Effects of Shinrin-Yoku Retreat on Mental Health: A Pilot Study in Fukushima, Japan

Shinrin-yoku (forest bathing) is a cost-effective healing practice, and has attracted the interest of scientists. Recently, its effects on mental health has been increasingly reported. Japanese university students suffer from high rates of mental health problems, and the number of suicides remain high, despite the total number of suicides in Japan has been decreasing. Effective mental health approaches are sought after for Japanese students, however healthful treatment has not been identified to date. Accordingly, this pre-post pilot study evaluated the levels of mental wellbeing, self-compassion, and loneliness among 25 Japanese undergraduate students who participated in a three-day shinrin-yoku retreat in Fukushima, before, straight after and two weeks after the retreat. The mean scores of mental wellbeing increased significantly from pre-retreat to post-retreat; self-compassion and common humanity increased significantly from pre-retreat to follow-up; and mindfulness increased significantly from pre-retreat to post-retreat, and from pre-retreat to follow-up. The mean scores of loneliness did not make any significant changes. As self-compassion has been found strongly associated with mental health of university students, shinrin-yoku retreat should be evaluated with a larger sample and in a shorter time frame.