Who We Are

Intro

Tsubomi G.K. was founded in Minato-ku, Tokyo in June 2025 by Kristen Jasinski, who has run real estate investment, management, and renovation businesses in Chicago & Naples, Florida for over 26 years.

In the U.S., she has handled the full cycle of residential real estate — from single-family homes to condominiums — including acquisition, rental management, renovation, and resale, with combined managed and owned assets valued at over USD 85 million. She also holds multiple licenses issued by the State of Florida spanning real estate brokerage, property management, and residential construction.

As a teenager, she lived in Isesaki, Gunma as a Rotary Youth Exchange student, and later worked in Tokyo and as a bilingual business liaison between a Japanese parent company and its U.S. partners — building a lasting connection to Japan.

While the name “Tsubomi” means “flower bud” in Japanese, reflecting the company’s own beginnings and its outlook for growth in the Japanese real estate market. But deeper than that Tsubomi pays tribute two special people who were instrumental in Kristen’s early days in Japan. Tsubo comes from Mr. Tsubota, Kristen’s first and favorite boss while working in Japan. In addition, Tsubo represents a traditional means to measure the size of homes and land. Mi pays tribute to Kristen’s host Mom Miyoko who tirelessly spent so much time teaching Kristen to love and understand Japanese culture. Tsubomi represents a flower bud, but it also represents two special people in my life and it represents Beautiful Spaces – something which has been the focus of Kristen’s creative and entrepreneurial efforts for so many years.

Information

Company

Business Name
Tsubomi G.K.
Representative

ヤシンスキー クリステン
Kristen Jasinski

Location

〒105-0013
2-3-8 Hamamatsucho, Minato Ward, Tokyo

Access

2-minute walk from
JR Hamamatsucho Station;
1-minute walk from
Daimon Station
(Toei Oedo/Asakusa lines)

Phone

+81 (090) 2340-6668

FAX

+81 (090) 2340-6668

Hours

By Appointment Only

Opening Hours

Mon-Fri

Financial Year

January 1 through December 31 each year

Ownership Structure

Structure

Tsubomi’s JPY 5 million in initial capital, JPY 4.75 million was contributed by WKJ Holdings LLC — the US real estate holding company where Kristen also serves as representative, with a Collier County, Florida property portfolio valued at USD 30 million — and the remaining JPY 250,000 by Kristen herself. Backing from an established US real estate holding company, with 26+ years of track record, as parent investor is one of Tsubomi’s distinguishing features.

Partners