2021
Boulder of crystalline limestone, Jimmu Mine, Sogo, Mihara-shi, Hiroshima, 2021
Boulder of crystalline limestone, Jimmu Mine, Sogo, Mihara-shi, Hiroshima, 2021 by Katsuaki Watanabe 結晶質石灰岩の転石（広島県三原市宗郷神武鉱山）
Outcrop of crystalline limestone, Jimmu Mine, Sogo, Mihara-shi, Hiroshima, 2021
Outcrop of crystalline limestone, Jimmu Mine, Sogo, Mihara-shi, Hiroshima, 2021 by Katsuaki Watanabe 結晶質石灰岩の露頭（広島県三原市宗郷神武鉱山）
Graphite-bearing crystalline schist, Jimmu Mine, Sogo, Mihara-shi, Hiroshima, 2021
Graphite-bearing crystalline schist, Jimmu Mine, Sogo, Mihara-shi, Hiroshima, 2021 by Katsuaki Watanabe 石墨を含む結晶片岩（広島県三原市宗郷神武鉱山）
Sandankyo Gorge, Akiota-cho, Hiroshima, 2021
Sandankyo Gorge, Akiota-cho, Hiroshima, 2021 by Katsuaki Watanabe 三段峡（広島県安芸太田町）
Sandankyo Gorge, Akiota-cho, Hiroshima, 2021
Sandankyo Gorge, Akiota-cho, Hiroshima, 2021 by Katsuaki Watanabe 三段峡（広島県安芸太田町）
Sandankyo Gorge, Akiota-cho, Hiroshima, 2021
Sandankyo Gorge, Akiota-cho, Hiroshima, 2021 by Katsuaki Watanabe 三段峡（広島県安芸太田町）
Sandankyo Gorge, Akiota-cho, Hiroshima, 2021
Sandankyo Gorge, Akiota-cho, Hiroshima, 2021 by Katsuaki Watanabe 三段峡竜ノ口の近く（広島県安芸太田町）
Tatsunokuchi, Sandankyo Gorge, Akiota-cho, Hiroshima, 2021
Tatsunokuchi, Sandankyo Gorge, Akiota-cho, Hiroshima, 2021 by Katsuaki Watanabe 竜ノ口（広島県安芸太田町三段峡）
Akadaki, Sandankyo Gorge, Akiota-cho, Hiroshima, 2021
Akadaki, Sandankyo Gorge, Akiota-cho, Hiroshima, 2021 by Katsuaki Watanabe 赤滝（広島県安芸太田町三段峡）
Meotobuchi Deep Water, Sandankyo Gorge, Akiota-cho, Hiroshima, 2021
Meotobuchi Deep Water, Sandankyo Gorge, Akiota-cho, Hiroshima, 2021 by Katsuaki Watanabe 女夫淵（広島県安芸太田町三段峡）
Meotobuchi Deep Water, Sandankyo Gorge, Akiota-cho, Hiroshima, 2021
Meotobuchi Deep Water, Sandankyo Gorge, Akiota-cho, Hiroshima, 2021 by Katsuaki Watanabe 女夫淵（広島県安芸太田町三段峡）
Kuigankai, the sea of rocks in Kui, Kuichoyoshida, Mihara-shi, Hiroshima, 2021
Kuigankai, the sea of rocks in Kui, Kuichoyoshida, Mihara-shi, Hiroshima, 2021 by Katsuaki Watanabe 久井岩海水音峡（広島県三原市久井町吉田）
Kuigankai, the sea of rocks in Kui, Kuichoyoshida, Mihara-shi, Hiroshima, 2021
Kuigankai, the sea of rocks in Kui, Kuichoyoshida, Mihara-shi, Hiroshima, 2021 by Katsuaki Watanabe 久井岩海（広島県三原市久井町吉田）
Kuigankai, the sea of rocks in Kui, Kuichoyoshida, Mihara-shi, Hiroshima, 2021
Kuigankai, the sea of rocks in Kui, Kuichoyoshida, Mihara-shi, Hiroshima, 2021 by Katsuaki Watanabe 久井岩海（広島県三原市久井町吉田）
Dangyokei, Taishakukyo Gorge, Hiroshima, 2021
Dangyokei, Taishakukyo Gorge, Hiroshima, 2021 by Katsuaki Watanabe 断魚渓（広島県帝釈峡）
Dangyokei, Taishakukyo Gorge, Hiroshima, 2021
Dangyokei, Taishakukyo Gorge, Hiroshima, 2021 by Katsuaki Watanabe 断魚渓（広島県帝釈峡）
Taishakukyo Gorge, Hiroshima, 2021
Taishakukyo Gorge, Hiroshima, 2021 by Katsuaki Watanabe 帝釈峡（広島県）
Karamon, a limestone cave, Taishakukyo Gorge, Hiroshima, 2021
