• P1, 北海道
• P1, 群馬県
• P1 Pumice Flow Deposit, Asama volcano
• P2, 北海道
• P2, 群馬県
• P2 Pumice Flow Deposit, Asama volcano
• P3, 北海道
• P4, 北海道
• P5, 北海道
• P5, 群馬県
• P6, 北海道
• P6, 群馬県
• P7, 北海道
• P7, 群馬県
• P8, 北海道
• P8, 群馬県
• P9, 群馬県
• P10, 群馬県

• Panke Formation
• Pankehoronai Unit
• Pankenushi Gabbro Complex
• Pankenushi layered olivine gabbro complex
• Pankezawa Formation
• Parasitic cone, Iwakisan volcano
• Parasitic cone, Kayodake volcano
• Parasitic crater, Higashiyama volcano
• Parasitic crater lava, Toshima volcano

• Pechikunnai Formation
• Penke Formation
• Peshi-misaki Lava Dome

• PHD 1
• PHD 2
• PHD 3
• PHD 4
• PHD 5
• PHD 6
• PHD 7
• PHD 8

• Pink group tuff
• Pink Tephra
• Pink zone
• Pinneshiri-dake Lava
• Pirashuke Unit

• PK

• Pm-I
• Pm-I'
• Pm-I'-2
• Pm-1A
• Pm-1B
• Pm-II
• Pm-II'
• Pm-II-4
• Pm-2A
• Pm-2B
• Pm-III
• Pm-III'
• Pm-3A
• Pm-3B
• Pm-3C
• Pm-3D
• Pm-3E
• Pm-3F
• Pm-3G
• Pm4, Yatsugatake volcano
• Pm-IV, Ontake volcano
• Pm-V, Ontake volcano

• Pointjo Lava
• Pon-Asahidake volcanic edifice
• Pon'moshirito Lava Dome
• Ponponyama Sandstone
• Ponsubetsu Formation
• Poronai Formation
• Poronai Group
• Poroshiri Ophiolite
• Post-caldera cone, Higashiyama volcano
• Post-caldera eruption stage, Akita-Komagatake volcano
• Post-caldera lava, Kayodake volcano
• Post-caldera stage, Akagi Volcano
• Post-caldera stage, Oshima volcano
• Post-caldera volcanic rocks, Aso volcano
• Post-Kutcharo caldera volcanoes
• Post-Torikabuto Stage

• Pre-Ama Formation
• Pre-Aso volcanic rocks
• Pre-caldera cone, Higashiyama volcano
• Pre-caldera stage, Oshima volcano
• Pre-caldera stratovolcano, Kayodake volcano
• Pre-Sotoizumi Group
• Pre-Yakeyama Lava

• Ps

• Pt1
• Pt2

• Pumice-eruption stage, Akagi Volcano
• Pumice Tephra
• Purple propylite Member
• Purple Tuff Breccia Member