Authorship：Lead author   Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：ACM  

DOI： 10.1145/3504006.3504012

researchmap

Language：Japanese   Publishing type：Research paper (scientific journal)  

researchmap

Authorship：Lead author   Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：ACM  

DOI： 10.1145/3429395.3429400

researchmap

Authorship：Lead author   Language：Japanese   Publishing type：Research paper (bulletin of university, research institution)  

researchmap

Language：English   Publishing type：Research paper (international conference proceedings)  

researchmap

Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1145/3227696.3227704

researchmap

Language：Japanese   Publishing type：Research paper (bulletin of university, research institution)  

researchmap

Language：Japanese   Publisher：THE JAPAN SOCIETY FOR MANAGEMENT INFORMATION (JASMIN)  

With the increasing penetration of smartphone usage, many people use smartphone online shopping applications. Many consumers use smartphone applications from specific online stores or malls for their online purchasing. These behaviors are different from the behaviors of searching for goods using search engines. To reveal the behavior for such applications, this study administered questionnaires to examine young people's usage of online shopping applications on smartphones. Our research demonstrates that most young people installed online shopping applications. Our research also reveals young people's priority for such applications.

DOI： 10.11497/jasmin.2018s.0_96

CiNii Research

researchmap

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1007/s12626-017-0008-z

researchmap

Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1145/3092090.3092101

researchmap

Language：English   Publishing type：Research paper (international conference proceedings)  

researchmap

Language：English   Publishing type：Research paper (scientific journal)   Publisher：Inderscience Publishers  

DOI： 10.1504/ijwet.2016.079038

Scopus

researchmap

Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1145/2955129.2955134

researchmap

Language：Japanese   Publisher：THE JAPAN SOCIETY FOR MANAGEMENT INFORMATION (JASMIN)  

Vietnam economy has been developing in recent years. With the increase of the number of Internet users, many Vietnamese people are using online shopping. Many Japanese companies are interested in Vietnamese online shopping market. The differences of Vietnamese and Japanese consumer behavior for online shopping are not clear. This study examines consumer behavior and priorities in online shopping through the distribution of a questionnaire to Vietnamese and Japanese Internet users. It finds the differences and similarities between the two countries.

DOI： 10.11497/jasmin.2015f.0_459

CiNii Research

researchmap

Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：Springer Verlag  

This study examines consumer behavior and priorities in online shopping through the distribution of a questionnaire-subjected to choice-based conjoint analysis-to 1341 Japanese Internet users. It finds that respondents placed a higher priority on the popularity of online shops than on other attributes. Surprisingly, respondents considered postage as a more important criterion than the selling price of goods. Our results show that respondents who made purchases at online shops were tolerant of the postage costs and selling prices of goods but expressed a stronger dislike for the former than did inexperienced respondents. In addition, respondents who had faced problems in online shopping estimated the popularity of online shops lower and tolerated higher selling prices more than the other respondents. These results contribute to the understanding of customers and suggest effective marketing strategies for online shopping. © Springer International Publishing Switzerland 2014.

DOI： 10.1007/978-3-319-08618-7_37

Scopus

researchmap

Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1007/978-94-007-7287-8_36

researchmap

Language：English   Publishing type：Part of collection (book)   Publisher：Springer-Verlag Wien  

Business-to-consumer (B2C) e-commerce has become one of the most important models for stores and enterprises. Many of them, however, face a difficult business environment because they lack an adequate understanding of the market. To develop the B2C market, this study seeks to identify young people's behavior and perceptions regarding online shops. This study finds that most youth use online shops for purchasing books, CDs, and clothes. They think that online shops offer the advantage of the ready availability of goods, but most want to confirm the goods' quality, which is not possible in online shopping. Youth may regard online shops as a complementary channel to physical shops. Through conjoint analysis, differences in the value of product availability could be attributed to gender. We also demonstrate that consumer behavior changes with online shops' manner of pricing display. These contributions will suggest effective marketing strategies for online shops.