Karamon, a limestone cave, Taishakukyo Gorge, Hiroshima, 2021 by Katsuaki Watanabe 唐門（広島県帝釈峡）
Karamon, a limestone cave, Taishakukyo Gorge, Hiroshima, 2021
Karamon, a limestone cave, Taishakukyo Gorge, Hiroshima, 2021 by Katsuaki Watanabe 唐門（広島県帝釈峡）
Taishakukyo Gorge, Hiroshima, 2021
Taishakukyo Gorge, Hiroshima, 2021 by Katsuaki Watanabe 帝釈峡（広島県）
Ombashi, a naturally formed limestone bridge, Taishakukyo Gorge, Hiroshima, 2021
Ombashi, a naturally formed limestone bridge, Taishakukyo Gorge, Hiroshima, 2021 by Katsuaki Watanabe 雄橋（広島県帝釈峡）
Ombashi, a naturally formed limestone bridge, Taishakukyo Gorge, Hiroshima, 2021
Ombashi, a naturally formed limestone bridge, Taishakukyo Gorge, Hiroshima, 2021 by Katsuaki Watanabe 雄橋（広島県帝釈峡）
Sandankyo Gorge, Akiota-cho, Hiroshima, 2021
Sandankyo Gorge, Akiota-cho, Hiroshima, 2021 by Katsuaki Watanabe 三段峡（広島県安芸太田町）
Rhyolite in Sandankyo Gorge, Akiota-cho, Hiroshima, 2021
Rhyolite in Sandankyo Gorge, Akiota-cho, Hiroshima, 2021 by Katsuaki Watanabe 三段峡の流紋岩（広島県安芸太田町）
Sandankyo Gorge, Akiota-cho, Hiroshima, 2021
Sandankyo Gorge, Akiota-cho, Hiroshima, 2021 by Katsuaki Watanabe 三段峡（広島県安芸太田町）
Sandandaki, Sandankyo Gorge, Akiota-cho, Hiroshima, 2021
Sandandaki, Sandankyo Gorge, Akiota-cho, Hiroshima, 2021 by Katsuaki Watanabe 三段滝（広島県安芸太田町三段峡）
Sandandaki, Sandankyo Gorge, Akiota-cho, Hiroshima, 2021
Sandandaki, Sandankyo Gorge, Akiota-cho, Hiroshima, 2021 by Katsuaki Watanabe 三段滝（広島県安芸太田町三段峡）
Sandandaki, Sandankyo Gorge, Akiota-cho, Hiroshima, 2021
Sandandaki, Sandankyo Gorge, Akiota-cho, Hiroshima, 2021 by Katsuaki Watanabe 三段滝（広島県安芸太田町三段峡）
Sarutobi, Sandankyo Gorge, Akiota-cho, Hiroshima, 2021
Sarutobi, Sandankyo Gorge, Akiota-cho, Hiroshima, 2021 by Katsuaki Watanabe 猿飛（広島県安芸太田町三段峡）
Nidandaki, Sandankyo Gorge, Akiota-cho, Hiroshima, 2021
Nidandaki, Sandankyo Gorge, Akiota-cho, Hiroshima, 2021 by Katsuaki Watanabe 二段滝（広島県安芸太田町三段峡）
Sandankyo Gorge, Akiota-cho, Hiroshima, 2021
Sandankyo Gorge, Akiota-cho, Hiroshima, 2021 by Katsuaki Watanabe 猿飛と二段滝に向かう渡し舟の乗り場から見た風景（広島県安芸太田町三段峡）
Sandankyo Gorge, Akiota-cho, Hiroshima, 2021
Sandankyo Gorge, Akiota-cho, Hiroshima, 2021 by Katsuaki Watanabe 猿飛と二段滝に向かう渡し舟の乗り場から見た風景（広島県安芸太田町三段峡）
Inubosaki Lighthouse, Choshi-shi, Chiba, 2021
Inubosaki Lighthouse, Choshi-shi, Chiba, 2021 by Katsuaki Watanabe 犬吠埼灯台（千葉県銚子市） Member of #Choshi Geopark 銚子ジオパーク
Inu-Iwa, a dog-shaped rock, Choshi-shi, Chiba, 2021
Inu-Iwa, a dog-shaped rock, Choshi-shi, Chiba, 2021 by Katsuaki Watanabe 犬岩（千葉県銚子市） Member of #Choshi Geopark 銚子ジオパーク
The beach around Inu-Iwa Rock with black iron sand deposits, Choshi-shi, Chiba, 2021
The beach around Inu-Iwa Rock with black iron sand deposits, Choshi-shi, Chiba, 2021 by Katsuaki Watanabe 黒色の砂鉄が堆積する犬岩周辺の砂浜（千葉県銚子市） Member of #Choshi Geopark 銚子ジオパーク
Wind ripples found on the sandy beach around Inu-Iwa Rock, Choshi-shi, Chiba, 2021
