First names for Koubuchi
- Takeshi Koubuchi 2
- Miyu Koubuchi 2
- Hiroyuki Koubuchi 2
- Hikaru Koubuchi 2
- Hidetoshi Koubuchi 2
- Yutaka Koubuchi
- Yumiko Koubuchi
- Shinya Koubuchi
- Nozomi Koubuchi
- Motonori Koubuchi
- Masaya Koubuchi
- Masasi Koubuchi
- Mamiko Koubuchi
- Makoto Koubuchi
- Maasa Koubuchi
- Kiyoshi Koubuchi
- Keiji Koubuchi