Definition of 先頭集団 (せんとうしゅうだん)
せんとうしゅうだん
                        先頭集団
せんとうしゅうだん
sentoushuudan
noun
•
        
leading group (of runners in a marathon, etc.), leading pack
Related Kanji
| 先 | before, ahead, previous, future, precedence | 
| 頭 | head, counter for large animals | 
| 集 | gather, meet, congregate, swarm, flock | 
| 団 | group, association |