Hiromasa Ozaki

Biographic Data

ID3638233
NAMEHiromasa Ozaki
GIVEN NAMESHiromasa
FAMILY NAMEOzaki
SIGNATUREOZAKI H
AFFILIATIONSThe University of Tokyo
VERIFIEDNo
TOTAL WORKS9
TOTAL CITATIONS19
AUTHOR COUNT9
EDITOR COUNT0
FIRST PUBLICATION YEAR2007
LATEST PUBLICATION YEAR2025
H-INDEX2

  • Human femur and tibia retain primary lamellar bone formed during growth

    Open AccessFumina Minamitani, Hisakazu Takatsuka et al.ARTICLEJournal of Archaeological Science2025References: 3

  • Laser Ablation System With a Diode Laser for Ams 14 C Measurement of Organic Materials

    Open AccessFumina Minamitani, Takayuki Omori et al.ARTICLERadiocarbon2024References: 18

    We constructed a laser ablation (LA) system using a diode laser for the accelerator mass spectrometry radiocarbon (AMS 14 C) measurement of organic materials. The system could extract adequate CO 2 to analyze small masses (0.1 mg C) at a resolution of 250 μm by a 5.5 W diode laser. The LA system was assessed using standard materials (IAEA-C1, IAEA-C2, IAEA-C3, IAEA-C6, and Ox II) and applied to natural tree ring samples. For the LA sampling of or…

  • Radiocarbon Dating of Tree Rings From the Beginning and End of the Yayoi Period, Japan

    Open AccessMinoru Sakamoto, Masataka Hakozaki et al.ARTICLERadiocarbon2024References: 10

    We have conducted radiocarbon ( 14 C) dating of Japanese tree rings from 1053 to 921 BCE and 41 BCE to 130 CE. Dating was also performed using oxygen isotope dendrochronology to investigate subtle structures of the calibration curve corresponding to the beginning and the end of the Yayoi period in Japan. These two results followed IntCal20, which included the 14 C ages of two Japan-sourced trees. The findings suggest that dating of specimens obta…

  • C Dating of an Old Wooden Building

    Open AccessNanae Nakao, Minoru Sakamoto et al.ARTICLERadiocarbon2017Cited by: 1References: 3

    Hikobe House is an important cultural property located in Gunma prefecture. It is one of the oldest manor houses in the Kanto region of Japan. The age of the Hikobe House has up to now been uncertain. There are no architectural records or memorandum tags that indicate when the Hikobe House was built. The living room of the Hikobe House has a style of the latter half of the 17th century, while the guest rooms exhibit a style more typical of the 16…

  • Carbon and nitrogen isotope analysis and radiocarbon dating on the Initial Jomon human skeletons from Iwashita Cave, Sasebo City, Nagasaki, Japan

    Open AccessMinoru Yoneda, Takayuki Omori et al.ARTICLEAnthropological Science2017References: 16

    Bone collagen was extracted from a series of Jomon skeletons from Iwashita Cave in Sasebo City, Nagasaki, Japan, which were excavated in 1964-1966 seasons. The radiocarbon dates on 5 skeletons from Layer V showed calibrated dates between 9000 and 10000 cal B.P. corresponding to the Initial (Earliest) Jomon period

  • Analyzing the Final Jomon human remains from the Nonomae shellmound, Ofunato City, Iwate Prefecture

    Open AccessFumiko Saeki, Noboru Adachi et al.ARTICLEAnthropological Science2016Cited by: 1References: 32

    岩手県大船渡市野々前貝塚から出土した縄文時代晩期の熟年男性1体(1号),胎児ないし新生児1体(2号),壮年後半から熟年前半の女性1体(3号),熟年女性1体(4号),3歳程度の幼児1体(5号)の計5体について,形態人類学的および理化学的分析を実施した。人骨の年代は放射性炭素年代測定により3150~3000年前(cal BP)と推定された。形態学的検討およびDNA分析の双方から,野々前貝塚人骨が縄文時代人に一般的な形質を有することが明らかとなった。ミトコンドリアDNAのハプログループが判明した3体(1号N9b1,4号N9b*,5号M7a2)に母系の血縁関係は認められなかった。特筆すべき古病理学的所見として,出土成人3体全ての外耳道に明瞭な外耳道骨腫が確認された。これは,野々前貝塚の人々が水中(潜水)ないし水面域での漁撈活動に従事していた可能性を示唆するものである。炭素・窒素同位体比の分析では海産物を多く摂取していた食性が提示されており,外耳道骨腫の多発との関連がうかがわれた。また,出土成人3…

  • Conference Participants

    Open AccessElena Alexandrovskaya, Alexander Alexandrovskiy et al.ARTICLERadiocarbon2009

    The Radiocarbon archives are made available by Radiocarbon and the University of Arizona Libraries. Contact [email protected] for further information

  • Radiocarbon in 9th to 5th Century BC Tree-Ring Samples from the Ouban 1 Archaeological Site, Hiroshima, Japan

    Open AccessHiromasa Ozaki, Mineo Imamura et al.ARTICLERadiocarbon2007Cited by: 9References: 12

    In order to investigate the regional atmospheric radiocarbon offset, accelerator mass spectrometry (AMS) 14 C measurements were made on 5-yr increments of a Japanese wood sample dendrochronologically dated to 820–436 BC. The 14 C data from the Japanese tree-ring samples were compared with the IntCal04 calibration curve (Reimer et al. 2004). In most parts, the differences between IntCal04 and 14 C dates in the Japanese tree-ring samples were withi…

  • Radiocarbon Wiggle-Matching of Japanese Historical Materials with a Possible Systematic Age Offset

    Open AccessMineo Imamura, Hiromasa Ozaki et al.ARTICLERadiocarbon2007Cited by: 8References: 7

    Progress in radiocarbon accelerator mass spectrometry (AMS) techniques enables much more access to wiggle-matching techniques for high-precision 14 C dating with relatively low costs than before. Recently, we have applied wiggle-matching for a number of wood samples where dendrochronology is difficult because of various limitations imposed for dendro-dating. In most cases, wiggle-matching gave rather unambiguous calendar ages, but we found that i…