Joichi Oyamada
Biographic Data
| ID | 80281 |
|---|---|
| NAME | Joichi Oyamada |
| GIVEN NAMES | Joichi |
| FAMILY NAME | Oyamada |
| SIGNATURE | OYAMADA J |
| AFFILIATIONS | Nagasaki University |
| VERIFIED | No |
| TOTAL WORKS | 16 |
| TOTAL CITATIONS | 101 |
| AUTHOR COUNT | 16 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 1992 |
| LATEST PUBLICATION YEAR | 2018 |
| H-INDEX | 8 |
People of the Samurai Class Kept their Antemortem Lost Teeth
Three hundred and fifty-seven skeletons were excavated from the old site of the Sougenji temple in Kitakyushu City, Fuknoka Prefecture, Japan, in 1992. These skeletons were remains of the samurai class and had been buried during the seventeenth or eighteenth century (Edo period). To clarify samurai dental habits, we examined their teeth and alveolar condition. Alveoli could be detected at least partly in 141 skeletons. Detailed examination reveal…
Sex differences in linear enamel hypoplasia (LEH) in early modern Japan
In Japan's early modern period (1603–1867), also known as the Edo period, females were considered inferior to males. It is therefore plausible that boys were raised more solicitously than girls, and that girls were subject to various kinds of deprivation in early childhood. We compared the prevalence of linear enamel hypoplasia (LEH) in the dentition of the skeletal remains of early modern Japanese samurai and commoners interred in an urban locat…
Nonmetric dental characteristics of the early modern population of Okinawa Island in Nansei Islands, Japan
Dental morphological characteristics of the early modern population (c. 17–19th century AD) of Okinawa Island, Nansei Islands, were investigated to clarify their genealogical characteristics. We observed and classified 25 nonmetric traits of tooth crowns and roots from human remains (106 individuals) excavated from tombs of the early modern period in Okuma, Ginowan City, Okinawa. The incidences of these traits were compared with the incidences in…
Preliminary analysis of regional differences in dental pathology of early modern commoners in Japan
The family register system used by the Tokugawa shogunate limited the ability of commoners to move freely from one location to another. It is thought that such restrictions on movement resulted in regional differences in lifestyle, including diet, arising from regional environmental differences. It is also likely that regional differences in lifestyle resulted in regional differences in health status, including oral health. In the present study, …
Population history of the northern and central Nansei Islands (Ryukyu island arc) based on dental morphological variations: Gene flow from North Kyushu to Nansei Islands
This study investigates dental morphological variations among the modern inhabitants of Tanegashima Island and Okinawa Main Island of the Nansei Islands (Ryukyu island arc), which is the southern gateway of the Japanese archipelago. Temporal variations within Tanegashima Island and regional variations of the northern half of the Nansei Islands were used to study population history. The late Aeneolithic Yayoi to protohistoric Kofun populations (c.…
Pathology of deciduous teeth in the samurai and commoner children of early modern Japan
The strict class system in place during the Edo (early modern) period in Japan is thought to have encompassed customs that differed between the samurai (ruling class) and commoners. This study found that in samurai children, deciduous caries occurred only in maxillary incisors at 0.5–2 years of age and did not occur in the mandibular incisors and canines at 3–5 years of age. Conversely, in commoner children, deciduous caries occurred in all maxil…
Low AMTL ratios in medieval Japanese dentition excavated from the Yuigahama-minami site in Kamakura
Ante-mortem tooth loss (AMTL) in a medieval Japanese ‘Yuigahama-minami’ population excavated at Kamakura, Kanagawa prefecture, was examined. In the medieval period, Minamoto Yoritomo established the shogunate in Kamakura, and many battles were fought around Kamakura. Human skeletons from the medieval sites in Kamakura are considered to be casualties of these battles. The AMTL ratio in Kamakura medieval skeletons, as reported in previous work, is …
A possible case of prophylactic supra-inion trepanation in a child cranium with an auditory deformity (pre-Columbian Ancon site, Peru)
We had the opportunity to examine a pre-Columbian Peruvian child (about 4–5 years old) cranium with a healed lesion above the inion on the occiput. It has previously been claimed that supra-inion lesions represent traces of prehistoric trepanation for ritual or prophylactic reasons in childhood, a practice termed ‘trepanation supra-iniana’. An alternative hypothesis claimed that such lesions mainly result from abnormal long-term compression cause…
Dental pathology in the samurai and commoners of early modern Japan
