Definition of 行動半径 (こうどうはんけい)
こうどうはんけい
                        行動半径
こうどうはんけい
koudouhankei
noun
•
        
radius of action, sphere of activity
Related Kanji
| 行 | going, journey, carry out, conduct, act, line, row, bank | 
| 動 | move, motion, change, confusion, shift, shake | 
| 半 | half, middle, odd number, semi-, part- | 
| 径 | diameter, path, method |