DOI： 10.1007/978-3-7091-1425-4_11

Scopus

researchmap

Language：Japanese   Publisher：愛媛大学経済学会  

CiNii Books

researchmap

Language：Japanese   Publisher：愛媛大学経済学会  

CiNii Books

researchmap

Language：Japanese   Publisher：いよぎん地域経済研究センター  

CiNii Books

researchmap

Language：Japanese   Publisher：愛媛大学地域創成研究センター  

CiNii Books

researchmap

Language：Japanese   Publisher：愛媛大学経済学会  

CiNii Books

researchmap

Language：Japanese   Publisher：愛媛大学地域創成研究センター  

CiNii Books

researchmap

Language：Japanese   Publisher：愛媛大学経済学会  

CiNii Books

researchmap

Language：Japanese  

CiNii Books

researchmap

Other Link： http://iyokan.lib.ehime-u.ac.jp/dspace/handle/iyokan/2212

Language：English  

researchmap

Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：IEEE Computer Society  

Business-to-consumer (B2C) E-commerce has become one of the most important models for stores and enterprises. Many of them, however, face a difficult business environment because they lack an adequate understanding of the market. To develop the B2C market, this study seeks to identify the behavior of young people's behavior and perception of online shops. This paper finds that most youth use online shops for purchasing books, CDs, and clothes. They think online shops offer the advantage of ready availability of goods. However, most youth want to confirm the goods' quality, which is not possible in online shopping. Youth may regard online shops as a complementary channel to physical shops. Through conjoint analysis, differences in the value of product availability could be attributed to sex. We also demonstrate that consumer behavior changes with the online shops' manner of pricing display. These contributions will suggest effective marketing strategies for online shops. © 2011 IEEE.

DOI： 10.1109/SAINT.2011.105

Scopus

researchmap

Other Link： http://dblp.uni-trier.de/db/conf/saint/saint2011.html#conf/saint/SogaO11

Language：English   Publisher：愛媛大学経済学会  

CiNii Books

researchmap

Language：Japanese   Publisher：愛媛大学経済学会  

CiNii Books

researchmap

Language：English  

researchmap

Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：IEEE Computer Society  

B to C market in Japan has been expanding as developing ICT infrastructure. In order to expand online shop market, we research consumer behavior of online shops. From our research at five universities, although many students utilize online shop web site, they have the inertia for real store in purchasing. They find out different conveniences and inconveniences to online shops for each goods. Students in different university or region have different reason for utilizing online shops. These findings will also give suggestions for constructing sales strategies of online shops. © 2010 IEEE.

DOI： 10.1109/SAINT.2010.36

Scopus

researchmap

Other Link： http://dblp.uni-trier.de/db/conf/saint/saint2010.html#conf/saint/Okamoto10

Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：IEEE  

There are many cases which entrust the operation and maintenance of public facilities to private sectors or organizations in recent years. The main purpose of the consignment is cost reduction. The sewage facilities are the representatives of such consignment. Although such consignment lowers expense in the short term by reduction of labor cost, there would be a risk of increasing expense of the public service from a long-term viewpoint. That is, this comprehensive private consignment has an agency problem. This paper points out the effectiveness of information sharing systems for improving asymmetry of information, and the necessity for standardization of information and widening the area. This paper proposed the one direction of the systems, that is, utilizing Web2.0 technologies.

DOI： 10.1109/SAINT.2009.48

Web of Science

researchmap

Other Link： http://dblp.uni-trier.de/db/conf/saint/saint2009.html#conf/saint/Okamoto09

Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：IEEE Computer Society  

DOI： 10.1109/SAINT.2008.78

researchmap

Other Link： http://dblp.uni-trier.de/db/conf/saint/saint2008.html#conf/saint/Okamoto08

Language：Japanese  

J-GLOBAL

researchmap

Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：一般社団法人社会情報学会  

It is well known that information commodities have network externalities (NE). Because of the externalities, the markets of information commodities tend to become the monopoly. But if NE consist of two factors, each effect stemming from the agent's neighborhoods and the market, there is a possibility that some products coexist m the competitive market. This paper suggests multi-agent models of NE that include the effect from neighborhoods and simulates some cases with them. The following results are obtained from the simulation. When NE from neighborhoods is strong, users of the commodity form uneven distributed groups and some products live together m the market. And about start-up diffusion strategies, the concentrate diffusion strategy is more effective than the diversified one in the case that gathering users have great influence.

researchmap

Publisher：THE JAPAN SOCIETY FOR MANAGEMENT INFORMATION (JASMIN)  

Wireless LAN attracts attention as one of the solution of "the last one-mile problem". If we use wireless LAN as information network infrastructure, broadband environment may be comparably easily offered to us. We can consider there are three subject of the provider of internet access service, that is, "Public" such as a national government or a local government, "Commercial" such as a corporation, "Community" such as NPO. Especially in this study, it focuses on information network infrastructure in non-urban area, and it is tried to lead to the suggestion that how to construct the information network infrastructure in comparison with these three providers based on the cases of Okinawa or Kyoto.

