Takatoshi Tabuchi
Biographic Data
| ID | 1238145 |
|---|---|
| NAME | Takatoshi Tabuchi |
| GIVEN NAMES | Takatoshi |
| FAMILY NAME | Tabuchi |
| SIGNATURE | TABUCHI T |
| AFFILIATIONS | Osaka International Cancer Institute |
| ORCID | 0000-0002-1050-3125 |
| VERIFIED | Yes |
| TOTAL WORKS | 96 |
| TOTAL CITATIONS | 101 |
| AUTHOR COUNT | 96 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 1982 |
| LATEST PUBLICATION YEAR | 2026 |
| H-INDEX | 6 |
Urban and rural differences in healthcare access among survivors of child sexual abuse: A nationwide survey
Child sexual abuse (CSA) is associated with poorer healthcare access in adulthood, but evidence remains limited on whether this association differs between urban and rural settings. We analyzed data from the 2023 Japan COVID-19 and Society Internet Survey (JACSIS), including 27,699 adults aged 18–79 years. Participants reported CSA before age 18 using behavior-specific items and two direct screening questions. We assessed adult healthcare access …
Social network diversity and Covid-19 infection and severity risk: A longitudinal population study
Background: Clinical evidence on how social network diversity (SND) influences the risk of infection and disease severity during the coronavirus disease 2019 (COVID-19) pandemic remains limited. We aim to investigate the associations between SND and the risk of COVID-19 infection and disease severity using a large-scale longitudinal cohort study. Methods: We analyzed data from participants in a longitudinal study, the Japan COVID-19 and Society I…
Prevalence and characteristics of above-recommended-dose non-medical use of over-the-counter drugs in Japan: A descriptive cross-sectional study using a nationwide online survey
BACKGROUND: This study aimed to describe the prevalence, acquisition routes, and help-seeking behavior of non-medical use of over-the-counter (OTC) drugs among Japanese online survey respondents. METHODS: A cross-sectional online survey using the Japan "Society and New Tobacco" Internet Survey (JASTIS) was conducted from February 23 to March 31, 2025. Past 12-month use, misuse defined as use above the recommended dose, and non-medical use among r…
Emerging generative AI divide: Personal, positional, and resource-based factors associated with use and reasons for non-use
The Unexpected Side Effects of Lockdowns on Those Barely Inside and Outside of Lockdown Areas
This study implements a geographical regression discontinuity design to estimate the impact of Japan's anti‐COVID‐19 policy, which imposed what is called “a state of emergency” (SOE). This policy can be considered a ‘mild lockdown’ without any geographical restriction. In January 2021, an SOE was declared in 11 out of Japan's 47 prefectures. We utilised the fact that the risk of infection and other factors were geographically continuous across th…
Social network size and mental health among older adults in Japan: A nationwide cross-sectional analysis of the Jacsis 2024 study
Introduction: Social relationships are crucial for healthy ageing, but the role of social network size in older adults' mental health remains underexplored in nationwide studies. We examined associations between social network size and mental health in a national sample of older Japanese adults. Methods: We analysed cross-sectional data from the 2024 Japan COVID-19 and Society Internet Survey (JACSIS), a nationwide internet survey, including 6786…
Health and social inequities among cisgender gay and bisexual men in Japan: A nationwide cross-sectional study using a large-scale web-based survey
Gay and bisexual men (GBM) face elevated risks of hypertension, diabetes, and depression, but these conditions are strongly influenced by social discrimination, economic disadvantage, and recreational substance use, complicating their interpretation. This study aimed to compare the social, lifestyle, and health characteristics of GBM with those of heterosexual men in Japan, where epidemiological data remain limited. We analyzed data from the 2022…
Pro-tobacco legislative representation and current smoking: An individual-level panel study of older adults in Japan
Representation by pro-tobacco legislators was associated with elevated smoking prevalence among older adults. These findings suggest the importance of addressing the commercial determinants of health and insulating tobacco policy from industry-aligned influence
Association Between Daily Convenience Store Use and Social Capital Among Young People in Japan: An Exploratory Secondary Analysis of Cross-Sectional Study Data
The number of convenience stores in Japan has increased dramatically since their introduction in the 1970s, offering a wide range of essential services. However, epidemiological research on their use and public health impacts remains limited. This study aimed to explore the characteristics of frequent convenience store users and the association between daily use and social capital, measured as general trust in one's neighbors and trust in mutual …
AI companions and subjective well-being: Moderation by social connectedness and loneliness
Conversational AI companions—such as Replika and Character.AI—are increasingly adopted to provide emotional support, yet their psychological effects remain underexplored. This study investigates whether the use of AI companions is associated with enhanced well-being, and whether these associations are moderated by social network/support and loneliness. We analysed cross-sectional data from 14,721 Japanese adults participating in nationwide intern…
