A Method for Classifying Impressions of Indoor Plants Based on Leaf Shape

A study conducted by Kenro Tokuhiro et al., in collaboration with parkERs from park corporation, Pasona Nihon Somubu, and Toyota Motor Corporation's Frontier Research Center, was published in the Building and Environment.

Biophilic design, which incorporates natural elements such as indoor plants into interior spaces, has been shown to reduce stress and promote psychological recovery. It is increasingly recognized as a spatial strategy that enhances cognitive performance. Although a wide range of plant species is used for indoor greenery, there have been few studies have investigated the impressions that each plant gives to people.

In this study, a plant classification map was developed based on impression evaluations provided by experts in interior plant design. Focusing on the shape of plant leaves, the researchers proposed a classification method that links quantified leaf features with perceived impressions. In addition, a survey involving both experts and general participants confirmed that plants with small leaves tend to evoke a sense of relaxation across both groups. This impression-based classification method, grounded in leaf shape, enables the selection and design of plants according to the intended use of a space, and is expected to contribute to the enhancement of human Well-Being.

Title: Subjective Mapping of Indoor Plants Based on Leaf Shape Measurements to Select Suitable Plants for Indoor Landscapes
Authors: Tokuhiro, K., Sugimoto, H., Ikeuchi, A., Tsujie, T., Wada, E., Muramatsu, M., Ohto, C.
Journal Name: Building and Environment
Published: May 15, 2025
https://doi.org/10.1016/j.buildenv.2025.112828