Even if the "V-te-a-ru" construction indicates some implicit agents, the agent cannot be overtly expressed as a subject, which takes the nominative case-marker "ga", i.e., the agent is excluded from subject positions as shown in examples (8a-c) 4 / 5 .
this kind of analysis might rest on the assumption that these sentences contain some hidden agents that are revealed in combination with the intentional active verbs.