First names for Kenkyukai
- Hdf Kenkyukai 2
- Bushido Kenkyukai 2
- Aikido Kenkyukai 2
- Wadoryu Kenkyukai
- Sikabiyouiryou Kenkyukai
- Shogyoshisetsu Kenkyukai
- Rekishigaku Kenkyukai
- Okinawa Kenkyukai
- Nipponto Kenkyukai
- Myshotoshinkai Kenkyukai
- Matidukuri Kenkyukai
- Koden Kenkyukai
- Khodim Kenkyukai
- Iryokaigojimu Kenkyukai
- Cdram Kenkyukai
- Aiki Kenkyukai