To examine the characteristics of the effects and issues of human resource development (HRD) of employees in agricultural corporations in Japan, this study compares the main farm products, with a focus on greenhouse vegetables. We analyzed data from a questionnaire survey conducted in 2016. The results are as follows. (1) “Everyday meeting” and “support for obtaining qualification” are the most common effective measures. (2) “Hiring” and “securing” competent employees are the most common issues. (3) Greenhouse vegetable corporations have more issues in terms of shortage of personnel for training employees. (4) Moreover, their implementation of HRD is at a lower level. This could be due to differences in the expectations for non-management employees of Greenhouse vegetable corporations. (5) “Preparation manuals” and “securing employees of similar age” seem to be effective, however “job rotation” and “independent division system” are not. Hence, more insight into motivation improvement for non-management employees and career development for women are especially important.