Final answer:
The sentence implies that 'otaku' individuals typically socialize within their specialized communities of interest, such as those centered around Japanese anime and manga.
Step-by-step explanation:
Otaku tend to be quite insular and tend to socialize primarily within their specialized communities of interest. The word 'otaku' is often associated with people who are avid fans of Japanese anime and manga, and who may prefer engaging with others who share the same passion. Hence, the sentence means that otaku individuals tend to socialize mainly with other enthusiasts within the anime and manga communities. This behavior is a reflection of their deep interest and the sense of belonging they find among those with similar preferences. While 'otaku' can sometimes have a negative connotation, suggesting a lack of broader social interaction, it is also seen as a way to connect with others over shared interests in pop culture communities.