守備範囲

しゅびはんいshubihani

noun

1. area of the field one is supposed to (or able to) defend
2. (one's) field
3. (one's) scope
4. area of expertise
5. range of topics one can converse about
6. breadth of one's interests and knowledge
7. one's type
8. kind of person one is attracted to

Study it in Yanamino