Company Profile
Seika Co., Ltd. is a real estate company that supports customers in finding their ideal home.
Corporate Information
Company housing mediation and agency services
Leopalace21 franchise business
Monthly rental property business
Property management business
Registration support organization and visa application services
Support services for ALT-related businesses
Chiba (Motoyawata, Tsudanuma, Yotsukaido)
Saitama (Minamiurawa)
Kanagawa (Yokohama Totsuka)
Nagoya, Osaka, Fukuoka, Okinawa
Asuka Small-Amount Short-Term Insurance
Plaza Rent Guarantee Co., Ltd.
GPlus Media Inc. (GaijinPot)
Nihon Agent Inc. (Wagaya Japan)
Recruit SUUMO
LIFULL HOME'S Co., Ltd.
At Home Co., Ltd.
Tokyo Recycle
List of Offices
Shinkoiwa Office
2F, Nishikata Building, 1-8-7 Nishishinkoiwa, Katsushika-ku, Tokyo
Aoto Office
2F, Kurita Building, 3-35-12 Aoto, Katsushika-ku, Tokyo
Motoyawata Office
1F, Regina Prima, 3-4-8 Yawata, Ichikawa-shi, Chiba
Tsudanuma Office
4F, Tsuchiya Real Estate Tsudanuma Building, 2-13-12 Maebaranishi, Funabashi-shi, Chiba
Yotsukaido Office
301, Wako Building, 2003-21 Shikawatari, Yotsukaido-shi, Chiba
Totsuka Station Office
201, El Sur, 3003-1 Yoshidacho, Totsuka-ku, Yokohama-shi, Kanagawa
Kashii Station Office
1A, Bless Kashii Station Front, 1-15-4 Kashii Ekimae, Higashi-ku, Fukuoka-shi
Nodahanshin Office
101, Toa Building, 3-27-14 Yoshino, Fukushima-ku, Osaka-shi, Osaka
Shinjuku Office
106, Win Yotsuya, 2-18 Sumiyoshicho, Shinjuku-ku, Tokyo
Okinawa Office
2F, Unufa Building, 1-12-15 Izumizaki, Naha-shi, Okinawa
Nagoya Office
1F, Meieki Kodama Building, 4-2-5 Meieki, Nakamura-ku, Nagoya-shi, Aichi
Saitama Office
2F, Tanaka Building, 2-36-16 Minamiurawa, Minami-ku, Saitama-shi, Saitama
Company History
Shinkoiwa Office Opened
Tsudanuma Office Opened
Aoto Office Opened
Yotsukaido Office Opened
First in-house brand store opened in Motoyawata
Totsuka Station Office Opened
Motoyawata Office transitioned to Leopalace21 Franchise Division
Sumai no SEIKA Shinjuku Office Opened
Sumai no SEIKA Osaka Office Opened
Sumai no SEIKA Okinawa Office Opened
Sumai no SEIKA Nagoya Office Opened
Registered as a Support Organization
About Sumai no SEIKA (Our Brand)
Building on our experience from the franchise business, we launched our own brand in April 2017 to diversify into sales brokerage and property management.
We have many foreign staff members and can provide services in English, Korean, Chinese, Russian, Turkish, French, and Tagalog.
We also provide flexible support for various move-in procedures, including services such as installing used home appliances in collaboration with partner companies.
Multilingual Support
Contact Us
For inquiries about properties or questions about our company, please feel free to contact us.