カギ括弧 でしょう
kagikakkodeshō
1. Probably within brackets.; Likely bracketed.
Noun
#251945
1. Probably within brackets.; Likely bracketed.
1. attractive; good-looking
1. being able to do as one pleases; doing at will
2. pothook
1. key
2. lock
3. key (to a problem, success, etc.); clue
1. firm; unshakeable
1. brackets; parentheses
1. it seems; I think
2. right?; don't you agree?
1. Let's limit.; Let's restrict.