Authense Law Firm Relocates Shinjuku Office to Shinjuku Nomura Building
Authense Law Firm relocated its Shinjuku office to the 33rd floor of the Shinjuku Nomura Building on February 9, 2026. The move expands its office footprint to accommodate a growing volume of client consultations and an increase in attorneys and staff. One week earlier, on February 2, digital marketing firm Bullet Group also moved its headquarters to the same building, underscoring the continued clustering of growth companies within Nishi-Shinjuku’s high-rise office district (see related article: Bullet Group Relocates Headquarters to Shinjuku Nomura Building in Nishi-Shinjuku).
The firm, a full-service law office marking its 20th anniversary in 2025, has a total headcount of 364, including 83 attorneys. It operates seven offices in Roppongi (headquarters), Tokyo, Shinjuku, Kitasenju, Yokohama, Chiba, and Osaka, providing services ranging from corporate law and startup advisory to individual legal matters. Its one-stop service model, delivered in collaboration with affiliated tax and patent firms, has supported business expansion and organizational strengthening, which prompted the relocation.
The Shinjuku Nomura Building was completed in June 1978 and comprises 50 above-grade floors and five basement levels. The property is approximately a seven-minute walk from the West Exit of JR, Odakyu Line and Keio Line Shinjuku Station. The vacancy rate for large-scale office buildings (with a Gross Floor Area of 10,000 tsubo or more) within a 10-minute walk of Shinjuku Station declined sharply after peaking in the high 4% range in August 2024, reaching the mid-1% range as of December 2025. This marks the lowest level since 2020, prior to the COVID-19 pandemic, indicating rapidly tightening supply-demand conditions in the area (compiled by the editorial team based on estie market research).
Key Facts
Project Name: Authense Law Firm Office Relocation
Tenant: Authense Law Firm
Relocation Date: February 9, 2026
Previous Location: Tokyo Midtown Tower 22F (9-7-1 Akasaka, Minato-ku, Tokyo)
New Location: Shinjuku Nomura Building 33F (1-26-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo)
Property Overview (Shinjuku Nomura Building)
Completion: June 1978
Number of Floors: 50F / B5
Gross Floor Area: Approx. 35,760 tsubo (approx. 1,181,157 sq. ft.)
Typical Floor Plate: Approx. 382 tsubo (approx. 12,628 sq. ft.)
Ceiling Height: 2,525 mm
Elevators: 24 passenger elevators
Access: Approx. 7-minute walk from Shinjuku Station (JR, Odakyu Line, Keio Line) West Exit; 4-minute walk from Nishi-Shinjuku Station (Tokyo Metro Marunouchi Line)