CSR Information

Sustainable Forest Management

Sustainable Forest Management

Forests perform a variety of functions for the public good, such as storing and purifying water, preventing floods and landslides, absorbing and retaining CO2 which is linked to global warming, and preserving biodiversity.

On a basis of appropriate management, the Sumitomo Forestry Group advances sustainable forest management both in Japan and overseas to ensure that timber resources will be available in perpetuity while preserving the public functions of forests.

Forest Management and Timber Usage

Forest Management and Timber Usage

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Cultivation—Preserving the Public Functions of Forests
Through Appropriate Management

The Sumitomo Forestry Group manages a total 46,444 hectares of its own forests in Japan and a total of around 230,000 hectares of plantation forests overseas. The Group works to maintain and enhance the public functions of these forests by carrying out underbrush clearing, pruning, thinning and other appropriate management required for them to grow.

Carbon stocks* of the Company-owned forests in Japan in fiscal 2016, the amount of immobilized carbon dioxide at beginning of fiscal 2016 were 12,540,000 t-CO2 (up by 140,000 t-CO2 from the previous fiscal year) whereas those of overseas plantations were 7,830,000 t-CO2 (up 477 t-CO2).

  • * The amount of CO2 absorbed by forests and stored as carbon. Calculated using a formula that multiply volume density, carbon content, and other coefficients set per type of tree against the accumulated amount in the forest. Furthermore, if there is a purchase of large forest during this period, they are omitted as its increase of accumulated amount within the last year cannot be identified. Natural trees and planted trees are within the scope in Japan but only planted tree are included for overseas.

Carbon Stock of Forests in Japan and Overseas

Carbon Stock of Forests in Japan and Overseas
  • *1 Domestic: Carbon stock as of the beginning of each fiscal year
  • *2 Overseas: Carbon stock as of the beginning of each calendar year

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Harvesting—Supplying Timber Products Through Systematic Harvesting

The Sumitomo Group logged 58,362 m³ of trees in Japan and 1,161,680 m³ of trees in overseas in fiscal 2016 in forests it owns or manages based on long-term logging plans. Harvested trees are milled and processed before finally reaching the market as products such as housing and furniture. In the case of timber turned into structural members for housing, the products are used for several decades.

Trees retain CO2 as carbon even after they are turned into products. Using timber products and constructing wooden houses can therefore be likened to building forests in the city.

The total domestic carbon stocks in timber that was used in construction of the houses in the MOCCA (timber sollutions) activities in fiscal 2016 reached 228,000 t-CO2.

The Sumitomo Forestry Group helps to increase carbon stocks even in cities by advancing the construction of houses and the MOCCA activities, thereby contributing to global warming prevention efforts.

  • * Calculated as carbon dioxide fixation per newly built buildings multiplied by number of complete buildings until fiscal 2015. From this fiscal year, CO2 fixation is calculated by separating actual amount of wood used for new housing, rental housing, and MOCCA business and calculating the carbon content based on their specific gravity.
Carbon stock of the timber used in the construction of houses and MOCCA (timber solutions) activities in Japan in fiscal 2016

Carbon stock of the timber used in the construction of houses and MOCCA (timber solutions) activities in Japan in fiscal 2016

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Usage—Wood Can Be Reused and Does Not Increase CO2

Even after being dismantled or at the end of their product life, wooden construction and timber products can be reused as fiberboard or other wood materials in construction or as raw material for making paper, and all that time it will continue to retain CO2. The CO2 released when timber is ultimately burned as a wood fuel is what has been absorbed from the atmosphere as trees grow, and therefore it does not represent an increase in CO2 in the atmosphere over the life cycle of the tree.

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Planting–Preparing for the Next Cycle

Harvesting and using timber alone will lead to a diminishing of forest resources. The Sumitomo Forestry Group therefore promotes sustainable forest management by always planting new trees after harvesting.

In fiscal 2016, the Group planted approximately 119 hectares of forests in Japan and around 8,280 hectares overseas. The newly planted trees will absorb CO2 during their growth and retain it as carbon.

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CSR Report2017