National Museum of Japanese History

Sakura, Japan

National Museum of Japanese History

Sakura, Japan

Time filter

Source Type

van der Plicht J.,University of Groningen | van der Plicht J.,Leiden University | Imamura M.,National Museum of Japanese History | Sakamoto M.,National Museum of Japanese History
Radiocarbon | Year: 2012

We have radiocarbon dated series of tree rings from 2 fossil trees (named ND-113 and the Fuji tree) buried in fossil volcanic avalanche deposits in Japan. They are dendrochronologically floating, dating beyond the tree-ring part of the 14C calibration curve. The trees show about 350 and 400 annual rings, respectively, which are dated in intervals of 2 to 10 yr. Both sequences are wiggle-matched to the calibration curve IntCal09. This resulted in an age range of 16,534-16,204 cal BP for ND-113, and 23,678-23,290 cal BP for the Fuji tree. © 2012 by the Arizona Board of Regents on behalf of the University of Arizona.


Baba K.,Chiba University | Takano R.,Chiba University | Inoue S.,Mitsubishi Group | Miyata K.,National Museum of Japanese History | Tsumura N.,Chiba University
Final Program and Proceedings - IS and T/SID Color Imaging Conference | Year: 2012

We present a method to simulate paper gloss by using Point Spread Function of Specular Reflection (SR-PSF). The SR-PSF is defined as an impulse response of specular reflection that is distribution of light intensity reflected from microscopic facet on the surface of paper. The paper gloss is a combined phenomenon between the specular reflections from microscopic facet and macroscopic facet of paper. In this study, we measure the SR-PSFs of paper samples that have different levels of specular gloss placed on a flat sample holder. Simulations for gloss of curved paper sample are done by transforming the measured SR-PSFs as a function of angle of macroscopic facet. In the simulation, we convolve the transformed SR-PSFs with an image of a light source reflected on a cylindrically-curved specular object. Then we add the convolved light source image to an image of a sample paper placed on the curved object. The image of the sample paper is taken with polarizing filter to remove the gloss of the paper. Our results show that the gloss of the curved paper samples can be simulated depending on the specular gloss with the SR-PSF. © 2012 Society for Imaging Science and Technology.


Miyata K.,National Museum of Japanese History | Tsumura N.,Chiba University
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2012

In this paper, we introduce a concept of the image quality metamerism as an expanded version of the metamerism defined in the color science. The concept is used to unify different image quality attributes, and applied to introduce a metric showing the degree of image quality metamerism to analyze a cultural property. Our global goal is to build a metric to evaluate total quality of images acquired by different imaging systems and observed under different viewing conditions. As the basic step to the global goal, the metric is consisted of color, spectral and texture information in this research, and applied to detect image quality metamers to investigate the cultural property. The property investigated is the oldest extant version of folding screen paintings that depict the thriving city of Kyoto designated as a nationally important cultural property in Japan. Gold colored areas painted by using high granularity colorants compared with other color areas in the property are evaluated based on the metric, then the metric is visualized as a map showing the possibility of the image quality metamer to the reference pixel. © 2012 SPIE-IS&T.


PubMed | Tohoku University, Yamaguchi University, University of Bristol, National Museum of Japanese History and Okayama University
Type: Historical Article | Journal: Biology letters | Year: 2016

Whether man is predisposed to lethal violence, ranging from homicide to warfare, and how that may have impacted human evolution, are among the most controversial topics of debate on human evolution. Although recent studies on the evolution of warfare have been based on various archaeological and ethnographic data, they have reported mixed results: it is unclear whether or not warfare among prehistoric hunter-gatherers was common enough to be a component of human nature and a selective pressure for the evolution of human behaviour. This paper reports the mortality attributable to violence, and the spatio-temporal pattern of violence thus shown among ancient hunter-gatherers using skeletal evidence in prehistoric Japan (the Jomon period: 13 000 cal BC-800 cal BC). Our results suggest that the mortality due to violence was low and spatio-temporally highly restricted in the Jomon period, which implies that violence including warfare in prehistoric Japan was not common.


