More than a million foreigners reportedly reside in South Korea now, with unskilled migrant workers accounting for a majority. Although the country's reliance on imported foreign labor is likely to continue unabated, the country prides itself as an ethnically homogenous society and insists on almost zero-immigration policy. However, this paper shows that Korean society is rapidly becoming a multicultural society and this process is inevitable and irreversible. In support of this argument, the paper examines various social factors that are contributing to the making of a multiethnic Korea, including the continuing influx of migrant workers, rapid aging of the population, low fertility rate, and shortage of brides. The paper also assesses the applicability of various theories and trends of migration to the Korean context. The Korean case suggests a need for a paradigm shift in understanding multiculturalism. This is because the dominant perspectives and theories on multiculturalism have been western-centric, based on western experience and focusing on racial differences and tensions. Multiculturalism in Korea as well as in its neighboring countries like China, Japan, and Taiwan is fundamentally different, as it involves people of similar physical appearances and historical cultural bonds, and it entails ethnic rather than racial differences.

Bilingualism delays the onset of dementia symptoms and contributes to cognitive reserve. However, the neural basis of this mechanism remains elusive. The few studies that have investigated neural mechanisms of cognitive reserve and bilingualism have focused on Alzheimer’s disease. This study investigated the neural basis of cognitive reserve among persons with frontotemporal dementia (FTD) using regional brain volumes. Sixty-eight persons with FTD (42 bilinguals and 26 monolinguals) were included. After propensity score matching for age, sex, education, FTD subtype and clinical severity, there were 26 bilinguals and 26 monolinguals. The results showed that bilinguals had reduced thalamic volume compared to monolinguals despite having similar cognitive performance. The results indicate that bilinguals were able to tolerate more severe atrophy compared to monolinguals while maintaining comparable cognitive abilities. Our study therefore suggests that bilingualism contributes to cognitive reserve in persons with FTD.

We conducted a detailed linguistic analysis of Oral Proficiency Interviews (OPIs) from older Spanish-English bilinguals (n = 28) to determine which cognitive, linguistic, and demographic factors predict proficiency. In the dominant language, older age was associated with lower proficiency scores, but aging effects were not significant after accounting for cognitive functioning scores. In the nondominant language, bilinguals with larger vocabulary scores, fewer speech errors, and higher education levels obtained higher proficiency scores. Multiple linguistic submeasures from the OPIs were highly correlated across languages (e.g., fast speakers spoke fast in both languages), but these same measures exhibited significant language dominance effects (e.g., bilinguals spoke faster in the dominant than in the nondominant language). These results suggest it is critical to control for cognitive functioning when examining aging effects on language production, reveal powerful individual differences that affect how people talk regardless of language, and validate the use of the OPI to measure bilingual proficiency.

Japan is shrinking. Current projections indicate a population decrease of around one quarter by mid-century. Depopulation is potentially good news, providing opportunities for reconfiguring living conditions and alleviating human-environmental pressures. Nevertheless, ageing and depopulation have outcomes that require adjustment. One of these is spatial inequalities, which have been accelerating since the 1990s. Japan is the Asia-Pacific’s pioneer ageing and shrinking society. In East Asia both China and South Korea are ageing and expected to begin shrinking soon. Even high immigration Anglophone countries such as New Zealand are experiencing post-growth demographic processes at subnational level. Japan’s significance is in how adaptive responses there inform prospects for others as they experience their own post-growth pathways. This article presents case studies of Sado Island in Japan and New Zealand’s South Island in a comparative qualitative analysis of rural agency under population decline. Overall, I contend there is potential for benefitting from demographic shrinkage - what I term a ‘depopulation dividend’ - and for rural regions in the Asia-Pacific to progress towards a sustainable post-growth economy and society.

The ability to understand and speak more than one language (i.e., bilingualism) may provide benefits to preserving social cognition against normal age-related deteriorations. This study examined how variations in bilingual language experience influence theory-of-mind (ToM) understanding in late adulthood. One hundred and five cognitively healthy older adults (Mage = 66.23 years, range = 56–79) and 80 young adults (Mage = 22.03 years, range = 19–30), who were bilingual speakers, completed a ToM task battery, a self-report questionnaire on their language background, and a battery of general cognition assessments. We found an overall age-related decline in ToM, where older adults made more errors in inferring others’ mental states compared with young adults. Importantly, an earlier L2 age of acquisition (L2AoA) predicted better ToM performance among older adults, over and above the effects of age, education, and general cognition. The results suggest that early bilingual acquisition may enhance social cognitive processes during development and contribute to intact ToM abilities in older adult bilinguals.

Cumulative exposure to anticholinergic and sedative medications has been associated with worsening physical function in older adults. We evaluated the feasibility of measuring physical function using wearable devices and explored the impact of reducing the anticholinergic and sedative medication burden in a pilot study of community-dwelling adults aged 60 years and older. Evaluations included the 10-meter walk test (10MWT), the Short Physical Performance Battery (SPPB), and the mini-BESTest. Two participants/month were recruited in one clinic in 2022. The five participants had a median age of 67, a median DBI of 1.7, and four were female. The feasibility analysis showed that the 10MWT and SPPB tests were completed on 12/12, and the mini-BESTest on 11/12. An exploratory analysis showed clinically meaningful improvements in gait speed (mean +0.18 m/s) and SPPB (mean +2.2 points). We showed the feasibility of measuring physical function by wearable devices during deprescribing of anticholinergic and sedative medications.