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Ryu Takizawa

9 papers in the library · 6 citations · publishing 2024-2026

Papers

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Impact of self-guided mindfulness versus self-compassion application on physiological and psychological outcomes in workers: A randomized controlled trial.

Applied Psychology: Health and Well-Being August 2026 Takumu Kurosawa, Koichiro Adachi, Ryu Takizawa

This randomized controlled trial compared 4-week self-guided self-compassion meditation (SCM) and mindfulness meditation (MM) apps among workers in two active arms (n = 201); analyses included intervention initiators with session-level data (SCM n = 86; MM n = 85). Primary daily outcomes were pre-session levels and immediate pre-post changes in HR, heart rate variability by RMSSD, and...

DOI: 10.1111/aphw.70201 (opens in new tab) Full text (opens in new tab) Mindfulness Low‐intensity interventions Physiological measures Randomized controlled trial +2

Gender differences in the influence of app-based mindfulness meditation on emotion regulation: a randomised controlled trial.

Scientific Reports April 6, 2026 Koichiro Adachi, Takumu Kurosawa, Ryu Takizawa

This study investigated whether gender moderates the effects of online mindfulness-based interventions (MBIs) on mental health outcomes in non-clinical populations. Specifically, we explored gender-related patterns in emotion regulation and cognitive flexibility. Data were obtained from a randomised controlled trial employing a crossover design in 2022 and 2023. Three hundred Japanese workers...

DOI: 10.1038/s41598-026-46317-z (opens in new tab) Full text (opens in new tab) Cognitive flexibility Emotion regulation Gender differences Mindfulness-based interventions +1

Effects of Self-Compassion and Mindfulness Interventions on Mental Health and Work-Related Outcomes Among Japanese Workers: Randomized Controlled Trial

Journal of Medical Internet Research February 10, 2026 Takumu Kurosawa, Koichiro Adachi, Ryu Takizawa

Background: Mental health problems among workers are a significant global concern, leading to substantial economic losses, particularly due to presenteeism. While mindfulness and self-compassion practices have shown promise in improving psychological well-being and occupational outcomes, traditional interventions often require a high time commitment. Low-intensity digital interventions remain...

DOI: 10.2196/79991 (opens in new tab) Mindfulness Randomized controlled trial Mental health Psychological intervention +4

Effects of an 8-Week App-Based Mindfulness Intervention on Mental Health in Working Women: Randomized Controlled Trial.

Journal of Medical Internet Research February 2, 2026 Riko Uwagawa, Koichiro Adachi, Mariko Shimoda et al.

Although working women experience increased work-related stress, preventive interventions to reduce its negative effects on their mental health are insufficient. This study evaluated the effectiveness of an 8-week mindfulness-based self-help intervention via a smartphone app across 4 domains (general psychological, work-related, family-related, and work-to-conflict) among working women. This...

DOI: 10.2196/62814 (opens in new tab) Full text (opens in new tab) Mindfulness Applications Health promotion Interventions +8

Impact of an eight-week app-based mindfulness intervention on subjective and objective sleep quality: a randomized controlled trial among working women

BMC Digital Health October 8, 2025 Riko Uwagawa, Koichiro Adachi, Kohki Kaji et al.

Although working women experience significant work-related stress, preventive interventions to reduce its negative impact on their mental health are inadequate. Interventions for improving sleep quality have been effective in reducing the negative effects of work-related stressors. Mindfulness-based interventions have been effective in improving sleep quality. We evaluated the effectiveness of...

The Cumulative Effect of a 12-Week Online Mindfulness-Based Meditation Intervention Programme on Autonomic Nerve Functions by Pupillary Light Reflex: A Pilot Randomised Controlled Trial.

Stress and Health August 1, 2025 Koichiro Adachi, Ryu Takizawa

This study aimed to determine whether online-guided mindfulness-based interventions (MBIs) in daily life improve autonomic nervous system function as measured by the pupillary light reflex (PLR) in healthy subjects. A total of 94 university students were randomly allocated to either an intervention group or a waitlist control group. Participants practiced single-session meditation in a...

Effects of an online mindfulness-based intervention on brain haemodynamics: a pilot randomized controlled trial using functional near-infrared spectroscopy.

Cerebral Cortex August 1, 2024 Koichiro Adachi, Ryu Takizawa

Although many neuroimaging studies have evaluated changes in the prefrontal cortex during mindfulness-based interventions, most of these studies were cross-sectional studies of skilled participants or involved pre-post comparisons before and after a single session. While functional near-infrared spectroscopy is a useful tool to capture changes in the hemodynamic response of the prefrontal...

DOI: 10.1093/cercor/bhae321 (opens in new tab) Full text (opens in new tab) Meditation Hemodynamic response Oxygenated hemoglobin Prefrontal cortex +1

Mindful Self-Compassion Smartphone Intervention for Worker Mental Health in Japan: Protocol for a Randomized Controlled Trial.

JMIR Research Protocols July 15, 2024 Takumu Kurosawa, Koichiro Adachi, Ryu Takizawa 6 citations

Mental health problems among workers cause enormous losses to companies in Japan. However, workers have been considered to have limited access to psychological support because of time constraints, which makes it difficult for them to engage in face-to-face psychological support interventions. This study aimed to present an intervention protocol that describes a randomized controlled trial to...

DOI: 10.2196/53541 (opens in new tab) Full text (opens in new tab) Mental health Mindfulness meditation Mobile phone Preventive intervention +7

Gender Differences in the Influence of Mindfulness Meditation on Emotion Regulation: Randomized Controlled Trial with a Smartphone App Intervention

Koichiro Adachi, Takumu Kurosawa, Ryu Takizawa preprint

Abstract This study investigated the potential moderating effects of gender in online mindfulness-based interventions (MBIs) on mental health problems in healthy populations. Specifically, it explored gender differences in emotion regulation and cognitive flexibility and the mechanisms underlying the influence of MBIs on mental health problems. Data were obtained from randomized controlled...