Ichigo Office REIT Investment Receives Highest S Rank CASBEE Environmental Certification for the Win Gotanda Building 2

December 15, 2025

Issuer

2-6-1 Marunouchi, Chiyoda-ku, Tokyo

Representative: Takafumi Kagiyama, Executive Director https://www.ichigo-office.co.jp/en

Asset Management Company

Representative: Hiroshi Iwai, President

Inquiries: Masahiro Izumi, Head of Finance & Planning Tel: +81-3-4485-5231

Ichigo Office received an S rank, the highest CASBEE (Comprehensive Assessment System for Built Environment Efficiency) certification, up from its previous A rank, for the Win Gotanda Building 2.

1. Certification Overview

   Name	Win Gotanda Building 2
   Location	4-1-2 Osaki, Shinagawa-ku, Tokyo
   Total Floor Area	5,317.81m2
   Structure	Steel Reinforced Concrete/ Reinforced Concrete, 9 Floors & 1 Basement
   Exterior
   	S Rank
   Rank

2. CASBEE Assessment

   1. Ichigo Office and Ichigo Investment Advisors work collaboratively with the building management company to set energy efficiency goals each year and generate ongoing efficiency improvements.

   2. The building employs environmentally conscious cleaning and sanitation practices.

   3. The building's large natural ventilation openings contribute to tenant well-being and comfort.

   4. The building promotes biodiversity with consideration for the local vegetation and species diversity.

   5. The building implements measures to address and mitigate natural disaster risks.

   6. The building offers convenient access to and promotes the use of public transportation.

3. CASBEE Overview

   CASBEE evaluates and rates buildings' environmental performance based on their energy and resource efficiency, recycling activity, environmental load, and aesthetic appeal.

   The CASBEE certification is a rating system that measures the impact of environmentally-conscious buildings on real estate value. It evaluates existing buildings that have been completed for more than one year based on multiple environmental performance evaluation categories. Based on the total score, buildings are ranked on a four-grade scale (from highest to lowest): S, A, B+, B.

   CASBEE Environmental Performance Evaluation Categories

   1. Energy/greenhouse gas

   2. Water

   3. Materials

   4. Biodiversity/sustainable site

   5. Indoor environment

      For a list of CASBEE-certified buildings in Japan, please refer to the URL below (Japanese only): https://www.ibec.or.jp/CASBEE/MP_certification/CASBEE_MP_certified_buld_list.htm

4. Ichigo Office's Environmental Initiatives

As a result of the above certifications, Ichigo Office has now received CASBEE certifications for 14 assets. This brings the total number of environmental certifications for its assets to 27 across 22 buildings, which accounts for 37.4% of its total leasable office area as of today.

In line with sponsor Ichigo joining RE100, a global initiative to accelerate the transition of electricity used by businesses to 100% renewable energy, Ichigo Office completed transitioning all its assets to renewable electricity in August 2024.

As a specialized office REIT, Ichigo Office will continue to work to promote the environmental and energy efficiency and reduce the environmental impact of its office buildings.

1Goal setting date

2Target date

3Assuming Leasable Area does not change from the end of October 2024 fiscal period to the end of October 2029 fiscal period