A multi-institutional research team in Japan evaluated the impact of the Revised Health Promotion Law and related local ordinances on indoor smoking policies in restaurants and bars. Their analysis identified a modest but significant increase in the proportion of smoke-free establishments following the full enforcement of the national indoor smoking ban in April 2020. Additional increases were observed in jurisdictions covered by stronger passive smoking prevention ordinances implemented by the Tokyo Metropolitan Government and Chiba City. The research is published in the journal Public Health.

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