Knowledge and Concerns About Smoking‐Related Health Risks: A Cross‐Sectional Analysis of the 2021 International Tobacco Control Japan and Korea Surveys
A cross-sectional study on mental health and quality of life among LGBTQ+ individuals in Japan
Introduction: Studies from Western countries claim LGBTQ+ people face mental health burdens. It remains unclear in Japan. This study aimed to examine mental health challenges among LGBTQ+ individuals in Japan. Methods: JACSIS (Japan COVID-19 and Society Internet Survey) 2022 participants were categorized in cisgender-heterosexual, gay-identifying, lesbian-identifying, bisexual-identifying, questioning, transgender and nonbinary. Associations betw…
Association of Adverse Childhood Experiences and Substance Use: Evidence from a Japanese Population Study
Longitudinal associations between informal caring, social network, and psychological distress among adolescents and young adults: Modelling within-person effects
Increased psychological distress and social network preceded the onset of informal caring among young persons. Incorporating psychological distress assessment may benefit the early identification of and support for young carers. The long-term interplay between social networking and informal caring needs further clarification
Association of remote work with tobacco and alcohol use: A cross-sectional study in Japan
Remote workers showed higher prevalence of tobacco dependence and hazardous alcohol use. The health behavior of remote workers should be carefully monitored
Longitudinal impact of tobacco advertising, promotion and sponsorship on perceptions of harmfulness of tobacco and uptake of heated tobacco products in Japan: Findings from the Jastis study
TAPS exposure may reduce perceived harm and increase HTP uptake, even among NS and FS, highlighting the need for comprehensive regulations and risk communication amid shifting public attitudes and tobacco markets
Lower suicidal ideation linked to easier access to urban green spaces during the Covid-19 pandemic: A nationwide study in Japan
Urban green spaces (UGSs) have been linked to improved mental health and lower suicide rates, yet their protective role during large-scale crises remains underexplored. We examined associations of UGS accessibility with long-term and pandemic induced new-onset suicidal ideation during the early phase of the COVID-19 pandemic in urban Japan, using data from a nationwide health survey of 17,376 participants (August 2020). Modified Poisson regressio…
Association between a father-unfriendly workplace culture, paternity leave, mental health and child abuse
Quantitative Definition of Low-Health-Interest Populations by Using Regression Trees: A Nationwide Internet Survey in Japan
We determined the cutoff values of the IHS as <32 for a lower-health-interest group and <25 for the lowest-health-interest group. Using these cutoffs might enable us to reveal the characteristics of low-health-interest populations
Occupational differences in Sars-CoV-2 infection: The Japan Covid-19 and Society Internet Survey (Jacsis) study in 2022
In Japan, medical and care workers had a higher prevalence of contracting COVID-19 compared to non-essential workers. However, this trend emerged during the peak of the COVID-19 spreading in the summer of 2022
Impacts of revised smoke-free regulations under the 2020 Japan Health Promotion Act on cigarette smoking and heated tobacco product use in indoor public places and homes: Findings from 2018 to 2021 In…
The implementation of the HPA was limited in its effectiveness. Comprehensive regulations with no exemptions are needed in Japan
Changes in social isolation and loneliness prevalence during the Covid-19 pandemic in Japan: The Jacsis 2020–2021 study
Social isolation decreased from the first to the second year of the COVID-19 pandemic, whereas loneliness increased. Assessing the COVID-19 pandemic's impact on social isolation and loneliness contributes to understanding who was particularly vulnerable during the pandemic
Challenging the utility of 24-hour recall of exclusive breast feeding in Japan
INTRODUCTION: WHO recommends exclusive breast feeding from birth to 6 months. However, to monitor populations, it recommends using the proportion of infants under 6 months who were exclusively breastfed during the previous 24 hours. To assess the usefulness of 24-hour recall, we (1) compared the prevalence of exclusive breast feeding measured by since-birth recall to the prevalence measured by 24-hour recall and (2) quantified each indicator's as…
Backward-bending labor supply and urban location
Impact of the Covid-19 pandemic on pregnancy postponement – evidence from Japan
Japan has faced a decline in fertility since the coronavirus disease 2019 (COVID-19) pandemic. This study aimed to investigate the rate of pregnancy postponement and its contributing factors, with a particular focus on economic- and COVID-19 infection-related indicators. This study used data from 768 observations of married women aged 18 to 50 years with pregnancy intentions. The data were obtained from two rounds of a large web-based survey cond…
Urban Agglomeration and Dispersion: A Synthesis of Alonso and Krugman
Taste heterogeneity, labor mobility and economic geography
Geographically-based discrimination is a social determinant of mental health in a deprived or stigmatized area in Japan: A cross-sectional study
Separating Urban Agglomeration Economies in Consumption and Production
Interregional Income Differentials and Migration: Their Interrelationships
