Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies
if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the
same subfield and year (this is the minimum needed to enter the top 1%, not the average
within it), or reaches the top citation threshold in at least one of its specific research
topics.
Citations per year, relative to Akimasa Masuda Akimasa Masuda (= 1×)
peers
Harold C. Helgeson
Countries citing papers authored by Akimasa Masuda
Since
Specialization
Citations
This map shows the geographic impact of Akimasa Masuda's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Akimasa Masuda with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Akimasa Masuda more than expected).
This network shows the impact of papers produced by Akimasa Masuda. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Akimasa Masuda. The network helps show where Akimasa Masuda may publish in the future.
Co-authorship network of co-authors of Akimasa Masuda
This figure shows the co-authorship network connecting the top 25 collaborators of Akimasa Masuda.
A scholar is included among the top collaborators of Akimasa Masuda based on the total number of
citations received by their joint publications. Widths of edges
represent the number of papers authors have co-authored together.
Node borders
signify the number of papers an author published with Akimasa Masuda. Akimasa Masuda is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
All Works
20 of 20 papers shown
1.
Takano, Shuro, Akimasa Masuda, Yasuhiro Hirahara, et al.. (1997). Observations of 13 C isotopomers of HC 3 N and HC 5 N in TMC-1: evidence for isotopic fractionation. CTIT technical reports series. 329(3). 1156–1169.2 indexed citations
2.
Kagi, Hiroyuki, Kazuya Takahashi, & Akimasa Masuda. (1994). Raman frequencies of graphitic carbon in Antarctic ureilites. Institutional Repository National Institute of Polar Research (National Institute of Polar Research (Japan)). 7(7). 252–261.6 indexed citations
3.
Takahashi, Kazuya & Akimasa Masuda. (1992). Geochemical and chronological studies for Asuka-881757 lunar meteorite.. 17. 117–118.3 indexed citations
4.
Hirata, T. & Akimasa Masuda. (1992). Re-Os Systematics on Metallic Materials of Meteorites: Evidence for Non-Magmatic Evolution of the Iron Meteorites. Meteoritics and Planetary Science. 27(3). 233.6 indexed citations
5.
Kitajima, F. & Akimasa Masuda. (1991). On insoluble organic matter in carbonaceous chondrites.. 16. 48–50.1 indexed citations
6.
Kagi, Hiroyuki, Kazuya Takahashi, Hiroshi Shimizu, F. Kitajima, & Akimasa Masuda. (1991). In-situ micro Raman studies on graphitic carbon in some Antarctic ureilites. Institutional Repository National Institute of Polar Research (National Institute of Polar Research (Japan)). 4. 371–383.7 indexed citations
7.
Masuda, Akimasa, et al.. (1990). Pyrolytic studies of carbonaceous matter in C3 carbonaceous chondrites.. 15. 8–9.1 indexed citations
8.
Kagi, Hiroyuki, Kazuya Takahashi, Hiroshi Shimizu, F. Kitajima, & Akimasa Masuda. (1990). Micro-Raman observation on graphitic materials in ureilites and an iron meteorite. Meteoritics and Planetary Science. 25. 375.4 indexed citations
9.
Takahashi, Kazuya & Akimasa Masuda. (1987). Two lunar meteorites, Yamato-791197 and -82192: REE abundances and geochronological dating. Memoirs of National Institute of Polar Research. Special issue. 46(46). 71–88.9 indexed citations
10.
Masuda, Akimasa, et al.. (1987). Pyrolytic studies of carbonaceous matter in Antarctic carbonaceous chondrites. Memoirs of National Institute of Polar Research. Special issue. 46(46). 196–204.5 indexed citations
11.
Takahashi, Kazuya, Akimasa Masuda, & Hiroshi Shimizu. (1986). REE abundances and Rb-Sr geochronology of Yamato-791197. Memoirs of National Institute of Polar Research. Special issue. 41(41). 96–105.3 indexed citations
12.
Masuda, Akimasa, et al.. (1984). Pyrolytic studies of organic components in Antarctic carbonaceous chondrites Y-74662 and ALH-77307. Memoirs of National Institute of Polar Research. Special issue. 35(35). 250–256.1 indexed citations
13.
Shimizu, Hiroshi, Akimasa Masuda, & Tsuyoshi Tanaka. (1983). Cerium anomaly in REE pattern of Antarctic eucrite. Memoirs of National Institute of Polar Research. Special issue. 30(30). 341–348.18 indexed citations
14.
Shimizu, Hiroshi, Akimasa Masuda, & Tsuyoshi Tanaka. (1979). Two Major Groups of Chondritic REE Abundances Suites: Variable Octad Effect on Heavy REE. Memoirs of National Institute of Polar Research. Special issue. 15(15). 171–176.2 indexed citations
15.
Masuda, Akimasa, et al.. (1979). Rare-Earth Geochemistry of Antarctic Diogenites. Memoirs of National Institute of Polar Research. Special issue. 15(15). 177–188.10 indexed citations
16.
Masuda, Akimasa. (1979). Effects of Linear Bulk Partition Coefficient Functions of REE : Liquid-type and Solid-type Patterns as a Basic Framework. 26. 75–92.5 indexed citations
17.
Masuda, Akimasa, et al.. (1974). Possible REE anomalies of Apollo 17 REE patterns.. 2. 1247–1253.9 indexed citations
18.
Nakamura, Noboru, et al.. (1973). Chemical compositions and rare-earth features of four Apollo 16 samples. Lunar and Planetary Science Conference Proceedings. 4. 1407.13 indexed citations
19.
Masuda, Akimasa. (1962). Experimental method for determination of isotopic composition of lead in volcanic rock. 10(2). 117–124.10 indexed citations
20.
Masuda, Akimasa. (1957). Simple regularity in the variation of relative abundances of rare earth elements. 5(2). 125–134.8 indexed citations
Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive
bibliographic database. While OpenAlex provides broad and valuable coverage of the global
research landscape, it—like all bibliographic datasets—has inherent limitations. These include
incomplete records, variations in author disambiguation, differences in journal indexing, and
delays in data updates. As a result, some metrics and network relationships displayed in
Rankless may not fully capture the entirety of a scholar's output or impact.