Keita Arai. Empirical Study on Resident's Attitudes and Acceptability to Sea Routes at Remote Islands. Ikoma Journal of Economics. 2013. 11. 2. 169-180
Keita Arai. Empirical Study on Management Improvement of Sea Routes at Remote Islands. Ikoma Journal of Economics. 2013. 10. 3. 199-227
Keita Arai. The Empirical Analysis on the Relationship between Newly Started Business and Regional Social Capital. Ikoma Journal of Economics. 2012. 9. 3. 239-251
Keita Arai. Estimation of the Regional Social Capital by Questionnaire Survey Data. Ikoma Journal of Economics. 2011. 9. 2. 117-132
Keita Arai. Essay on the Improvement of Sea Routes at Remote Islands. Transportation and Economy. 2010. 7. 1. 39-45
"Public Transport Services in Rural Area for the Elderly -In Case of Western Japan-"
(TRANSED (International Conference on Mobility and Transport for Elderly and Disabled Persons ) 2015)