Many studies of postwar Japan have emphasized that an ideology of ethnic homogeneity has been an important element in Japanese society since 1945. Oguma and others have argued that this ideology contrasts with the view of a multi-ethnic empire that was prevalent prior to 1945. It has been widely proposed, we believe correctly, that this ideology of ethnic homogeneity —the idea of the tan'itsu minzoku —has been used by political and business elites to weaken class unity and to exacerbate other divisions among working people. The term “cultural nationalism” probably best encapsulates this ideology. A vast pseudo-scientific literature known as Nihonjinron (literally “theories of Japanese(ness)”) has grown up in support of this cultural nationalism and has in turn been widely critiqued, both in Japanese and in English.

For almost a century after E.S. Morse's 1877 excavations at Ōmori shell mound demonstrated the existence of a Stone Age culture in the archipelago, it was generally accepted that the Japanese people dated back only to the Yayoi period, the time when wet-rice farming was introduced from the continent. The Stone Age was associated with pre-Japanese peoples such as the Ainu. By the 1980s, however, the idea that the Stone Age Jōmon period formed a key component in Japanese culture became widely accepted in both academia and the popular imagination. ‘Jōmon’ became a household word for the first time. This essay uses recent interdisciplinary work in archaeology, linguistics and genetics to re-evaluate the contribution of the Jōmon to Japan. New genetic research has started to find significant Jōmon ancestry in ancient Korea, showing that Jōmon genomes were not limited to the Japanese archipelago. DNA studies have also concluded that Yayoi, Kofun and modern ‘mainland’ Japanese populations derive only around 10% of their ancestry from the Jōmon, a figure which rises to 25% for early modern and contemporary Okinawans. Such figures are comparable to reported levels of hunter-gatherer ancestry found in many European countries. Linguistically, with the exception of Ainuic in the north, Jōmon languages were replaced by the incoming Japonic family with, at best, limited borrowing. The idea that Jōmon culture has been a dominant factor in shaping modern Japan also requires reconsideration. Many ‘Jōmony’ traits in historic Japan reflect ecological constraints—there are only so many ways to eat an acorn. Other such traits can be seen as part of a transcultural strategic resistance to Japan rather than as unchanging tradition. While the Jōmon has proven a fecund source of ideology in post war Japan, its actual contribution to historic Japanese civilisation has been small. This conclusion requires a reevaluation of why the Ainu in Hokkaido were not absorbed in the same way as Jōmon cultures elsewhere and why they went on to make such an important contribution to the history of the northern archipelago.

As an important component of prehistoric subsistence, an understanding of bone-working is essential for interpreting the evolution of early complex societies, yet worked bones are rarely systematically collected in China. Here, the authors apply multiple analytical methods to worked bones from the Longshan site of Pingliangtai, in central China, showing that Neolithic bone-working in this area, with cervid as the main raw material, was mature but localised, household-based and self-sufficient. The introduction of cattle in the Late Neolithic precipitated a shift in bone-working traditions but it was only later, in the Bronze Age, that cattle bones were utilised in a specialised fashion and dedicated bone-working industries emerged in urban centres.

Innovations in horse equipment during the early Middle Ages provided advantages to societies from the steppes, reshaping the social landscape of Eurasia. Comparatively little is known about the precise origin of these crucial advances, although the available evidence points to early adoption in East Asia. The authors present new archaeological discoveries from western and northern Mongolia, dating to the fourth and fifth centuries AD, including a wooden frame saddle with horse hide components from Urd Ulaan Uneet and an iron stirrup from Khukh Nuur. Together, these finds suggest that Mongolian groups were early adopters of stirrups and saddles, facilitating the expansion of nomadic hegemony across Eurasia and shaping the conduct of medieval mounted warfare.