The major objective of this paper is to demonstrate that interregional income differential is exogenous to interregional net migration, but not conversely. Utilizing Japanese prefectural-based data for 1954-82, we conduct the following three kinds of analyses to confirm this statement. Firstly, a simple comparison of the crests of interregional time-series plots was made to see which occurred first. Secondly, Sims', 1972, test of causality was do…
A new economic geography model of central places
Urban agglomeration, capital augmenting technology, and labor market equilibrium
Trade and the structure of cities
On the number and size of cities
We study the effects of a decrease in trade costs on the spatial distribution of industry in a multi-regional economy, when a rise in the regional population of workers generates higher urban costs. When the number of cities is unaffected by falling trade costs, small cities become smaller for large trade costs, medium-sized cities for medium values of trade costs, and large cities for small trade costs. Furthermore, when urban costs are identica…
Bottleneck Congestion and Modal Split
Preferential Trade Agreements Harm Third Countries
Journal Article Preferential Trade Agreements Harm Third Countries Get access Pascal Mossay, Pascal Mossay University of Reading and CORE Search for other works by this author on: Oxford Academic Google Scholar Takatoshi Tabuchi Takatoshi Tabuchi University of Tokyo and RIETI Search for other works by this author on: Oxford Academic Google Scholar The Economic Journal, Volume 125, Issue 589, 1 December 2015, Pages 1964–1985, https://doi.org/10.11…
The rally ‘round the flag effect in third parties: The case of the Russian invasion of Ukraine
Immediately after the onset of a war, the popularity of the head of a warring government suddenly surges. Known as the “rally ‘round the flag effect”, this phenomenon may well spill over to third-party countries that are not actually at war. This paper specifically studies the case of the Russian invasion of Ukraine. We exploited the results of surveys in Czechia, Japan, and Uruguay that were already underway when the conflict began. We identify …
To be connected or not to be connected? The role of long-haul economies
We investigate whether localities gain or lose employment when there are connected to a transportation network, such as a high-speed railway line. We argue that long-haul economies—implying that the marginal transportation cost decreases with network distance—play a pivotal role in understanding the location choices of firms. We develop a new spatial model to show that improvements in transportation infrastructure have nontrivial impacts on the l…
Comparative advantage, agglomeration economies and trade costs
Pollution and city size: Can cities be too small
We study optimal and equilibrium sizes of cities in a city system model with pollution. Pollution is a function of population size. If pollution is local or per-capita pollution increases with population, equilibrium cities are too large under symmetry; with asymmetric cities, the largest cities are too large and the smallest too small. When pollution is global and per-capita pollution declines with city size, cities may be too small under symmet…
Self-organizing marketplaces
Optimal Distribution of City Sizes in a Region
First, an optimal spatial distribution model is proposed of population sizes in a country. The objective function to be examined consists of the amount of interaction benefit which is formulated by means of accessibility, and the amount of intraaction congestion cost which is measured by means of population density. Second, the optimal population distribution is obtained by use of this optimization model, and the necessary and sufficient conditio…
Optimal Distribution of City Sizes in a Region
First, an optimal spatial distribution model is proposed of population sizes in a country. The objective function to be examined consists of the amount of interaction benefit which is formulated by means of accessibility, and the amount of intraaction congestion cost which is measured by means of population density. Second, the optimal population distribution is obtained by use of this optimization model, and the necessary and sufficient conditio…
Urban agglomeration, capital augmenting technology, and labor market equilibrium
Existence and Stability of City-Size Distribution in the Gravity and Logit Models
An attempt is made to analyze reasons for and consequences of migration under zero population growth by use of a system of simultaneous differential equations. Intercity migration is assumed to take place based upon differences in utilities, where the utility function is expressed as a function of city size. It is revealed that a deterministic specification of the utility leads to an unstable distribution of city sizes, whereas a stochastic speci…
Interregional Income Differentials and Migration: Their Interrelationships
The major objective of this paper is to demonstrate that interregional income differential is exogenous to interregional net migration, but not conversely. Utilizing Japanese prefectural-based data for 1954-82, we conduct the following three kinds of analyses to confirm this statement. Firstly, a simple comparison of the crests of interregional time-series plots was made to see which occurred first. Secondly, Sims', 1972, test of causality was do…
Dynamics of urban land use: Sequential location of an office firm and residence
Bottleneck Congestion and Modal Split
Urban Agglomeration and Dispersion: A Synthesis of Alonso and Krugman
Separating Urban Agglomeration Economies in Consumption and Production
Agglomeration and Trade Revisited
