An optical space communication apparatus comprising a plurality of light receiving sections that each receive laser light, and at least one processor, the at least one processor carrying out:
- a measurement process of measuring light receiving states of the laser light at the respective plurality of light receiving sections;
- a determination process of determining whether or not communication carried out with the laser light is hindered;
- and
- an inference process of inferring, based on the light receiving states, a hindrance factor to the communication carried out with the laser light.