DOI： 10.11497/jasmin.2003f.0.21.0

researchmap

Language：Japanese   Publishing type：Doctoral thesis  

researchmap

Language：Japanese   Publishing type：Research paper (scientific journal)  

Among "information network goods, " such as information commodities, there are many that require learning to facilitate their utilization. These goods possess unique characteristics in their diffusion process. This is because the essential qualities of information network goods, i.e., network externalities, and learning have an influence on the convenience of consumers. In this paper, a diffusion model for information network goods that require learning has been constructed and studied with a simulation. The study showed that special learning relaxes the tendency of the market becoming monopolized after being "lock-in." Furthermore, although firms have the option of selecting a compatibility strategy following their defeat in the market, it was learned that this strategy should be chosen at an early stage following a "lock-in" market condition.

researchmap

Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：白桃書房  

CiNii Books

researchmap

Total pages：196   Responsible for pages：62-74   Language：Japanese   Book type：Scholarly book

researchmap

Total pages：188   Responsible for pages：29-44   Language：Japanese   Book type：Scholarly book

researchmap

Total pages：224   Responsible for pages：49-74   Language：Japanese   Book type：Scholarly book

researchmap

Language：Japanese   Publishing type：Rapid communication, short report, research note, etc. (bulletin of university, research institution)  

CiNii Books

researchmap

Other Link： http://iyokan.lib.ehime-u.ac.jp/dspace/handle/iyokan/4140

Language：Japanese  

CiNii Books

researchmap

Language：Japanese   Publisher：電子情報通信学会  

researchmap

Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)  

researchmap

Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (other)  

researchmap

Language：Japanese   Publisher：愛媛大学経済学会  

CiNii Books

researchmap

Language：English   Publisher：愛媛大学経済学会  

CiNii Books

researchmap

Language：Japanese   Publisher：愛媛大学経済学会  

CiNii Books

researchmap

Language：Japanese  

J-GLOBAL

researchmap

Authorship：Lead author   Language：Japanese  

It is well known that information commodities have network externalities (NE). Because of the externalities, the markets of information commodities tend to become the monopoly. But if NE consist of two factors, each effect stemming from the agent's neighborhoods and the market, there is a possibility that some products coexist m the competitive market. This paper suggests multi-agent models of NE that include the effect from neighborhoods and simulates some cases with them. The following results are obtained from the simulation. When NE from neighborhoods is strong, users of the commodity form uneven distributed groups and some products live together m the market. And about start-up diffusion strategies, the concentrate diffusion strategy is more effective than the diversified one in the case that gathering users have great influence.

CiNii Books

researchmap

Other Link： http://dl.ndl.go.jp/info:ndljp/pid/10484229

Language：Japanese   Publisher：愛媛大学経済学会  

CiNii Books

researchmap

Language：Japanese   Publishing type：Rapid communication, short report, research note, etc. (bulletin of university, research institution)  

researchmap

Language：Japanese   Publisher：愛媛大学経済学会  

CiNii Books

researchmap

Language：Japanese   Publisher：The Institute of Electronics, Information and Communication Engineers  

Developing of information technologies, many information commodities have been supplied to the market. The diffusion process of them possess unique characteristics in their diffusion process. So, when firms try to diffuse their own products, the need the unique diffusion strategies. The purpose of this paper is to show the diffusion characteristics of these commodities and to suggest the diffusion strategies. We categorize goods from the viewpoint of network externalities and learning. Then, for each category, the study examines the diffusion characteristics and suggests possible diffusion strategies.

CiNii Books

researchmap

Language：Japanese   Publisher：Japan Society for Information and Management  

Electronic money is being developed as a safe, simple, and convenient means of settling accounts on information network, and it is expected to become a common medium in the near future. In spite of its importance, however, there are no clear strategies in the policy for the widespread use of electronic money. The purpose of this paper is to suggest possible diffusion strategies for electronic money. The first is to categorize electronic money from the viewpoint of its exchange properties. Then, to classify electronic money competition into intra-category and between-category types, clarify their diffusion properties, and examine the development direction of electronic money. Finally, the study suggests investment strategies for electronic money diffusion.

