- III Bed, Oya Formation
- III Formation (Upper), Himenoura Group
- III Formation (Lower), Himenoura Group
- 3rd-a Terrace Deposit
- 3rd Pyroclastic Cone Deposit
- 3rd stage, Kurohime volcano
- 3rd stage, Kusatsu-Shirane volcano
- 3rd stage products, Iiji volcano
- 3rd stage products, Naeba volcano
- 3rd Terrace Deposit, Kadota
- 3rd Terrace Deposits, Mount Gozaishoyama
- III Zone, Kitakami mountains plutonic rocks