The Buffalo National River in northwest Arkansas preserves an extensive Quaternary record of fluvial bedrock incision and aggradation across lithologies of variable resistance. In this work, we apply optically stimulated luminescence (OSL) dating to strath and fill terraces along the Buffalo River to elucidate the role of lithology and climate on the development of the two youngest terrace units (Qtm and Qty). Our OSL ages suggest a minimum strath planation age of ca. 250 ka for the Qtm terraces followed by a ca. 200 ka record of aggradation. Qtm incision likely occurred near the last glacial maximum (LGM), prior to the onset of Qty fill terrace aggradation ca. 14 ka. Our terrace ages are broadly consistent with other regional terrace records, and comparison with available paleoclimatic archives suggests that terrace aggradation and incision occurred during drier and wetter hydrological conditions, respectively. Vertical bedrock incision rates were also calculated using OSL-derived estimates of Qtm strath planation and displayed statistically significant spatial variability with bedrock lithology, ranging from ~35 mm/ka in the higher resistance reaches and ~16 mm/ka in the lower resistance reaches. In combination with observations of valley width and terrace distribution, these results suggest that vertical processes outpace lateral ones in lithologic reaches with higher resistance.

Hunter–gatherer occupations of small islands are rare in world prehistory and it is widely accepted that island settlement is facilitated by agriculture. The Ryukyu Islands contradict that understanding on two counts: not only did they have a long history of hunter–gatherer settlement, but they also have a very late date for the onset of agriculture, which only reached the archipelago between the eighth and thirteenth centuries AD. Here, we combine archaeology and linguistics to propose a tripartite model for the spread of agriculture and Ryukyuan languages to the Ryukyu Islands. Employing demographic growth, trade/piracy and the political influence of neighbouring states, this model provides a synthetic yet flexible understanding of farming/language dispersals in the Ryukyus within the complex historical background of medieval East Asia.

Colleges and universities around the world engaged diverse strategies during the COVID-19 pandemic. Baylor University, a community of ˜22,700 individuals, was 1 of the institutions which resumed and sustained operations. The key strategy was establishment of multidisciplinary teams to develop mitigation strategies and priority areas for action. This population-based team approach along with implementation of a “Swiss Cheese” risk mitigation model allowed small clusters to be rapidly addressed through testing, surveillance, tracing, isolation, and quarantine. These efforts were supported by health protocols including face coverings, social distancing, and compliance monitoring. As a result, activities were sustained from August 1 to December 8, 2020. There were 62,970 COVID-19 tests conducted with 1435 people testing positive for a positivity rate of 2.28%. A total of 1670 COVID-19 cases were identified with 235 self-reports. The mean number of tests per week was 3500 with approximately 80 of these positive (11/d). More than 60 student tracers were trained with over 120 personnel available to contact trace, at a ratio of 1 per 400 university members. The successes and lessons learned provide a framework and pathway for similar institutions to mitigate the ongoing impacts of COVID-19 and sustain operations during a global pandemic.

“Flipped learning” has become increasingly popular in medical education as a means of developing independent learning skills in students. The article by Zheng at al. (2020) highlights the potential utility of this approach in disaster triage training. However, the article also highlights to us some concerns regarding how “flipped learning” may favor certain learners over others in the provision of disaster triage education. Specifically, the article demonstrates the necessity for increased preclassroom preparation when a “flipped classroom” model is used, which inevitably privileges those with a higher ability to engage with self-directed learning. Although such a skill is important to develop in medical education, we fear it may lead to polarized student attainment rather than ensuring a maximum number of students achieve the requisite standard required. More research is consequently needed to inform the most efficacious means of facilitating disaster triage training that supports all students sufficiently, while also helping to nurture their independent learning skills.

While earlier research often saw Altaic as an exception to the farming/language dispersal hypothesis, recent work on millet cultivation in northeast China has led to the proposal that the West Liao basin was the Neolithic homeland of a Transeurasian language family. Here, we examine the archaeolinguistic evidence used to associate millet farming dispersals with Proto-Macro-Koreanic, analysing the identification of population movements in the archaeological record, the role of small-scale cultivation in language dispersals, and Middle–Late Neolithic demography. We conclude that the archaeological evidence is consistent with the arrival and spread of Proto-Macro-Koreanic on the peninsula in association with millet cultivation in the Middle Neolithic. This dispersal of Proto-Macro-Koreanic occurred before an apparent population crash after 3000 BC, which can probably be linked with a Late Neolithic decline affecting many regions across northern Eurasia. We suggest plague (Yersinia pestis) as one possible cause of an apparently simultaneous population decline in Korea and Japan.