CiNii Books

researchmap

Authorship：Lead author   Language：Japanese  

Among "information network goods, " such as information commodities, there are many that require learning to facilitate their utilization. These goods possess unique characteristics in their diffusion process. This is because the essential qualities of information network goods, i.e., network externalities, and learning have an influence on the convenience of consumers. In this paper, a diffusion model for information network goods that require learning has been constructed and studied with a simulation. The study showed that special learning relaxes the tendency of the market becoming monopolized after being "lock-in." Furthermore, although firms have the option of selecting a compatibility strategy following their defeat in the market, it was learned that this strategy should be chosen at an early stage following a "lock-in" market condition.

CiNii Books

researchmap

Other Link： http://dl.ndl.go.jp/info:ndljp/pid/10484111

Language：Japanese   Publisher：The Institute of Electronics, Information and Communication Engineers  

Because of a rapid growth of the network industry, concepts of consumption externalities and network externalities have become the center of discussions in the field of management science. In this paper, on the basis of our model included in a firm's stance and its domain of product differentiation, we try to examine which the firm chooses the strategy of compatibility provoking network externalities, or the strategy of product differentiation provoking only its own consumption externalities. There could exist the situation that a firm promised to win in the long term would like to adopt the strategy of compatibility if the product life cycle is relatively short.

CiNii Books

researchmap

Language：Japanese   Publisher：The Institute of Electronics, Information and Communication Engineers  

What influence the electronic money as payment tools do on the social and economic systems should be investigated from the viewpoint of the payment functions. Any payment tool cannot work well without establishing the social position of commonly acoepted medium of exchange (CAMOE). If a payment tool becomes CAM0E, it gets network externalities which, in turn, push it to the dominant position in the market. Then we try to find strategies of permeating electronic money into the cash-dominant-market by considering the payment functions, especially on transferability, multi-purpose, and finality

CiNii Books

researchmap

Language：Japanese   Publisher：The Institute of Electronics, Information and Communication Engineers  

Among network services, there are the services that a few member groups interact each other like credit card service. Those services have mutual-dependent network externalities, which are different from network externalities known previously. In this paper, we have taken the case and studied the influence of the externalities for the competition of the service. We also have proposed a simple competition model between those services and tried to lead the characteristic of the competition.

CiNii Books

researchmap

Language：Japanese   Publisher：The Institute of Electronics, Information and Communication Engineers  

It has been previously known that network externalities exist in network service. We think that there are several types of network externalities. In this study, we have classified the network externalities into three types on the basis of their method of influence. For "self-loop network externalities," one of the three types, we have proposed a competition model between the wire telephone and the portable mobile telephone as an applied model of actual services. We have also studied the penetration strategy of charge with the model.

CiNii Books

researchmap

Language：Japanese   Publisher：The Institute of Electronics, Information and Communication Engineers  

Spread of interactive information communication service has a specific characteristic called network externalities. Because of these network externalities, competition between two networks creates peculiar characteristics that do not exist in other goods. In this paper, we have proposed a network penetration model with due consideration for network externalities, developed it as a competition model, and analyzed it. As a result, we have shown that stable equilibria and a critical mass exist, and have clarified their characteristics.

CiNii Books

researchmap

Language：Japanese   Publisher：The Institute of Electronics, Information and Communication Engineers  

On the decision to hold a credit-card,we consider its availability at shops.Contrary,for shops,whether or not to implement card readers depends upon how much the cards prevail.To study the network externalities of this type,we can′t use the form er feedback model that the number of subscribers influences itself, acquired from the electric communication network.″Mutual-dependent Network Externalities″,we define it for the condition that plural groups of subscribers influence one another.The model we made on this paper is useful to get the nature of the penetration under such circumstances.And we investigate the condition of the stability of equilibrium penetration ratio,the restriction on price policies,and so on.

CiNii Books

researchmap

Event date： 2020.10 - 2020.11

Language：English   Presentation type：Oral presentation (general)  

researchmap

Event date： 2020.10 - 2020.11

Language：English   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：English   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：English   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：English   Presentation type：Oral presentation (general)  

researchmap

Language：English   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：English   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：Okinawa Convention Center  

researchmap

Language：English   Presentation type：Oral presentation (general)  

researchmap

Language：English   Presentation type：Oral presentation (general)  

researchmap

Language：English   Presentation type：Oral presentation (general)  

researchmap

Language：English   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：English   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：Matsuyama, Ehime  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

researchmap

researchmap