Yamatake Kōkogaku Kenkyūjo
Goten Ninomiya iseki- Gunma-ken Maebashi-shi Kotōka iseki hakkutsu chōsa hōkokusho
- Gunma-ken Maebashi-shi Sekigoe iseki hakkutsu chōsa hōkokusho
- Gunma-ken Tomioka-shi Daikokuzuka 2-gōfun
- Gunma-ken Tomioka-shi Kanra-machi Hinatayama iseki hakkutsu chōsa hōkoku
- Gunma-ken Tomioka-shi Kuwahara isekigun hakkutsu chōsa hōkokusho
- Gunma-ken Tomioka-shi Myōgi-machi Takada jōshi hakkutsu chōsa hōkokusho
- Gunma-ken Tomioka-shi Nakajima iseki hakkutsu chōsa hōkokusho
- Gunma-ken Tomioka-shi Uda jōshi hakkutsu chōsa hōkokusho
- Gunma-ken Tomioka-shi Wada iseki
- Maehata iseki, Uchiide I iseki, Nyūjō Nishi iseki, Gobuichi iseki, Senzoku iseki
- Ogara-machi iseki