Sakamoto A.,Saitama University | Ochiai S.,S.T. Japan Inc. | Higashiyama H.,S.T. Japan Inc. | Masutani K.,S.T. Japan Inc. | And 3 more authors.
Journal of Raman Spectroscopy | Year: 2012

Raman spectroscopic studies of a few Japanese art objects have been performed by using a portable Raman spectrometer constructed with liquid crystal tunable filters as dispersive elements. Interesting information has been obtained from the Raman spectra observed from ukiyo-e's (Japanese woodblock prints) and their woodblocks. The performance data and the imaging capabilities of the constructed spectrometer are presented. Copyright © 2011 John Wiley & Sons, Ltd.


Noshiro S.,Japan Forestry and Forest Products Research Institute | Kudo Y.,National Museum of Japanese History | Sasaski Y.,Paleo Labo Co.
Quaternary International | Year: 2016

In Japan plant remains excavated from lowland sites have revealed that people managed and used plant resources, especially arboreal ones, around settlements since the early Jomon period starting at ca. 7000 cal yr BP. This management of arboreal resources mainly consisted of management and use of native Castanea crenata (chestnut) and introduced Toxicodendron vernicifluum (lacquer tree) resources. At present this management system seems to have been established suddenly at the beginning of the early Jomon period. This is partly due to the paucity of sites of the preceding incipient and initial Jomon periods that yielded plant materials. Even in these periods, however, people must have used and did some kind of management of plant resources, because the management system appearing in the early Jomon period seems to be too sophisticated to appear suddenly and includes various introduced plants beside the lacquer tree. To clarify the human-plant relationship during the incipient and initial Jomon periods, we reviewed the studies on plant remains carried out in central to northeastern Japan. Based on the collected materials, we discussed change in the human-plant relationship from the incipient and initial to the early Jomon periods from three points, change in the availability of Castanea crenata resources, change in people's mobility and sedentism, and submergence of sites in relation to the late Glacial to the early Holocene transgression. © 2016 Elsevier Ltd and INQUA.


Kudo Y.,National Museum of Japanese History | Kumon F.,Shinshu University
Quaternary International | Year: 2012

The pattern of latest Pleistocene climate changes reconstructed on the basis of sediment cores from Lake Nojiri is one of the most detailed and reliable reconstructions in Japan. The climate changes over the last 72ka can be compared directly with those recorded at Upper Paleolithic and Incipient Jomon sites on the basis of a revised age model for the Lake Nojiri sediment cores and the revised 14C dates, calibrated after IntCal09. Fossil bones of megafauna from the Tategahana site beside the lake have been placed ca. 53-37ka cal BP, in the relatively warm, temperate climate of the early MIS 3. Part of the Tategahana site was interpreted as a kill and butchery site, although the presence of the "big game hunters" is still uncertain, as so far there is no reliable archaeological evidence in the Japanese archipelago dating back to the Middle Paleolithic. The number of Paleolithic sites increased suddenly after 38ka cal BP around Lake Nojiri. This seems to coincide with the timing of the migration of Homo sapiens into the Japanese archipelago. The climate had been gradually cooling toward the Last Glacial Maximum (LGM). However, the area around Lake Nojiri in the late MIS 3 seems to have been a suitable place for the subsistence of hunter-gatherers. Backed blade industries (ca. 29-20ka cal BP), point-tool industries (ca. 22-19ka cal BP), and microblade industries (20-16ka cal BP) were characteristic of the Late Upper Paleolithic. The number of sites around Lake Nojiri decreased significantly during the LGM. At the end of the LGM, an abrupt change of vegetation, from subarctic conifer forest to deciduous broadleaf forest, had occurred around 14ka, and human activities became prominent around Lake Nojiri, as shown by the linear-relief pottery group (ca. 15-13ka cal BP). The number of sites seems to have decreased slightly during the Younger Dyras cooling event. Patterns of human occupation around Lake Nojiri show the influence of global and local climate changes. © 2011 Elsevier Ltd and INQUA.