The class system in place during the Edo (early modern) period in Japan is thought to have included a range of customs that differed between the samurai (ruling class) and commoners. The incidence of caries in the dentition of the samurai was significantly lower than that of commoners. This difference is considered to be due to diet, eating frequency, and tooth care. As to location of the caries, it was found that the incidence of root caries in …
The Relationship between Immigration and the Prevalence of Dental Caries in the Yayoi People
Skeletal remains of the Yayoi people, who had been excavated from Northern Kyushu and Yamaguchi Prefecture in Japan, are thought to be largely the descendants of continental immigrants. Carious ratios of the Yayoi people are higher than those of the Jomon people and their descendants. Results of the present study showed that, in frequency of carious lesions and in state of dental attrition, the Yayoi people of the Northern Kyushu and Yamaguchi re…
Dental morphology of the Dawenkou Neolithic population in North China: Implications for the origin and distribution of Sinodonty
Japanese Deciduous Tooth Size: Past and Present
Deciduous tooth crown measurements were investigated among the inhabitants of the Japanese islands over the past 4000 years. Mesiodistal and buccolingual crown diameters were measured in Neolithic Jomon, Aeneolithic Yayoi (divided into the samples from Tanegashima island and from other western Japanese sites), protohistoric Kofun, medieval, early modern Edo, modern Japanese and early modern Sakhalin Ainu samples. Overall deciduous tooth size decr…
Dental Morbid Condition of Hunter-Gatherers on Okinawa Island during the Middle Period of the Prehistoric Shell Midden Culture and of Agriculturalists in Northern Kyushu during the Yayoi Period
Based on morphological data from bones and teeth, Yayoi people in northern Kyushu are thought to have been immigrants or their descendants. They or their ascendants are thought to have introduced agriculture, especially rice growing to Japan. During the middle period of the prehistoric shell midden culture on Okinawa island, equivalent to the latest Jomon and early Yayoi period, the subsistence of Okinawa islander is thought to have been hunting …
Deciduous dental morphology of the prehistoric Jomon people of Japan: Comparison of nonmetric characters
Morphological variations of the deciduous dentition are as useful as those of the permanent dentition for determining the biological affinities of human populations. This paper provides material on morphological variations of deciduous teeth of the prehistoric Japanese population from the Late and the Latest Jomon Period (ca. 2000–ca. 300 B.C.). The expression of nonmetric traits of the deciduous teeth in the Jomon sample shows a closer affinity …
Tooth Size of the Protohistoric Kofun People in Southern Kyushu, Japan
Metrical dental characteristics were investigated in the Kofun series in southern Kyushu. The results of t-tests and Penrose's size distances showed that tooth size in the Kofun series in southern Kyushu was larger than those of the Jomon series and the Yayoi series in northwestern Kyushu, except for the buccolingual diameters in males of the Yayoi series, which were almost equal in size, although smaller than that of the Yayoi series in northern…
Tooth Crown Size of Yayoi People in the North-West and the North of Kyushu
骨形態学的には西北九州弥生人は縄文人の直系であり,北部九州弥生人には渡来人の影響があったとされている。歯ではC. L. BRACEらが北部九州弥生人の歯が縄文人よりも大きいことを明らかにしている。本研究では縄文人,西北および北部九州弥生人の歯冠計測を行い比較検討した。その結果,北部九州弥生人が縄文人および西北九州弥生人に対して大きな歯を持ち,縄文人と西北九州弥生人との間にはほとんど有意差がなかった。先の3集団に現代人資料を加えた4集団に関してペンローズの距離分析を行ったところ,縄文人と西北九州弥生人,北部九州弥生人と現代人の2つのグループに分かれ,前者は後者に対して相対的に小さな歯を持っていた
Dental pathology in the samurai and commoners of early modern Japan
The class system in place during the Edo (early modern) period in Japan is thought to have included a range of customs that differed between the samurai (ruling class) and commoners. The incidence of caries in the dentition of the samurai was significantly lower than that of commoners. This difference is considered to be due to diet, eating frequency, and tooth care. As to location of the caries, it was found that the incidence of root caries in …
Dental Morbid Condition of Hunter-Gatherers on Okinawa Island during the Middle Period of the Prehistoric Shell Midden Culture and of Agriculturalists in Northern Kyushu during the Yayoi Period
Based on morphological data from bones and teeth, Yayoi people in northern Kyushu are thought to have been immigrants or their descendants. They or their ascendants are thought to have introduced agriculture, especially rice growing to Japan. During the middle period of the prehistoric shell midden culture on Okinawa island, equivalent to the latest Jomon and early Yayoi period, the subsistence of Okinawa islander is thought to have been hunting …
The Relationship between Immigration and the Prevalence of Dental Caries in the Yayoi People
