• W1 Unit
• W2 Unit
• W2a Unit
• W2b Unit
• W3 Unit
• W4 Unit
• W4a Unit
• W4b Unit
• W5 Unit
• W6a Unit
• W6b Unit
• W6c Unit
• W6d Unit
• W6e Unit
• W6 Unit
• W7a Unit
• W7b Unit
• W7 Unit
• W8a Unit
• W8b Unit
• W8 Unit
• W9 Unit
• W10 Unit
• W11 Unit
• W12 Unit
• W13 Unit
• W14 Unit
• W15 Unit

• Wabuchi Conglomerate Member

• Wachiba Member
• Wachi Complex
• Wachi Formation
• Wachino Formation

• Wadabokujyo Volcanics
• Wadagawabashi Conglomerate Member
• Wadagawa Formation
• Wadagawa Terrace Bed
• Wadaira Tuff Member
• Wada Member
• Wadano Conglomerate
• Wada Quartz Diorite
• Wadashima Group
• Wadashima Member
• Wada Tephra
• Wadatoge Volcanics
• Wada Welded Tuff

• Wagakunisan Metamorphic Rocks

• Wakago volcano
• Wakahata Formation
• Wakanabe Formation
• Wakare Roam Formation
• Wakare Tuff Bed
• Wakasari Formation
• Wakayama Formation, Aomori pref.
• Wakayama Formation, Ishikawa pref.
• Wakimoto Formation
• Wakinomachi Formation
• Wakinosawa Andesites
• Wakinosawa Granodiorite
• Wakino Subgroup
• Wakkanai Formation
• Wakubara Pumice Flow Deposit
• Wakugawa Formation
• Wakura Mudstone Member
• Wakurayama Andesite
• Wakurayama Dacite

• Wanakurasawa Unit
• Wanami Gravels Member
• Wanazu Formation
• Waniguchi Andesite
• Waniguchi Formation
• Wani Sands Member

• Wara Formation
• Waraguchi Formation
• Warimodake Andesite
• Warimosawa Body
• Warimosawa Porphyritic Granodiorite
• Wariyama Formation
• Wariyama Granite
• Wariyama Metamorphic Rocks
• Warudaniyama Lava
• Warudaniyama Pyroclastic Rocks
• Warudaniyama volcano
• Waruishi Formation

• Wasabidani Complex
• Wasabu Alternation Member
• Wasabu Alternation of Sandstone and Mudstone
• Wasada Granodiorite
• Wasadani Conglomerate Member
• Washibadake Granite
• Washibaike Lava
• Washibaike Scoria and Explosion Breccia
• Washibaike volcano
• Washigamine Volcanics
• Washima Formation
• Washizu Mud Member

• Wata Clays Member
• Watada Granodiorite
• Watamukiyama Gravel Bed

• Wayama Tuff Member

• West Chokai horseshoe-shaped caldera
• West Chokai volcano
• Western basal volcanic rocks
• Western Iratsu mass
• Western Mass
• Western part (Hida Belt)
• West-Iwate volcano
• West Unit, Himekawa Complex

• Wkm

• WP

• Wrp

• WT
• WTfl-1
• WTfl-2

• Wz