Shimaoka A.,University of Tokyo | Imamura M.,National Museum of Japanese History | Kaneoka I.,University of Tokyo
Chemical Geology | Year: 2016

We present beryllium (Be) isotopic ratios (10Be/9Be) for 55 volcanic rocks from 21 Quaternary volcanoes in the northeast Japan arc, including the Hokkaido and central Japan areas (the NEJH). Although Be isotopic ratios in these rocks are much lower than in other arcs reported in the literature, they are much higher than in control samples (ocean island basalt (OIB) and Tertiary basalts) that have no recent addition of 10Be. Hence, our results indicate the incorporation of a component derived from subducted sediments in the Japan arc magmas. Two kinds of Be isotopic variations were observed in the NEJH: 1) variations among lava flows of different ages in the same volcano; and 2) variations among volcanoes in an along-arc or cross-arc direction. In the first case, there are no apparent differences in Be isotopic ratios for lavas of the same age, but relatively large variations among lavas of different ages, and the degree of variation depends on the regional characteristics, indicating that regional differences in near-surface conditions may affect these Be isotopic variations. In the second case, the progressive decrease in Be isotopic ratios in a cross-arc direction suggests the continuous incorporation of subducted sediment, even in the back-arc region. The regional along-arc Be isotopic variations reflect not only the incorporation of sediments into the arc magma, but also regional tectonic and/or geological and geochemical processes. This is the first systematic study of Be isotopic systems in the NE Japan arc, and we provide direct evidence for the incorporation of sedimentary components from the subducting slab into the arc magma, including in the back-arc region at 300 km from the volcanic front, where the Wadati–Benioff Zone is at a depth of 290 km. © 2016 Elsevier B.V.


Miyata K.,National Museum of Japanese History | Shiroishi R.,Ochanomizu University | Inoue Y.,Bunkyo University
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2011

In this research, an AR (augmented reality) technology with projector-camera system is proposed for a history museum to provide user-friendly interface and pseudo hands-on exhibition. The proposed system is a desktop application and designed for old Japanese coins to enhance the visitors' interests and motivation to investigate them. The size of the old coins are small to recognize their features and the surface of the coins has fine structures on both sides, so it is meaningful to show the reverse side and enlarged image of the coins to the visitors for enhancing their interest and motivation. The image of the reverse side of the coins is displayed based on the AR technology to reverse the AR marker by the user. The information to augment the coins is projected by using a data projector, and the information is placed nearby the coins. The proposed system contributes to develop an exhibition method based on the combinations of the real artifacts and the AR technology, and demonstrated the flexibility and capability to offer background information relating to the old Japanese coins. However, the accuracy of the detection and tracking of the markers and visitor evaluation survey are required to improve the effectiveness of the system. © 2010 Copyright SPIE - The International Society for Optical Engineering.


Hamagami T.,Yokohama National University | Sawada K.,National Museum of Japanese History
IEEJ Transactions on Electronics, Information and Systems | Year: 2014

Study of heritage database and historical archive become an active area in multidisciplinary fields. The huge and high dimensional content is a sort of big data consisting of various kinds of information elements, and has valuable knowledge and the wisdom of mankind. This study focuses on Kosode Byobu collection which is antique fine art in Edo era. By analyzing high-resolution digital images of them and extracting knowledge structure by machine learning, we apply it for intelligent display and research of the art. This article introduces the background of the project and shows fundamental approach for tackling to retrieving intelligent structure and developing effective display technique. © 2014 The Institute of Electrical Engineers of Japan.

Loading National Museum of Japanese History collaborators
Loading National Museum of Japanese History collaborators