Utilization of Green Building Certification
- Policy for Acquiring Green Building Certification and Assessment
- DBJ Green Building Certification
- CASBEE Assessment
- Top-Level Facility Certification
Green building certifications are granted by third parties regarding initiatives for the reduction of environmental load of buildings, improvement of comfort of users, etc. to assure high performance.
In an aim to increase the credibility and objectivity of its efforts to reduce environmental load as well as increase the value of its buildings in the mid-to-long-term, NBF endeavors to utilize green building certifications from third parties.
Policy for Acquiring Green Building Certification and Assessment
NBF aims to acquire 100% to acquire green building certifications and Assessment for existing properties under management on an ongoing basis for the purpose of reducing the environmental risks of its portfolio and increasing asset value in the mid-to-long-term.
Summary of Green Building certified properties in NBF’s portfolio (as of June 30, 2026)
| Rating | Number of Certified properties | Total floor area of certified properties（㎡） | Certification rate (by floor area) |
|
|---|---|---|---|---|
| DBJ Green Building | ★★★★ | 1 | 14,118 | 0.7% |
| CASBEE for Real Estate | S | 49 | 1,709,187 | 87.6% |
| A | 20 | 228,382 | 11.7% | |
| Subtotal | 69 | 1,937,569 | 99.3% | |
| Total | 70 | 1,951,687 | 100% |
- Calculated based on the floor area multiplied by ownership ratio of the property or on the floor area of exclusively owned area.
- NBF Toranomon Bldg. (land with leasehold interest) is excluded from the calculation.
- As of June 30, 2026, D-TOWER TOYAMA and Nihonbashi Honcho M-SQUARE had obtained BELS certification, and Nihonbashi Honcho M-SQUARE had also obtained ZEB Ready certification. However, the green building certification rate shown above is based on the certification status of DBJ Green Building Certification and CASBEE for Real Estate, and does not include these certifications.
DBJ Green Building Certification
DBJ Green Building Certification is a certification program established by Development Bank of Japan Inc. in April 2011 to recognize properties with outstanding environmental and social performance. Based on a comprehensive assessment system that evaluates not only environmental performance but also social considerations, including initiatives to address the needs of diverse stakeholders, DBJ certifies eligible properties as “Green Buildings,” which are considered essential in today’s real estate market. Certification results are awarded on a five-level scale.
| Property Name | DBJ Green Building |
|---|---|
| Nihonbashi Honcho M-SQUARE | ★★★★ |
CASBEE for Real Estate
"CASBEE (Comprehensive Assessment System for Built Environment Efficiency)" is a system to evaluate
environmental performance of buildings, operated by the CASBEE Research Committee, established in April 2001
as an industrial/academic/government cooperation project under the support of the Housing Bureau of the
Ministry of Land, Infrastructure, Transport and Tourism. The system comprehensively evaluates the quality of
buildings, including but not limited to environmental considerations such as using materials and equipment
which are energy saving or have a lower environmental impact, internal amenities and also giving
consideration to views.
CASBEE for Real Estate is evaluated in four levels (from S rank to B rank).
- NBF Musashikosugi Bldg., N Bldg. and S Bldg. have each obtained separate CASBEE for Real Estate, with the N Bldg. receiving an “S” rating and the S Bldg. receiving an “A” rating. As the two buildings are treated as a single property in NBF’s portfolio, the above list presents the rating of the N Bldg. as representative.
Top-Level Facility Certification
The “Top-Level-Facility (Specified High Quality Commercial Facility with Measures against Global Warming)” is a scheme to proportionally mitigate the required greenhouse gas emission reduction ratio of the subject facility, in accordance with the level of measures taken against global warming, if such building is approved by the Tokyo Governor as meeting “certain standards set forth by the Governor” as an “office building promoting an excellent level of measures against global warming (Specified High Quality Commercial Facility with Measures against Global Warming).”
| Property Name | Certified Level |
|---|---|
| GranTokyo South Tower | Top-Level Facility |
| Shinjuku Mitsui Bldg. | Near-Top-Level Facility |
| IIDABASHI GRAND BLOOM | Near-Top-Level Facility |