Skeletal remains of the Yayoi people, who had been excavated from Northern Kyushu and Yamaguchi Prefecture in Japan, are thought to be largely the descendants of continental immigrants. Carious ratios of the Yayoi people are higher than those of the Jomon people and their descendants. Results of the present study showed that, in frequency of carious lesions and in state of dental attrition, the Yayoi people of the Northern Kyushu and Yamaguchi re…
Pathology of deciduous teeth in the samurai and commoner children of early modern Japan
The strict class system in place during the Edo (early modern) period in Japan is thought to have encompassed customs that differed between the samurai (ruling class) and commoners. This study found that in samurai children, deciduous caries occurred only in maxillary incisors at 0.5–2 years of age and did not occur in the mandibular incisors and canines at 3–5 years of age. Conversely, in commoner children, deciduous caries occurred in all maxil…
Deciduous dental morphology of the prehistoric Jomon people of Japan: Comparison of nonmetric characters
Morphological variations of the deciduous dentition are as useful as those of the permanent dentition for determining the biological affinities of human populations. This paper provides material on morphological variations of deciduous teeth of the prehistoric Japanese population from the Late and the Latest Jomon Period (ca. 2000–ca. 300 B.C.). The expression of nonmetric traits of the deciduous teeth in the Jomon sample shows a closer affinity …
Sex differences in linear enamel hypoplasia (LEH) in early modern Japan
In Japan's early modern period (1603–1867), also known as the Edo period, females were considered inferior to males. It is therefore plausible that boys were raised more solicitously than girls, and that girls were subject to various kinds of deprivation in early childhood. We compared the prevalence of linear enamel hypoplasia (LEH) in the dentition of the skeletal remains of early modern Japanese samurai and commoners interred in an urban locat…
Population history of the northern and central Nansei Islands (Ryukyu island arc) based on dental morphological variations: Gene flow from North Kyushu to Nansei Islands
This study investigates dental morphological variations among the modern inhabitants of Tanegashima Island and Okinawa Main Island of the Nansei Islands (Ryukyu island arc), which is the southern gateway of the Japanese archipelago. Temporal variations within Tanegashima Island and regional variations of the northern half of the Nansei Islands were used to study population history. The late Aeneolithic Yayoi to protohistoric Kofun populations (c.…
Japanese Deciduous Tooth Size: Past and Present
Deciduous tooth crown measurements were investigated among the inhabitants of the Japanese islands over the past 4000 years. Mesiodistal and buccolingual crown diameters were measured in Neolithic Jomon, Aeneolithic Yayoi (divided into the samples from Tanegashima island and from other western Japanese sites), protohistoric Kofun, medieval, early modern Edo, modern Japanese and early modern Sakhalin Ainu samples. Overall deciduous tooth size decr…
Preliminary analysis of regional differences in dental pathology of early modern commoners in Japan
The family register system used by the Tokugawa shogunate limited the ability of commoners to move freely from one location to another. It is thought that such restrictions on movement resulted in regional differences in lifestyle, including diet, arising from regional environmental differences. It is also likely that regional differences in lifestyle resulted in regional differences in health status, including oral health. In the present study, …
Low AMTL ratios in medieval Japanese dentition excavated from the Yuigahama-minami site in Kamakura
Ante-mortem tooth loss (AMTL) in a medieval Japanese ‘Yuigahama-minami’ population excavated at Kamakura, Kanagawa prefecture, was examined. In the medieval period, Minamoto Yoritomo established the shogunate in Kamakura, and many battles were fought around Kamakura. Human skeletons from the medieval sites in Kamakura are considered to be casualties of these battles. The AMTL ratio in Kamakura medieval skeletons, as reported in previous work, is …
Dental morphology of the Dawenkou Neolithic population in North China: Implications for the origin and distribution of Sinodonty
Tooth Size of the Protohistoric Kofun People in Southern Kyushu, Japan
Metrical dental characteristics were investigated in the Kofun series in southern Kyushu. The results of t-tests and Penrose's size distances showed that tooth size in the Kofun series in southern Kyushu was larger than those of the Jomon series and the Yayoi series in northwestern Kyushu, except for the buccolingual diameters in males of the Yayoi series, which were almost equal in size, although smaller than that of the Yayoi series in northern…
Nonmetric dental characteristics of the early modern population of Okinawa Island in Nansei Islands, Japan
