Harajuku Station (JR Line), Omotesando Exit.
Your guide will be waiting outside the exit wearing a fluorescent yellow armband.
If you prefer a different exit (Takeshita Exit / Meiji Jingu Exit), tell me and I will adjust.
Shibuya Station (Hachiko Exit).
The tour will finish in central Shibuya, where you can explore the crossing, shops, and restaurants after the tour.