Seiryudo Cave with columnar joints, Genbudo Park, Akaishi, Toyooka-shi, Hyogo, 2022
Seiryudo Cave with columnar joints, Genbudo Park, Akaishi, Toyooka-shi, Hyogo, 2022 by Katsuaki Watanabe青龍洞の柱状節理（兵庫県豊岡市赤石玄武洞公園）Member of #
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Genbudo Cave with columnar joints, Genbudo Park, Akaishi, Toyooka-shi, Hyogo, 2022
Genbudo Cave with columnar joints, Genbudo Park, Akaishi, Toyooka-shi, Hyogo, 2022 by Katsuaki Watanabe玄武洞の柱状節理（兵庫県豊岡市赤石玄武洞公園）Member of #S
Genbudo Cave with columnar joints, Genbudo Park, Akaishi, Toyooka-shi, Hyogo, 2022
Genbudo Cave with columnar joints, Genbudo Park, Akaishi, Toyooka-shi, Hyogo, 2022 by Katsuaki Watanabe玄武洞の柱状節理（兵庫県豊岡市赤石玄武洞公園）Member of #S
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）