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.
This map shows the geographic impact of Eiji Okamoto'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 Eiji Okamoto with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Eiji Okamoto more than expected).
This network shows the impact of papers produced by Eiji Okamoto. 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 Eiji Okamoto. The network helps show where Eiji Okamoto may publish in the future.
Co-authorship network of co-authors of Eiji Okamoto
This figure shows the co-authorship network connecting the top 25 collaborators of Eiji Okamoto.
A scholar is included among the top collaborators of Eiji Okamoto 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 Eiji Okamoto. Eiji Okamoto is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Okamoto, Eiji, et al.. (2018). A Study on Adaptive Coded Transmission Scheme using Polar Code. IEICE Technical Report; IEICE Tech. Rep.. 117(396). 79–83.1 indexed citations
3.
Nishide, Takashi, et al.. (2018). Expressive Ciphertext-Policy Attribute-Based Encryption with Fast Decryption.. 8. 37–56.3 indexed citations
4.
Okamoto, Eiji, et al.. (2015). Consideration on energy-efficient adaptive linghting control scheme by using accurate indoor localization. 114(394). 151–156.1 indexed citations
5.
Okamoto, Eiji. (2015). A study on performance improvement of chaos MIMO scheme using advanced stochastic characteristics. IEICE Technical Report; IEICE Tech. Rep.. 115(288). 31–36.1 indexed citations
6.
Okamoto, Eiji, et al.. (2013). An improved NLOS detection scheme in indoor Hybrid-TOA/AOA-based localization. IEICE technical report. Speech. 113(132). 77–82.
7.
Okamoto, Eiji, et al.. (2009). A Framework for Building and Managing Secured ERP Landscape.. Security and Management. 490–495.2 indexed citations
8.
Okamoto, Eiji, et al.. (2008). Study on MAP decoding for component code on chaotic coded modulation. IEICE Technical Report; IEICE Tech. Rep.. 108(336). 75–80.1 indexed citations
9.
Okamoto, Eiji, et al.. (2008). An iterative signal detection scheme for MIMO SC-FDE using ISI canceller and MLD. 107(500). 89–94.1 indexed citations
10.
Peng, Kun, Colin Boyd, Ed Dawson, & Eiji Okamoto. (2006). A novel range test. Lecture notes in computer science. 247–258.2 indexed citations
11.
Okamoto, Takeshi, et al.. (2006). Broadcast Encryption with Sender Authentication and its Application. 47(11). 2992–3004.1 indexed citations
12.
Okamoto, Eiji, et al.. (2004). Application of Wavelet Packet Modulation to Mobile Communication. IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences. 87(10). 2684–2691.1 indexed citations
13.
Mambo, Masahiro, et al.. (1998). Anonymous Public Key Certificates and their Applications. IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences. 56–64.4 indexed citations
14.
Okamoto, Eiji, et al.. (1998). Constructing Identity-Based Key Distribution Systems over Elliptic Curves (Special Section on Information Theory and Its Applications). IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences. 81(10). 2138–2143.1 indexed citations
15.
Doi, Hiroshi, Eiji Okamoto, & Masahiro Mambo. (1998). Multisignature Schemes Using Structured Group ID. 98(464). 43–48.2 indexed citations
Itoh, Toshiya, Toshinobu Kaneko, Mitsuru Matsui, et al.. (1996). FOREWORD (Special Section on Cryptography and Information Security). IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences. 79(1). 1.
18.
Okamoto, Eiji, et al.. (1996). Algebraic Properties of Permutation Polynomials (Special Section on Discrete Mathematics and Its Applications). IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences. 79(4). 494–501.
19.
Okamoto, Eiji, et al.. (1995). Permutation Cipher Scheme Using Polynomials over a Field. IEICE Transactions on Information and Systems. 78(2). 138–142.
20.
Okamoto, Eiji, et al.. (1995). Permutation Polynomials and Their Applications to Cryptography. 1995. 466–467.1 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.