Sumitomo Forestry strives in the residential property development business by providing roughly 350 high-quality spec homes each year through technical expertise accumulated in new custom-built housing and landscaping businesses. We develop long-lasting properties by taking advantage of nature with the goal of realizing a sustainable and prosperous society.

Forest Garden Hadano, spec homes in Hadano City, Kanagawa Prefecture, received the first ABINC (Association for Business Innovation in harmony with Nature and Community) certification under the spec homes and city area category in 2018. The ABINC certification system certifies results of biodiversity preservation activities of companies to promote coexistence of nature and people. The certification of office buildings and commercial facilities began in 2014 and has expanded its scope to include housing complexes and factories.

The property design of Forest Garden Hadano is green property that coexists with life. It realizes rich greenery through the use of local tree species and Harmonic Plants^®. Consideration toward sustainable circulation of water utilizing spring water was one of the major factors of receiving the certification.

We exhibited in the garden contest held as part of the 41st National Urban Greening Kawasaki Fair in 2024, where Sumitomo Forestry Landscaping’s work, "Forest CUBE: A Garden Enveloped in the Comfort of Nature, Inspiring Thoughts for the Future," won the Good Design Award in the "Green Workspace" category.

The award-winning work was designed as a garden that envelops a stylish space with organic greenery, The design plan involved rotating the axis by 34° to incorporate the cherry blossoms on the south side as borrowed scenery. The garden is composed of materials such as Kawasaki steel, which supported Japanese industry; renewable wood; and Anzan-iwa stone from Nebukawa, Odawara City. The selected tree species primarily consist of species native to the upper reaches of the Tama River, chosen for their ecological friendliness to wild birds and butterflies.creating a special environment to enjoy creative work.

A total of 46,000 copies of Sumitomo Forestry Landscaping's "An Illustrated Guide to Home Trees" have been printed since the first edition published in 2013, with two revisions afterwards. An Illustrated Guide to Home Trees introduces more than 500 types of garden trees that add color to our lives. This book provides information such as time of flowering and autumn leaves and the area where planting is possible to let people know attractiveness and characteristics of each tree.
The revised edition I was published in March 2017, following the establishment of the Invasive Alien Species List by the Ministry of the Environment and the Ministry of Agriculture, Forestry and Fisheries, and taking into account further impacts on the ecosystem. We also restructured Sumitomo Forestry Landscaping's own criteria for invasive species.
The revised edition II was published in March 2021 with partially altered content in response to the modification to the Plant Variety Protection and Seed Act and the addition of original varieties, and contains 508 species, including six original varieties.

(1) Revision of descriptions in response to the revision of the Plant Variety Protection and Seedling Law
The "Variety Registration Number" and other information were added to the original trees for sale and the trees registered as varieties in the illustrated book in compliance with the modification of the Seed and Seedling Law, as registered varieties are now obliged to be labeled.

(2) SDGs (Sustainable Development Goals) initiatives were added
Through its green business, Sumitomo Forestry Landscaping Co., Ltd. is implementing initiatives in line with the SDGs, such as protecting biodiversity through the concept of "Harmonic Plants^®" in the consideration of sustainability, and creating comfort, enjoyment, and beauty in society by constructing homes and communities that harness the "Power of Greenery". We are putting these initiatives into action. These initiatives have been included in this revision.

Sumitomo Forestry Landscaping has begun assessing carbon storage by trees in residential gardens as part of its efforts towards a decarbonized society. Trees play an important role towards a decarbonized society as they can absorb CO₂ during their growth and continue to fix it as carbon.

Combined with Harmonic Plants^®, a guiding principle of Sumitomo Forestry Landscaping, the aim is to create gardens that take into account local biodiversity, while also looking at the environment of the entire planet.

At Sumitomo Forestry's Yonago model house (Yonago City, Tottori Prefecture), plantings were mainly of native species in accordance with the Harmonic Plants^® guidelines. As a model case for LCCM housing, carbon storage in gardening was also assessed.

The amount of carbon storage was calculated for trees, wooden decks and wooden fences as materials that can be used for carbon fixation in gardening. The garden at the Yonago model house fixes approximately 6.2 tonnes of CO₂ equivalent (equivalent to the carbon storage of about 21 trees of 40-year-old cedars in an planted forest).

In the future, the system will be developed to enable simpler assessment, and preparations will also be made to enable recognition of the fixed volume that increases as properly managed trees grow.