Dental morphological characteristics of the early modern population (c. 17–19th century AD) of Okinawa Island, Nansei Islands, were investigated to clarify their genealogical characteristics. We observed and classified 25 nonmetric traits of tooth crowns and roots from human remains (106 individuals) excavated from tombs of the early modern period in Okuma, Ginowan City, Okinawa. The incidences of these traits were compared with the incidences in…
People of the Samurai Class Kept their Antemortem Lost Teeth
Three hundred and fifty-seven skeletons were excavated from the old site of the Sougenji temple in Kitakyushu City, Fuknoka Prefecture, Japan, in 1992. These skeletons were remains of the samurai class and had been buried during the seventeenth or eighteenth century (Edo period). To clarify samurai dental habits, we examined their teeth and alveolar condition. Alveoli could be detected at least partly in 141 skeletons. Detailed examination reveal…
A possible case of prophylactic supra-inion trepanation in a child cranium with an auditory deformity (pre-Columbian Ancon site, Peru)
We had the opportunity to examine a pre-Columbian Peruvian child (about 4–5 years old) cranium with a healed lesion above the inion on the occiput. It has previously been claimed that supra-inion lesions represent traces of prehistoric trepanation for ritual or prophylactic reasons in childhood, a practice termed ‘trepanation supra-iniana’. An alternative hypothesis claimed that such lesions mainly result from abnormal long-term compression cause…
Tooth Crown Size of Yayoi People in the North-West and the North of Kyushu
骨形態学的には西北九州弥生人は縄文人の直系であり,北部九州弥生人には渡来人の影響があったとされている。歯ではC. L. BRACEらが北部九州弥生人の歯が縄文人よりも大きいことを明らかにしている。本研究では縄文人,西北および北部九州弥生人の歯冠計測を行い比較検討した。その結果,北部九州弥生人が縄文人および西北九州弥生人に対して大きな歯を持ち,縄文人と西北九州弥生人との間にはほとんど有意差がなかった。先の3集団に現代人資料を加えた4集団に関してペンローズの距離分析を行ったところ,縄文人と西北九州弥生人,北部九州弥生人と現代人の2つのグループに分かれ,前者は後者に対して相対的に小さな歯を持っていた
Deciduous dental morphology of the prehistoric Jomon people of Japan: Comparison of nonmetric characters
Morphological variations of the deciduous dentition are as useful as those of the permanent dentition for determining the biological affinities of human populations. This paper provides material on morphological variations of deciduous teeth of the prehistoric Japanese population from the Late and the Latest Jomon Period (ca. 2000–ca. 300 B.C.). The expression of nonmetric traits of the deciduous teeth in the Jomon sample shows a closer affinity …
Tooth Size of the Protohistoric Kofun People in Southern Kyushu, Japan
Metrical dental characteristics were investigated in the Kofun series in southern Kyushu. The results of t-tests and Penrose's size distances showed that tooth size in the Kofun series in southern Kyushu was larger than those of the Jomon series and the Yayoi series in northwestern Kyushu, except for the buccolingual diameters in males of the Yayoi series, which were almost equal in size, although smaller than that of the Yayoi series in northern…
Dental Morbid Condition of Hunter-Gatherers on Okinawa Island during the Middle Period of the Prehistoric Shell Midden Culture and of Agriculturalists in Northern Kyushu during the Yayoi Period
Based on morphological data from bones and teeth, Yayoi people in northern Kyushu are thought to have been immigrants or their descendants. They or their ascendants are thought to have introduced agriculture, especially rice growing to Japan. During the middle period of the prehistoric shell midden culture on Okinawa island, equivalent to the latest Jomon and early Yayoi period, the subsistence of Okinawa islander is thought to have been hunting …
Japanese Deciduous Tooth Size: Past and Present
Deciduous tooth crown measurements were investigated among the inhabitants of the Japanese islands over the past 4000 years. Mesiodistal and buccolingual crown diameters were measured in Neolithic Jomon, Aeneolithic Yayoi (divided into the samples from Tanegashima island and from other western Japanese sites), protohistoric Kofun, medieval, early modern Edo, modern Japanese and early modern Sakhalin Ainu samples. Overall deciduous tooth size decr…
The Relationship between Immigration and the Prevalence of Dental Caries in the Yayoi People
Skeletal remains of the Yayoi people, who had been excavated from Northern Kyushu and Yamaguchi Prefecture in Japan, are thought to be largely the descendants of continental immigrants. Carious ratios of the Yayoi people are higher than those of the Jomon people and their descendants. Results of the present study showed that, in frequency of carious lesions and in state of dental attrition, the Yayoi people of the Northern Kyushu and Yamaguchi re…
Dental morphology of the Dawenkou Neolithic population in North China: Implications for the origin and distribution of Sinodonty
Dental pathology in the samurai and commoners of early modern Japan