Wind ripples found on the sandy beach around Inu-Iwa Rock, Choshi-shi, Chiba, 2021 by Katsuaki Watanabe 犬岩周辺の砂浜に見られる風紋（千葉県銚子市） Member of #Choshi Geopark 銚子ジオパーク
Sandstone at Cape Inubosaki with iron oxide precipitation along fractures, Choshi-shi, Chiba
Sandstone at Cape Inubosaki with iron oxide precipitation along fractures, Choshi-shi, Chiba, 2021 by Katsuaki Watanabe 割れ目に沿って酸化鉄の沈澱が見られる犬吠埼の砂岩（千葉県銚子市） Member of #Choshi Geopark 銚子ジオパーク
Tafoni found in Cape Inubosaki, Choshi-shi, Chiba, 2021
Tafoni found in Cape Inubosaki, Choshi-shi, Chiba, 2021 by Katsuaki Watanabe 犬吠埼の砂岩に発達したタフォニ（千葉県銚子市） Member of #Choshi Geopark 銚子ジオパーク
Cretaceous Shallow Sea Sediments at Cape Inubosaki, Choshi-shi, Chiba, 2021
Cretaceous Shallow Sea Sediments at Cape Inubosaki, Choshi-shi, Chiba, 2021 by Katsuaki Watanabe 犬吠埼の白亜紀浅海堆積物（千葉県銚子市） Member of #Choshi Geopark 銚子ジオパーク
Basaltic volcanic ash layers found on the Arasaki Coast, Miura Peninsula, Kanagawa, 2021
Basaltic volcanic ash layers found on the Arasaki Coast, Miura Peninsula, Kanagawa, 2021 by Katsuaki Watanabe 三浦半島荒崎海岸に見られる玄武岩質の火山灰層（神奈川県横須賀市）
Volcanic ash layers and a sea cave on the Arasaki Coast, Miura Peninsula, Yokosuka-shi, Kanagawa, 2021
Volcanic ash layers and a sea cave on the Arasaki Coast, Miura Peninsula, Yokosuka-shi, Kanagawa, 2021 by Katsuaki Watanabe 三浦半島荒崎海岸の火山灰層と海食洞（神奈川県横須賀市）
Volcanic ash layers on the Arasaki Coast, Miura Peninsula, Yokosuka-shi, Kanagawa, 2021
Volcanic ash layers on the Arasaki Coast, Miura Peninsula, Yokosuka-shi, Kanagawa, 2021 by Katsuaki Watanabe 三浦半島荒崎海岸の火山灰層（神奈川県横須賀市）
Volcanic ash layers and a sea cave on the Arasaki Coast, Miura Peninsula, Yokosuka-shi, Kanagawa, 2021
Volcanic ash layers and a sea cave on the Arasaki Coast, Miura Peninsula, Yokosuka-shi, Kanagawa, 2021 by Katsuaki Watanabe 三浦半島荒崎海岸の火山灰層と海食洞（神奈川県横須賀市）
Byobugaura Sea Cliff, Choshi-shi, Chiba, 2021
Byobugaura Sea Cliff, Choshi-shi, Chiba, 2021 by Katsuaki Watanabe 屏風ヶ浦の海食崖（千葉県銚子市） Member of #Choshi Geopark 銚子ジオパーク
Byobugaura Sea Cliff, Choshi-shi, Chiba, 2021
Byobugaura Sea Cliff, Choshi-shi, Chiba, 2021 by Katsuaki Watanabe 屏風ヶ浦の海食崖（千葉県銚子市） Member of #Choshi Geopark 銚子ジオパーク
Volcanic ash layers on the Arasaki Coast, Miura Peninsula, Yokosuka-shi, Kanagawa, 2021
Volcanic ash layers on the Arasaki Coast, Miura Peninsula, Yokosuka-shi, Kanagawa, 2021 by Katsuaki Watanabe 三浦半島荒崎海岸の火山灰層（神奈川県横須賀市）
Volcanic ash layers on the Arasaki Coast, Miura Peninsula, Yokosuka-shi, Kanagawa, 2021
Volcanic ash layers on the Arasaki Coast, Miura Peninsula, Yokosuka-shi, Kanagawa, 2021 by Katsuaki Watanabe 三浦半島荒崎海岸の火山灰層（神奈川県横須賀市）
Volcanic ash layers on the Arasaki Coast, Miura Peninsula, Yokosuka-shi, Kanagawa, 2021
Volcanic ash layers on the Arasaki Coast, Miura Peninsula, Yokosuka-shi, Kanagawa, 2021 by Katsuaki Watanabe 三浦半島荒崎海岸の火山灰層（神奈川県横須賀市）