The purpose of this paper is twofold. First, we present an alternative model of agglomeration and trade that displays the main features of the recent economic geography literature while allowing for the derivation of analytical results by means of simple algebra. Second, we show how this framework can be used to adopt a forward-looking approach to the dynamics of migration in the process of agglomeration instead of the myopic Marshallian model us…
Taste heterogeneity, labor mobility and economic geography
On the number and size of cities
We study the effects of a decrease in trade costs on the spatial distribution of industry in a multi-regional economy, when a rise in the regional population of workers generates higher urban costs. When the number of cities is unaffected by falling trade costs, small cities become smaller for large trade costs, medium-sized cities for medium values of trade costs, and large cities for small trade costs. Furthermore, when urban costs are identica…
Trade and the structure of cities
Self-organizing marketplaces
A new economic geography model of central places
Geographically-based discrimination is a social determinant of mental health in a deprived or stigmatized area in Japan: A cross-sectional study
Individualized and institutionalized residential place-based discrimination and self-rated health: A cross-sectional study of the working-age general population in Osaka city, Japan
Institutionalized PBD may be a more important environmental determinant of SRH than other area-level SES indicators such as deprivation. Although it may have a smaller health impact than individualized PBD, attention should be paid to invisible and unconscious aspects of institutionalized PBD to improve residents' health
Regional science research in China: Spatial dynamics, disparities and regional productivity
Preferential Trade Agreements Harm Third Countries
Journal Article Preferential Trade Agreements Harm Third Countries Get access Pascal Mossay, Pascal Mossay University of Reading and CORE Search for other works by this author on: Oxford Academic Google Scholar Takatoshi Tabuchi Takatoshi Tabuchi University of Tokyo and RIETI Search for other works by this author on: Oxford Academic Google Scholar The Economic Journal, Volume 125, Issue 589, 1 December 2015, Pages 1964–1985, https://doi.org/10.11…
Tobacco price increase and smoking behaviour changes in various subgroups: A nationwide longitudinal 7-year follow-up study among a middle-aged Japanese population
We confirmed that the tobacco price rise was associated with increasing cessation and decreasing relapse concurrently. Furthermore, this price rise was associated with favourable smoking changes in nearly all population subgroups; a large differential impact was not observed across the various subgroups
A New Construction of Ricardian Theory of International Values: Analytical and Historical Approach
Electronic Cigarette Use and Smoking Abstinence in Japan: A Cross-Sectional Study of Quitting Methods
The benefit of electronic cigarettes (e-cigarettes) in smoking cessation remains controversial. Recently, e-cigarettes have been gaining popularity in Japan, without evidence of efficacy on quitting cigarettes. We conducted an online survey to collect information on tobacco use, difficulties in smoking cessation, socio-demographic factors, and health-related factors in Japan. Among the total participants (n = 9055), 798 eligible persons aged 20-6…
Electronic cigarette use in restaurants and workplaces where combustible tobacco smoking is not allowed: An Internet survey in Japan
Among adult Japanese e-cigarette ever-users, approximately 26%-29% had ever used and 16%-19% had frequently used e-cigarettes in restaurants and/or workplaces where combustible tobacco smoking is not allowed. Policy-makers may need to establish explicit rules as to e-cigarette use in smoke-free environments
Heat-not-burn tobacco product use in Japan: Its prevalence, predictors and perceived symptoms from exposure to secondhand heat-not-burn tobacco aerosol
A popular TV programme triggered IQOS diffusion in Japan. Extrapolating from survey results to the general population, around 3.1 million people currently use IQOS in Japan. Tobacco control organisations and governments should closely monitor HNB tobacco and consider how to regulate it
Pollution and city size: Can cities be too small
We study optimal and equilibrium sizes of cities in a city system model with pollution. Pollution is a function of population size. If pollution is local or per-capita pollution increases with population, equilibrium cities are too large under symmetry; with asymmetric cities, the largest cities are too large and the smallest too small. When pollution is global and per-capita pollution declines with city size, cities may be too small under symmet…
Use of Heated Tobacco Products within Indoor Spaces: Findings from the 2018 ITC Japan Survey
Although heated tobacco products (HTPs) have become increasingly popular in Japan, little is known about whether these emerging tobacco products are being used within indoor public spaces. Nationally representative data were obtained prior to implementation of a comprehensive smoke-free law in Japan as part of Wave 1 of the International Tobacco Control Japan Survey (February-March 2018). We estimated the weighted prevalence of HTP use within ind…
Medicine (57 works) · Environmental health (47 works) · Demography (30 works) · Population (30 works) · Smoking Behavior and Cessation (28 works) · Psychology (27 works) · Demography (26 works) · Economics (24 works) · Public health (22 works) · Internal Medicine (18 works)