The COVID19 pandemic has 'paused' urban development across the world on a variety of spatial, temporal, and social scales, to some extent. Some cities in a specific period, such as Wuhan in January-April 2020 and Shanghai in April-June 2022, were completely shut down in the context of strictest lockdown measures. The pandemic has pressed us to rethink the challenging development of healthy city particularly when confronting 'spatially constrained' urban environment.This special issue aims to collect empirical evidence of healthy city challenges and solutions, generated from five case studies of Asian cities in three large-size countries (Japan, China, and Indonesia). Five papers on this special issue contribute to understanding the impacts of urban environment on health risks, health intervention, and wellbeing on different spatial scales through using qualitative, quantitative, or mixed methods. The key focuses of these papers are on walkability (city scale), physical activity (park scale), community gardening (neighborhood scale), spatial intervention of COVID diffusion (destination site), and perception of health risks (neighborhood).The first paper by Zhou and Homma (2022) is entitled "estimating walk score and examining its association with safety factors of neighborhood environment in Kumamoto, Japan'. The major evidence produced from this urban study in Japan include the spatially heterogeneous correlations between walkability and safety factors (traffic accident and crime) across a city. It highlights the concern of protecting walkable environment from safety risks because safe and walkable neighborhoods together help achieve the demanding benefit to residents' public health and well-being. Another strength of this paper is extensive use of high-resolution spatial data for measuring accurate walkability at building level. This has addressed a kind of global inequality in urban studies caused by the varying level of urban data infrastructure development between countries and cities. This challenge should be concerned by policy makers of municipal and national governments.The second paper by Yuan, Zhang et al. ( 2022) is on "the impact of urban parks accessibility in cold regions on leisuretime physical activity levels of older adults in winter". This case study of Harbin city in Northeastern China explored the linkage between park accessibility and level of leisuretime physical activity in the context of cold urban environment. The analytical results exhibit that the vigorous level of physical activity within urban parks by the elderly group is significantly contributed by a shorter walking time