- Name: Human Bullet Tank (肉弾戦車, Nikudan Sensha; English TV "Human Boulder")
- Type: C-rank, Offensive, Short to mid-range (0-10m)
- Users: Akimichi clan
- Debut (Anime): Naruto Episode 33
- Debut (Manga): Chapter 55
After the user uses Multi-Size Technique to make themselves into a human-sized ball, they tuck their limbs inside their clothes and use chakra to propel themselves into a powerful, but slow, roll. It is difficult for the user to turn in this form.