESIGN AWARD 2024”, one of the world’s three major design awards
Acquired shares of Shinyamagata Hometech Co., Ltd. and made it a consolidated subsidiary
Acquired shares of TAKASUGI Co., Ltd. and made it a consolidated subsidiary
Established YUTAKA PARTNERS Co., Ltd. and started providing financial services called "YUTAKA Bank"
Opened the first store in Hokkaido Prefecture
Made a full-scale entry into the renovation business
Formed a business and capital alliance with Home Position Co.,Ltd. and made it an equity-method affiliate
Released the "Integrated Report 2024"
Rated “B” in the CDP Climate Change Report 2024
Rated “B-” in the CDP Forests
Started revenue-generating business (one residence building)
Concept property 'Komichi no Komachi' won one of the world's top three design awards, the iF DESIGN AWARD 2024
Acquired shares of Shin-Yamagata Home Tech Co., Ltd. (consolidated subsidiary)
Acquired shares of TAKASUGI Co., Ltd. (consolidated subsidiary)
Established Yutaka Partners Co., Ltd. and launched financial service 'Yutaka Bank'
Opened first store in Hokkaido
Fully entered the renovation business
Capital and business alliance with Home Position Co., Ltd. (applying equity method, becoming affiliate)
Published Integrated Report 2024
Achieved a 'B' score in CDP Climate Change Report 2024
Achieved a 'B-' score in CDP Forest
Formed a business and capital alliance with Home Position Co., Ltd. and made it an equity-method affiliate
KAIMASSE Co., Ltd. changed its name to KEIAI Epoch Making Co., Ltd.
Participated as a total support member at the Tokyo 2025 Deaflympics
Established the head office of KI-STAR REAL ESTATE CO., LTD. in Osaka Prefecture
Opened the first store in Niigata Prefecture
Started selling newly built condominiums
Released the "Integrated Report 2025"
Received the ”Platinum Kurumin” certification
Completed the sale of all 35 home lots of MUNCORP PTY LTD's second project
Rated “A-” in the CDP Climate Change Report 2025
Rated “B-” in the CDP Forests
KAI Messe Real Estate Co., Ltd. changed its name to KAI Epoch Making Co., Ltd.
Sponsoring as a total support member for the 25th Summer Deaflympics in Tokyo 2025
Establishment of Osaka branch
First store opening in Niigata Prefecture
Commencement of sales for newly built condominium
Publication of Integrated Report 2025
Obtained Platinum Kurumin certification
MunCorp Pty Ltd Project No. 2: Completion of contracts for all 35 plots
Achieved an A- score in the CDP Climate Change Report 2025
Achieved a B- score in the CDP Forest
§07
News
31 ARTICLES
Announcement of the Appointment of Mr. Aramaki Katsutaka as the New President and CEO of Kensei Group Company
Kei Star Real Estate Co., Ltd. announced that Mr. Aramaki Katsutaka has been appointed as the new President and CEO of Kensei Co., Ltd., a group company, effective November 12, 2026. Mr. Takahiro Ooguchi, who had served as the President and CEO of Kensei, stepped down on the same date. Mr. Aramaki joined the company in 2019 and has held key positions in the Design Department, Residential Sales Division, and Corporate Sales Department before assuming the role of President and CEO of Kensei in November 2026.
Def Judo Athlete Masaki Sato Holds Special Class in Fujiyoshida City
Def Judo athlete Masaki Sato, affiliated with Kei Ai Star Real Estate Co., Ltd., conducted a special judo class in Fujiyoshida City. The event was part of the city’s Olympic Movement project, featuring instruction in standing and ground techniques, as well as a talk on the Deaf Olympics.
DEF Futsal Experience Session by the KEI AI Challenge Athlete Team Featured in Shizuoka Shimbun
On November 3, 2026, the Shizuoka Shimbun highlighted a 'DEF Futsal Experience Session' conducted by DEF athletes from KEI AI Star Real Estate Co., Ltd. The article introduced the session's content and participants' impressions.
Company tour for middle and high school girls conducted
Kei Istar Real Estate participated in the "Girls Meet STEM Company Tour" organized by the Yamada Shintaro D&I Foundation, and held experiential events for middle and high school girls at its Tokyo headquarters and Osaka branch. Participants experienced office tours, residential design and manufacturing experiences, and talk sessions with female employees, thereby getting exposure to STEM fields and the housing and construction industry. This initiative aims to increase the number of girls pursuing science and technology fields, providing opportunities to discover interests and future career possibilities.
Achieved over 75% internal generative AI usage
Kei AI Star Real Estate Co., Ltd. reported that as part of its internal DX promotion, it encouraged the use of generative AI in business operations, and the usage rate among target employees exceeded 75%. This is an achievement in the real estate industry, which has a strong analog culture.
Tokyo Metropolitan University × KAI Star, Def Sports Caravan
The 'Def Sports School Caravan' is scheduled to be held in five sessions. The first session was held at Okutama Town Okutama Junior High School, and the second at Shibuya Ward Jinnan Elementary School. The third session is scheduled to be held on November 6, 2026, at Tokyo Metropolitan Musashikō High School.
Former Japan National Team Player Shūhō Takeda Appointed as Ambassador
Kei Aistar Real Estate announced that former Japan national soccer team player Shūhō Takeda has taken on the role of ambassador. Leveraging Takeda's competitive experience and recognition, the company aims to strengthen organizational development, corporate branding, and recruitment efforts. Additionally, he is expected to provide advice on sports promotion initiatives, including support for para-sports and community contributions.
Athletes Tokai and Sakai Receive Osaka Sports Award
Defaster athlete Kana Tokai and Airi Sakai, members of Kei Aistar Real Estate, received the 'Osaka Sports Award Outstanding Athlete Special Award' at the 2026 Osaka Sports Awards ceremony. Both athletes are silver medalists at the 2025 Deaflympics.
Keiastar Real Estate, Registration of 'Vibrant and Energetic Declaration for Men and Women' and Acquisition of Plus Certification
Keiastar Real Estate Co., Ltd. was registered as a 'Vibrant and Energetic Declaration for Men and Women' operator by Osaka Prefecture and obtained the 'Vibrant Plus' certification from the same prefecture. As a result, the company obtained certifications and recognitions related to sustainability and diversity promotion at its three major locations—Saitama Prefecture, Tokyo, and Osaka Prefecture—where it has its headquarters and branches. The company will continue to strive to create a workplace environment where diverse talents can thrive through sustainable human capital management and the promotion of DE&I.
2027 New Graduate Hiring Ceremony Held at Tokyo Midtown Yaesu
Kei AI Star Real Estate held the 2027 new graduate hiring ceremony at Tokyo Midtown Yaesu on October 1, 2026. Over 200 students, the largest number ever, attended, and President Keiji Handa, CEO, cheered the new hires.
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Public records
GOV
National Tax Agency basic information3030001060211
Source: National Tax Agency Corporate Number Publication Site, basic three items
