Measuring Information Behavior: A Time Budget Survey in Japan

This paper discusses the results of a time budget survey which was conducted nationwide in Japan in 1995 on ‘information behavior’, that is, the amount of time people spent communicating and using information media ranging from conversations to computers. We propose a three-dimensional time budget survey as a method for measuring information behavior in actual life. The method classifies information behavior into 24 categories and measures them with respect to three factors, i.e. time, location and purpose of behavior. Our survey revealed that the total time spent on information behavior was about seven hours per day, of which about 45% was spent watching TV. The displacement effect of PC use on TV watching was estimated by a “time-shift matching” design. The results demonstrated that use of a PC does not significantly affect TV viewing, despite a large difference in TV viewing time between PC users and non-users.     

A population size estimate of the finless porpoise,Neophocaena phocaenoides, from aerial sighting surveys in Ariake Sound and Tachibana Bay, Japan

We estimated the population size of the finless porpoise (Neophocaena phocaenoides) in Ariake Sound and Tachibana Bay of western Kyushu, southwestern Japan, from aerial sighting surveys using line transect methods. All 12 surveys were conducted from May 1993 to May 1994 (8 in Ariake Sound and 4 in Tachibana Bay). In addition to these, 14 surveys were also carried out to obtain information on porpoise occurrence in Tachibana Bay (5 surveys) and in neighboring Sumo Nada (5) and Yatsushiro Sound (4). In Ariake Sound, 225 porpoise groups (369 animals) were detected during all flights totalling 1,694.4 km. In Tachibana Bay, a total of 997.8 km was surveyed and 55 groups (290 animals) were sighted. However, no sightings were recorded in Sumo Nada (distance searched = 148.7 km) and Yatsushiro Sound (208.4 km). In Ariake Sound, few sightings were recorded from waters shallower than 5 m in depth. In Tachibana Bay all animals were detected from waters of less than 50 m depth. The population size was estimated as 1,983 animals in Ariake Sound (95% CI = 1,382-2,847), 1,110 in Tachibana Bay (95% CI = 642-1,920), and 3,093 in the 2 waters (1.3 individuals/km², 95% CI = 2,278-4,201).     

Maximum likelihood procedure adapted to sampling schemes

This paper considers a maximum likelihood procedure for the data obtained by sampling surveys such as stratified sampling and two-stage sampling. We evaluate the variance of the estimators and the distribution of the log-likelihood ratio statistic.     

Social Capital and Mental Health among Brazilian Immigrants in Japan

This study investigates the effect of social capital on the psychological well-being of Brazilian immigrants in Japan. Social capital in immigrants has drawn considerable attention from sociologists and other social scientists because many advanced countries have accepted a large number of immigrants from other countries. Previous studies of immigration in the US have emphasized the important role of bonding social capital with family and co-ethnic friends in helping immigrants obtain social and emotional support from others. Conversely, other studies of immigration in European countries have suggested that bonding social capital with co-ethnic members does not necessarily lead to better outcomes. These contrasting findings demonstrate that social capital is largely embedded in the institutional settings within which immigrants deploy it. In this study, we explored how the psychological well-being of Brazilian immigrants in Japan depended on different forms of social capital. The results indicate that despite the lack of economic resources in their ethnic communities, Brazilian immigrants benefited significantly from bonding social capital with their extended families in terms of improved mental health. This study suggests that the effectiveness of bonding social capital substantially differs in terms of the objective and subjective realities of immigrants.     

Labor Market Institutions and Job Mobility in Asian Societies: A Comparative Study of Japan and Taiwan

In this article we focus on job mobility patterns in Japan and Taiwan, exploring how local institutional settings are linked to patterns of job mobility. Previous studies have distinguished between involuntary and voluntary job mobility. However, more diverse patterns of job mobility may also exist, which are not captured by this dichotomy. In this study we used representative national survey data from Japan and Taiwan and analyzed five types of job turnover: involuntary, positive voluntary, negative voluntary, family related and other. Using event history models we found significant differences between the two societies. First, the effect of higher education on voluntary job mobility was weaker in Japan than in Taiwan. Second, the effect of organizational size on voluntary job mobility was stronger in Japan than in Taiwan. Third, these tendencies were more significant for men than for women. These results suggest that the local institutional filters affect the turnover process.     

Intergenerational Mobility in East Asian Countries: A Comparative Study of Japan, Korea and China

Abstract:  There have been fewer cross-national comparative works on social mobility in East Asian countries than in Western countries. The present study aims to explore the similarities and differences of intergenerational social mobility in three East Asian countries and to examine whether the Featherman–Jones–Hauser (FJH) hypothesis would fit well into the mobility tables for Japan, Korea, and China. Log-linear and log-multiplicative models are applied to the mobility tables of respondents' occupations according to the father's occupation in the three countries. The analysis of relative rates of mobility did not completely support the FJH hypothesis in a strict sense, even though it reasonably accounts for the total association of origin and destination in the three countries. My analysis demonstrates that a level of social fluidity has been higher in Korea and China than in Japan. Focusing on how relative mobility patterns differ between the three countries, intergenerational mobility in Korea is characterized by lower rates of class inheritance compared to Japan, while there seems to be a similarity between the patterns of social fluidity in Japan and Korea, even though they are to a certain extent deviant from Erikson and Goldthorpe's core model. In contrast to Korea, class inheritance rates in China are almost as large as in Japan. However, the mobility pattern between classes appears to differ substantially between the post-socialist and two capitalist countries. In particular, both downward and upward mobility between the white collar bloc and the unskilled manual position are more pervasive in China than in Japan and Korea. These results imply that sociologists interested in cross-national comparison of the social mobility between the East Asian countries should pay attention to both political institutions and the local labor market situatuion which can substantially affect social mobility.