Tsuyoki Mono yo is the second ending theme of Shin Mazinger Shogeki! Z Hen. It is performed by SKE48 as its first single. It reached #5 on the Oricon charts on its first week of release.
- Lyrics: Yasushi Akimoto
- Composition: Koji Ueda
- Released: August 5, 2009
- This song was the first and last song SKE48 performed for Lantis and was performed by Team S members: Aki Deguchi, Kanako Hiramatsu, Rikako Hirata, Mizuki Kuwabara, Jurina Matsui, Rena Matsui, Yui Matsushita, Sayuki Mori, Yuka Nakanishi, Haruka Ono, Masana Oya, Rina Shinkai, Shiori Takada, Kumi Yagami, Moe Yamashita, Tsukina Takai.