The class system in place during the Edo (early modern) period in Japan is thought to have included a range of customs that differed between the samurai (ruling class) and commoners. The incidence of caries in the dentition of the samurai was significantly lower than that of commoners. This difference is considered to be due to diet, eating frequency, and tooth care. As to location of the caries, it was found that the incidence of root caries in …
Low AMTL ratios in medieval Japanese dentition excavated from the Yuigahama-minami site in Kamakura
Ante-mortem tooth loss (AMTL) in a medieval Japanese ‘Yuigahama-minami’ population excavated at Kamakura, Kanagawa prefecture, was examined. In the medieval period, Minamoto Yoritomo established the shogunate in Kamakura, and many battles were fought around Kamakura. Human skeletons from the medieval sites in Kamakura are considered to be casualties of these battles. The AMTL ratio in Kamakura medieval skeletons, as reported in previous work, is …
A possible case of prophylactic supra-inion trepanation in a child cranium with an auditory deformity (pre-Columbian Ancon site, Peru)
We had the opportunity to examine a pre-Columbian Peruvian child (about 4–5 years old) cranium with a healed lesion above the inion on the occiput. It has previously been claimed that supra-inion lesions represent traces of prehistoric trepanation for ritual or prophylactic reasons in childhood, a practice termed ‘trepanation supra-iniana’. An alternative hypothesis claimed that such lesions mainly result from abnormal long-term compression cause…
Population history of the northern and central Nansei Islands (Ryukyu island arc) based on dental morphological variations: Gene flow from North Kyushu to Nansei Islands
This study investigates dental morphological variations among the modern inhabitants of Tanegashima Island and Okinawa Main Island of the Nansei Islands (Ryukyu island arc), which is the southern gateway of the Japanese archipelago. Temporal variations within Tanegashima Island and regional variations of the northern half of the Nansei Islands were used to study population history. The late Aeneolithic Yayoi to protohistoric Kofun populations (c.…
Pathology of deciduous teeth in the samurai and commoner children of early modern Japan
The strict class system in place during the Edo (early modern) period in Japan is thought to have encompassed customs that differed between the samurai (ruling class) and commoners. This study found that in samurai children, deciduous caries occurred only in maxillary incisors at 0.5–2 years of age and did not occur in the mandibular incisors and canines at 3–5 years of age. Conversely, in commoner children, deciduous caries occurred in all maxil…
Preliminary analysis of regional differences in dental pathology of early modern commoners in Japan
The family register system used by the Tokugawa shogunate limited the ability of commoners to move freely from one location to another. It is thought that such restrictions on movement resulted in regional differences in lifestyle, including diet, arising from regional environmental differences. It is also likely that regional differences in lifestyle resulted in regional differences in health status, including oral health. In the present study, …
Nonmetric dental characteristics of the early modern population of Okinawa Island in Nansei Islands, Japan
Dental morphological characteristics of the early modern population (c. 17–19th century AD) of Okinawa Island, Nansei Islands, were investigated to clarify their genealogical characteristics. We observed and classified 25 nonmetric traits of tooth crowns and roots from human remains (106 individuals) excavated from tombs of the early modern period in Okuma, Ginowan City, Okinawa. The incidences of these traits were compared with the incidences in…
Sex differences in linear enamel hypoplasia (LEH) in early modern Japan
In Japan's early modern period (1603–1867), also known as the Edo period, females were considered inferior to males. It is therefore plausible that boys were raised more solicitously than girls, and that girls were subject to various kinds of deprivation in early childhood. We compared the prevalence of linear enamel hypoplasia (LEH) in the dentition of the skeletal remains of early modern Japanese samurai and commoners interred in an urban locat…
People of the Samurai Class Kept their Antemortem Lost Teeth
Three hundred and fifty-seven skeletons were excavated from the old site of the Sougenji temple in Kitakyushu City, Fuknoka Prefecture, Japan, in 1992. These skeletons were remains of the samurai class and had been buried during the seventeenth or eighteenth century (Edo period). To clarify samurai dental habits, we examined their teeth and alveolar condition. Alveoli could be detected at least partly in 141 skeletons. Detailed examination reveal…
Forensic Anthropology and Bioarchaeology Studies (16 works) · Archaeology (11 works) · Medicine (11 works) · Dentistry (10 works) · Geography (10 works) · Forensic and Genetic Research (9 works) · Demography (8 works) · Demography (6 works) · Population (6 works) · Paleopathology and ancient diseases (5 works)