First names for Koyakumaru
- Hiroshi Koyakumaru 2
- Hirokazu Koyakumaru 2
- Toshiyuki Koyakumaru
- Shougo Koyakumaru
- Sae Koyakumaru
- Naoto Koyakumaru
- Megumi Koyakumaru
- Koji Koyakumaru
- Kimio Koyakumaru
- Kazuki Koyakumaru
- Kazuhisa Koyakumaru
- Chika Koyakumaru
- Akane Koyakumaru