This map shows the geographic impact of Hiroaki Ishii'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 Hiroaki Ishii with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Hiroaki Ishii more than expected).
This network shows the impact of papers produced by Hiroaki Ishii. 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 Hiroaki Ishii. The network helps show where Hiroaki Ishii may publish in the future.
Co-authorship network of co-authors of Hiroaki Ishii
This figure shows the co-authorship network connecting the top 25 collaborators of Hiroaki Ishii.
A scholar is included among the top collaborators of Hiroaki Ishii 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 Hiroaki Ishii. Hiroaki Ishii is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Park, Jaewoo & Hiroaki Ishii. (2012). What Makes Desire For Touch Strong?: Investigation of Individual Determinants of Desire For Touch. ACR Asia-Pacific Advances.1 indexed citations
3.
Li, Xuesong, Hiroaki Ishii, & Minghao Chen. (2012). Batch scheduling problem with due-date and fuzzy precedence relation. Kybernetika. 48(2). 346–356.5 indexed citations
Ishii, Hiroaki, et al.. (2010). NONLINEAR IDENTIFICATION AND MEDICAL DIAGNOSIS SYSTEM USING FUNCTIONAL-TYPE SIRMS CONNECTED FUZZY INFERENCE METHOD. International journal of innovative computing, information & control. 6(11). 5275–5286.6 indexed citations
6.
Ishii, Hiroaki, et al.. (2010). Framework of risk elimination from reports on unsafe acts, mechanical and physical hazards. 2(1). 1–7.1 indexed citations
7.
Katagiri, Hideki, et al.. (2009). A VARIANCE MINIMIZATION MODEL FOR FUZZY RANDOM MINIMUM SPANNING TREE PROBLEMS. Scientiae mathematicae Japonicae. 70(3). 317–328.1 indexed citations
8.
Ishii, Hiroaki & Yue Ge. (2009). FUZZY TRANSPORTATION PROBLEM WITH RANDOM TRANSPORTATION COSTS. Scientiae mathematicae Japonicae. 70(2). 151–157.1 indexed citations
9.
Hasuike, Takashi & Hiroaki Ishii. (2008). A 0-1 KNAPSACK PROBLEM CONSIDERING RANDOMNESS OF FUTURE RETURNS AND FLEXIBLE GOALS OF AVAILABLE BUDGET AND TOTAL RETURN. Scientiae mathematicae Japonicae. 68(1). 117–127.3 indexed citations
10.
Ishii, Hiroaki, et al.. (2007). Mathematical Approach for Consensus Formation. Asia Pacific Management Review. 12(3). 145–149.2 indexed citations
Shibata, Junko, et al.. (2005). Knowledge Discovery from Questionnaire Survey by Nonlinear Optimization(Mathematics of Optimization : Methods and Practical Solutions). Kyoto University Research Information Repository (Kyoto University). 1461. 148–153.1 indexed citations
13.
Katagiri, Hideki, Μ. Sakawa, & Hiroaki Ishii. (2005). A STUDY ON FUZZY RANDOM PORTFOLIO SELECTION PROBLEMS BASED ON POSSIBILITY AND NECESSITY MEASURES. Scientiae mathematicae Japonicae. 61(2). 361–369.13 indexed citations
14.
Ishii, Hiroaki, et al.. (2004). An Improved Algorithm to Compute Marginal Reliability Importance in a Network System. IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences. 87(2). 454–460.1 indexed citations
15.
Ishii, Hiroaki, et al.. (2002). Single machine batching problem to minimize the sum of completion times with number of batches and batch size limitations. Scientiae mathematicae Japonicae. 55(2). 369–381.1 indexed citations
Katagiri, Hideki & Hiroaki Ishii. (2000). LINEAR PROGRAMMING PROBLEM WITH FUZZY RANDOM CONSTRAINT. Mathematica japonica. 52(1). 123–129.17 indexed citations
18.
Noguchi, Hiroshi & Hiroaki Ishii. (2000). THE APPLICATION OF RANK ORDINAL DATA USING DEA MODEL TO CONJOINT ANALYSIS. Mathematica japonica. 51(1). 21–34.3 indexed citations
19.
Ishii, Hiroaki, et al.. (2000). Approximation algorithms for scheduling problems. IEICE Transactions on Information and Systems. 83(3). 496–502.2 indexed citations
20.
Ishii, Hiroaki, et al.. (1998). A COMPETITIVE FACILITY LOCATION PROBLEM WITH ESTABLISHING COST. Mathematica japonica. 48(1). 19–26.1 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.